GB/T 5269-1999 Double pitch precision roller chains and sprockets for transmission and conveying
Some standard content:
GB/T5269-1999
This standard is equivalent to the international standard ISO1275:1995 "Double pitch precision roller chain and sprocket for transmission and conveying". This standard is a revision of GB/T5269-1985 "Double pitch precision roller chain and sprocket for transmission and conveying". Compared with GB/T5269-1985, this revision mainly reflects the change of the standard adoption principle and the revision of the international standard version. While adopting the standard as equivalent, the following two places in the standard have been supplemented and modified to the international standard text: 1. The diameter tolerance is given for the measuring column for measuring the root circle diameter of the sprocket; 2. The annotations of single and double cut tooth sprockets have been edited in the text. This standard replaces GB/T5269-1985 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed by the State Bureau of Machinery Industry. This standard is under the jurisdiction of the National Technical Committee for Chain Transmission Standardization. Drafting units of this standard: Chain Transmission Research Institute of Jilin University of Technology, Zhuji Chain General Factory Main drafters of this standard: Zhao Sailiang, Guo Zhongxiang, Shou Zhongcan, Sui Xuemin, Meng Xiangbin. GB/T5269--1999
ISO Foreword
ISO (International Organization for Standardization) is a worldwide federation of national standardization organizations (ISO member states). The work of formulating international standards is usually carried out by ISO technical committees. Each member country has an interest in a project for which a technical committee has been established and has the right to participate in the committee. Governmental and non-governmental international organizations associated with ISO also participate in some of the work. ISO works closely with the International Electrotechnical Commission (IEC) in formulating electrical standards. The draft international standard is sent by the technical committee to each member country for voting. It can only be issued as an international standard if at least 75% of the voting member countries agree.
International standard ISO1275 was formulated by ISO/TC100 Technical Committee on Chains and Sprockets for Transmission and Conveying. The third edition of this standard is a technical revision of the second edition (ISO) 1275:1984) and replaces the second edition. Appendix A is an integral part of this standard.
1 Scope
National Standard of the People's Republic of China
Double-pitch precision roller chains and sprockets for transmission and conveyorsGB/T 5269-1999
idt ISO 1275:1995
Replaces GB/T5269-1985
This standard specifies the dimensions, tolerances, measuring lengths, inspection tests and minimum tensile loads of double-pitch precision roller chains and sprockets for transmission and conveyors.
Double pitch precision roller chain is derived from some short pitch transmission precision roller chain (GB/T1243), so except for the double pitch, the chain link size is the same. Compared with the short pitch chain derived from it, the use of double pitch chain should be relatively reduced in terms of heavy work capacity, power transmission and operating speed.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. The versions shown are valid at the time of publication of this standard. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T1243--1997 Precision roller chains and sprockets for short pitch transmission (eqV[S606:1994) GB/T1800.3--1998 Limits and fit basis Part 3: Table of standard tolerances and basic deviations (eqV1S0286-1:1988)
3 Transmission chain
3.1 Terminology of chains and their components
The terminology of chains and their components is shown in Figures 1 and 2, but the shape of the chain plates in the figures does not specify the actual shape of the chain plates. 3.2
Double pitch precision roller chains for transmission are indicated by the chain numbers in the first column of Table 1. These chain numbers are formed by adding the prefix \2\ to the corresponding chain numbers in GB/T1243.
Example: Chain 20813GB/T5269 (or ISO1275-20813) 3.3 Dimensions
The chain dimensions shall comply with the provisions of Figure 3 and Table 1. In order to ensure the interchangeability of chain links produced by different manufacturers, the standard specifies the maximum and minimum values of the dimensions. This is a limitation for interchangeability, not a manufacturing tolerance. This standard only specifies the dimensions of single-row double-pitch chains. 3.4 Tensile test
3.4.1 Minimum tensile load is the minimum tensile load value that the tensioned chain must be able to reach when the tensile breaking test is performed on a single-row chain specimen according to 3.4.2. The minimum tensile load is not a working load, it is mainly used to compare with non-structural chains. For information on the use of chains, the manufacturer should be consulted or their published data should be consulted. Approved by the State Administration of Quality and Technical Supervision on October 11, 1999, and implemented on May 1, 2000
Inner chain plate
a) Inner chain link
Fixed connection
Secret
Removable chain plate
Ⅲ Locking parts
) Removable connecting chain link
GB/T 5269 —1999
Inner chain plate
1 Chain plate size see Table 1
2 The locking parts can be of different forms, the figure is only an example. o
Figure 1 Double pitch chain
Pin: Rivet head:
c) Composite transition link
Bent link plate
Outer link plate
√Outer link plate
b) Outer link
Bent link plate
Yellow link plate
Uneven joint pin
d) Single transition link
Figure 2 Type of chain link
3.4.2 During the test, the tensile load should be slowly applied to both ends of the chain. The value should not be less than that specified in Table 1. The chain segment should contain at least 5 free links. The fixture used should allow the two ends of the chain centerline to move freely in the hinge normal plane. Failure should be regarded as the first occurrence of an increase in the elongation of the specimen without a further increase in the load, that is, the peak point of the load-tension diagram.
If failure occurs at the link where the specimen is connected to the chuck, the test is invalid. 3.4.3 The tensile test is a destructive test. Even if the chain is not significantly damaged after being subjected to the factory minimum tensile load, the stress on the chain has exceeded the material yield point, so the chain cannot be used after the tensile test. 3.5 Inspection test
It is recommended to conduct an inspection test on all chains. The tensile load of the inspection test is 1/3 of the minimum tensile load in Table 1. 3.6 Chain length accuracy
The assembled chain should be measured after the inspection test and before lubrication. The length of the chain to be tested should be at least:
a) 610mm for chain numbers 208A to 210B; b) 1220mm for chain numbers 212A to 232B. Both ends of the chain to be tested should be inner links. The chain to be tested should be supported over the entire length and the measuring force given in Table 1 should be applied. The deviation of the measured chain length from its nominal size shall not exceed 81%. 111
GB/T 5269-1999
When multiple chains are required to be driven in parallel, the chain length accuracy of the selected chain is also the same as the above regulations, but it should be negotiated with the chain manufacturer for matching selection
3.7 Marking
The chain must have the manufacturer's name or trademark mark. The chain should be marked with the chain number listed in Table 1, transition link
chain section
chain channel height, which is the minimum height that the assembled small roller series chain can pass through, and the full width of the chain with locking parts:
·Rivet head pin for locking part: force +6
Headed pin with positive locking part on the side: h, 11.6hPin with locking parts on both sides: b, 26
Figure 3 Chain
" Roller Roller
GB/T 5269—1999
Main dimensions, measuring force and tensile load of chain Table 1
Chain Chain plate
" Bushing
Height Chain link 2)
! Diameter
"Within section
(large)
(small)
maxmin
7. 9515. 88
.4 1 8.51
131. 7510. 16119. 05
2101331.7510.1619.05
2.0722.23
15.8828. 5811
12.33)12.07
12. 0711.81
15. 35|15. 09
14. 9914.
5. 08|5.13
15. 88|28. 58117. 02
220A63.519.0539.67
19.0539.67
224B/76.225. 4
228B 88. 9 [27. 94
232B101. 6|29. 21
5.9818. 34
:7716.3916.
7. 96 121, 39124.
8. 33 121.3421, 08
9. 56 |30. 48:30
19. 56 10. 19/10. 24|26. 68, 26.4525.22
1. 1111. 14|36. 35
25. 4 14, 63114.6833. 7333
minmax
[11.18 11. 31 15. 8
1 11.311. 43
13.8413.97
13.28113.4
15. 62115.
2.6122.74
25.4525.58
27.4627.59:41.1
137.9238.05
30.9915.915.9537.45,37.0821.346.5846.711
30.9917.8117.8642.72,42.2924.445.5745.7|67.41）Large rollers are mainly used in conveyor chains, but sometimes they are also used in transmission chains. Large roller chains are indicated by adding \I\ after the chain number. 2) For heavy duty, it is recommended not to use transition links on the chain. 3) The actual size depends on the locking member form, but shall not exceed this size. Detailed information should be obtained from the manufacturer. 4 Conveyor chain
4.1 Overview
If not otherwise specified, the shape, size and inspection items of double pitch chains and sprockets for conveying shall comply with the provisions of Chapters 3 to 5 of this standard, but Table 2 shall be used instead of Table 1. The chain plates of conveyor chains are usually made into straight-edge (no waist) chain plates, and large rollers (d,) can also be used. This situation is shown in Figure 4. e
4.2 Terminology
Figure 4 Large roller conveyor chain
The terminology in Figure 2 is also applicable to conveyor chains, but the chain plate shapes in Figures 2 and 4 do not specify the actual shape of the chain plates.
4.3 Chain number
Double pitch precision roller chain with straight edge chain plate for conveying is indicated by adding a prefix ( before the corresponding transmission chain number. When large rollers (d,) are used, a suffix L must be added after the chain number. When it is necessary to distinguish the size of the rollers used in the chain, the suffix S can be added after the chain number for small roller chains.
4.4 Size
When large rollers are used, d, in the sprocket calculation formula, must be replaced with d, and the size should comply with the provisions of Table 2. 116
Chain No. 1)
Jc210A
Pitch, rolled
「(small) (large)
max max
GB/T 5269 -1999
Main dimensions, measuring force and tensile load of chain
「Bushing
Chain【Chain plate
, diameter
25.47.9515.887.85
8.5115.887.75
31.7510.1619.059.4
[31.7510, 1619. 05, 9. 65
38.1|11.9122.23|12.57
11. 9122. 2312. 57
C212A-H
Jc212B
IC216A-H
Inner diameter channel
[Height
12. 0722. 2311. 68 5. 72
15.88|28.5815.75
5813. 751 7.
15.88|28.5817.028.28
19. 0539. 67/ 18. 9
JC 220A-H63.519. 0539,67
JC224A-H
18.919.54
12. 33:12. 07
112. 0711.81
tninmax
5. 35 [15. 09/ 8. 4
14. 99/14. 738.4
5. 98 : 18. 34 [18. 08 ]
5. 98 1 18. 34|18. 08
7. 96 124. 39/24.
7. 96 24. 39|24. 13
21.34/21.08
30. 48130.
19.0539.6719.5610.1910.2426.6826.4222.23!44.4525.2211.1111.14|36.5536.76.222.23144.45
525.2211.11 11.14|36. 5536.225. 4 144, 45
Pin!
11. 18,11. 31i 17. 8
11.311.43
.84 13.
3.28.13. 41
175117. 881
:43119. 561 29.8
5.6215.75
24.2824.41
27. 46/27.
29.1129. 2141. 3
29. 01|29. 14/ 43. 2
35.4635.59
19.137.1837.31 54.0
25.414.6314.6833.7333.419.137.9238.0553,4C232A-H101.628.5857.1531.75/14.29j14.3348.63|48.225.246.89|47.02|68.7max
1110124.6
1110124.6
2000|222
Note: Except for the roller diameter, the other dimensions of the large roller chain are the same as the corresponding values in Table 1. Usually, the chain plates of large roller chains are straight-edge chain plates (without waist). 1) The chain number is the transmission chain number in Table 1 with a prefix (for conveyor chains) and a suffix S (for small roller chains) or I (for large roller chains) as appropriate. The suffix H indicates a heavy-duty or high-strength chain. 2) The actual size depends on the type of locking member, but must not exceed the given size: detailed information should be obtained from the manufacturer. 4.5 Chain length accuracy
The deviation between the chain length of a chain without accessories and its nominal length must not exceed +5%. The deviation between the chain length of a chain with accessories and its nominal length must not exceed %. 4.6 Marking
The chain must have the manufacturer's name or trademark mark. The chain should be marked with the chain number listed in Table 2. 4.7 Accessories
4.7.1 Overview
Unless otherwise specified, the dimensions and inspection of chains with accessories shall comply with the provisions of Chapter 3. 4.7.2 Code
Accessories are available in two forms, but with the same basic dimensions. See Table 3 for details. The codes and distinguishing features of the accessories are as follows: K1: One hole is opened in the middle of each accessory platform. K2: Two holes are opened in the center of each accessory platform. They are shown in Figure 5.
4.7.3 Dimensions
The dimensions of the accessories must comply with the provisions of Table 3. GB/T 5269
Note: K1 type accessory plate has only one hole, K2 type accessory plate has two holes, and the others are alternate Figure 5 K type accessories
Table 3 type accessory plate dimensions
Chain number!
C 212A-H
C 216A-H
C 220A-H
C224AH
C232AH
Platform height
1) The chain number suffix H indicates heavy-duty or high-strength chain. 4.7.4 Manufacturing
Transverse center distance
Longitudinal hole center distance
The actual shape of the K-type attachment plate is determined by the manufacturer, but the attachment is usually a one-piece structure, that is, a platform is bent out of an enlarged chain plate. See Figure 5.
The length of the attachment plate is also determined by the manufacturer, but the size should be sufficient to accommodate the two holes of the K2 attachment, and adjacent chain links should not be involved during operation. K1 and K2 attachments are generally of the same length. 4.7.5 Marking
The marking on the one-piece structure attachment is the same as the marking on the chain plate it replaces. 118
5 Sprocket
5.1 Terminology
GB/T 5269
All terms and definitions of sprockets are based on the basic dimensions of the chain in Figure 3 and Tables 1 and 2. 5.2 Diameter size and tooth shape
5.2.1 Parameters
The parameters of diameter size and tooth shape are shown in Figure 6.
b. = Tooth side chamfer
b= Tooth width
b1- Minimum value of inner width of chain inner section
d- Pitch circle diameter
d. Flange top circle diameter
di= Tooth root circle diameter
d. Maximum tooth side flange diameter
di- Maximum roller diameter
ha - 5.2.2 Pitch circle chord tooth height
5.2.2.1 Pitch circle diameter d
h Maximum chain plate height
1 Chord pitch, equal chain pitch
.: 1 Shoulder fillet radius
, = tooth profile arc radius
Roller positioning arc radius
Factory, 2 Tooth side arc radius
2 Effective number of teeth, equal to the number of chain links that can actually be wrapped around the sprocket! · Actual number of teeth on double-cut sprocket - 2||tt| |α=tooth groove angle
Figure 6 Diameter size and tooth shape
sin180g
Appendix A (Standard Appendix) gives the pitch circle diameter coefficient of the factory unit pitch according to the number of teeth. 5.2.2.2 The limit deviation of the measuring cylinder diameter dk
is\:*0mm.
5.2.2.3 Root circle diameter d.
Instructions for use:
1) International Standard (1S) 1275: 1995) only stipulates that dr=di
d -- d- d.
Table 4 gives the limit deviations of the tooth root circle diameter, GB/T5269
tooth root circle diameter d
127d250
dt>250
1) See GB/T 1800.3
5.2.2.4 Measuring distance of the measuring rod (see Figure 7)
For sprockets with even numbers of teeth:
For single-cut sprockets with odd numbers of teeth:
Limit deviation of tooth root circle diameter
Upper deviation
Mx = d + deni
Mr = dcos 90°
For double-cut sprockets with odd numbers of teeth:
+draun
Mu dcos
To measure the measuring distance of the gauge pins for an even number of teeth, two gauge pins need to be placed in two completely opposite tooth grooves. To measure the measuring distance of the gauge pins for an odd number of teeth, two gauge pins need to be placed in two nearly opposite tooth grooves. The tolerance of the lower deviation
gauge pin measuring distance is the same as the tolerance of the corresponding street root circle diameter. Note 1: The sprocket of a double pitch chain can be made into a single-cut or double-cut tooth: the effective number of teeth of a single-cut tooth sprocket (shown by the solid line in the figure) is equal to the actual number of teeth (≥2); the double-cut tooth sprocket (shown by the dotted line in the figure) is to cut another set of teeth in the middle of each tooth of the single-cut tooth sprocket. In this case, the effective number of teeth of the sprocket is equal to half of the actual number of teeth (1/2).
The number of teeth of a single-cut tooth sprocket ≥ must be an integer. The actual number of teeth of the double-cut sprocket = is an integer. But when 2 is an odd number, the effective number of teeth ≥ becomes a fractional double-pitch chain. The double-cut sprocket cannot be used with a short pitch roller chain. H
Even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation) of the sprocket in one rotation. The end face runout of the straight part of the sprocket tooth side to the axis of the shaft hole should not exceed the following values:
0.000 9d;--0.08mm to 1.14mm at most For assembled (welded) sprockets, if the calculated value of the above formula is small, 0.25mm can be used as the minimum limit value. 121
5.5 Pitch accuracy of gear teeth
GB/T 5269
The pitch accuracy of gear teeth is important and the details should be agreed with the manufacturer. 5.6 Tooth number range
The main tooth number range adopted in this standard is 5 to 75 (including the intermediate numbers of 5 to 74!). The preferred tooth numbers are: 7, 9, 10, 11, 13, 19, 27, 38 and 57. 5.7 Aperture tolerance
If there is no negotiation between the user and the manufacturer, the aperture tolerance is H8 (see GB/T1800.3). 5.8 Marking
The sprocket should have the following markings:
a) manufacturer name or trademark;
b) number of teeth;
c) chain number (or manufacturer code).8 Markings
Sprockets should have the following markings:
a) manufacturer's name or trademark;bzxz.net
b) number of teeth;
c) chain number (or manufacturer's code).8 Markings
Sprockets should have the following markings:
a) manufacturer's name or trademark;
b) number of teeth;
c) chain number (or manufacturer's code).4 Manufacturing
Transverse center distance
Longitudinal hole center distance
The actual shape of the K-type attachment plate is determined by the manufacturer, but the attachment is usually a one-piece structure, that is, a platform is bent out of an enlarged chain plate. As shown in Figure 5.
The length of the attachment plate is also determined by the manufacturer, but the size should be sufficient to accommodate the two holes of the K2 attachment, and adjacent chain links should not be involved during operation. K1 and K2 attachments are generally of the same length. 4.7.5 Marking
The marking on the integral structure attachment is the same as the marking on the chain plate it replaces. 118
5 Sprocket
5.1 Terminology
GB/T 5269
All terms and definitions of sprockets are based on the basic dimensions of the chain in Figure 3 and Tables 1 and 2. 5.2 Diameter size and tooth shape
5.2.1 Parameters
The parameters of diameter size and tooth shape are shown in Figure 6.
b. = Tooth side chamfer
b= Tooth width
b1- Minimum value of inner width of chain inner section
d- Pitch circle diameter
d. Flange top circle diameter
di= Tooth root circle diameter
d. Maximum tooth side flange diameter
di- Maximum roller diameter
ha - 5.2.2 Pitch circle chord tooth height
5.2.2.1 Pitch circle diameter d
h Maximum chain plate height
1 Chord pitch, equal chain pitch
.: 1 Shoulder fillet radius
, = tooth profile arc radius
Roller positioning arc radius
Factory, 2 Tooth side arc radius
2 Effective number of teeth, equal to the number of chain links that can actually be wrapped around the sprocket! · Actual number of teeth on double-cut sprocket - 2||tt| |α=tooth groove angle
Figure 6 Diameter size and tooth shape
sin180g
Appendix A (Standard Appendix) gives the pitch circle diameter coefficient of the factory unit pitch according to the number of teeth. 5.2.2.2 The limit deviation of the measuring cylinder diameter dk
is\:*0mm.
5.2.2.3 Root circle diameter d.
Instructions for use:
1) International Standard (1S) 1275: 1995) only stipulates that dr=di
d -- d- d.
Table 4 gives the limit deviations of the tooth root circle diameter, GB/T5269
tooth root circle diameter d
127d250
dt>250
1) See GB/T 1800.3
5.2.2.4 Measuring distance of the measuring rod (see Figure 7)
For sprockets with even numbers of teeth:
For single-cut sprockets with odd numbers of teeth:
Limit deviation of tooth root circle diameter
Upper deviation
Mx = d + deni
Mr = dcos 90°
For double-cut sprockets with odd numbers of teeth:
+draun
Mu dcos
To measure the measuring distance of the gauge pins for an even number of teeth, two gauge pins need to be placed in two completely opposite tooth grooves. To measure the measuring distance of the gauge pins for an odd number of teeth, two gauge pins need to be placed in two nearly opposite tooth grooves. The tolerance of the lower deviation
gauge pin measuring distance is the same as the tolerance of the corresponding street root circle diameter. Note 1: The sprocket of a double pitch chain can be made into a single-cut or double-cut tooth: the effective number of teeth of a single-cut tooth sprocket (shown by the solid line in the figure) is equal to the actual number of teeth (≥2); the double-cut tooth sprocket (shown by the dotted line in the figure) is to cut another set of teeth in the middle of each tooth of the single-cut tooth sprocket. In this case, the effective number of teeth of the sprocket is equal to half of the actual number of teeth (1/2).
The number of teeth of a single-cut tooth sprocket ≥ must be an integer. The actual number of teeth of the double-cut sprocket = is an integer. But when 2 is an odd number, the effective number of teeth ≥ becomes a fractional double-pitch chain. The double-cut sprocket cannot be used with a short pitch roller chain. H
Even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation) of the sprocket in one rotation. The end face runout of the straight part of the sprocket tooth side to the axis of the shaft hole should not exceed the following values:
0.000 9d;--0.08mm to 1.14mm at most For assembled (welded) sprockets, if the calculated value of the above formula is small, 0.25mm can be used as the minimum limit value. 121
5.5 Pitch accuracy of gear teeth
GB/T 5269
The pitch accuracy of gear teeth is important and the details should be agreed with the manufacturer. 5.6 Tooth number range
The main tooth number range adopted in this standard is 5 to 75 (including the intermediate numbers of 5 to 74!). The preferred tooth numbers are: 7, 9, 10, 11, 13, 19, 27, 38 and 57. 5.7 Aperture tolerance
If there is no negotiation between the user and the manufacturer, the aperture tolerance is H8 (see GB/T1800.3). 5.8 Marking
The sprocket should have the following markings:
a) manufacturer name or trademark;
b) number of teeth;
c) chain number (or manufacturer code).4 Manufacturing
Transverse center distance
Longitudinal hole center distance
The actual shape of the K-type attachment plate is determined by the manufacturer, but the attachment is usually a one-piece structure, that is, a platform is bent out of an enlarged chain plate. As shown in Figure 5.
The length of the attachment plate is also determined by the manufacturer, but the size should be sufficient to accommodate the two holes of the K2 attachment, and adjacent chain links should not be involved during operation. K1 and K2 attachments are generally of the same length. 4.7.5 Marking
The marking on the integral structure attachment is the same as the marking on the chain plate it replaces. 118
5 Sprocket
5.1 Terminology
GB/T 5269
All terms and definitions of sprockets are based on the basic dimensions of the chain in Figure 3 and Tables 1 and 2. 5.2 Diameter size and tooth shape
5.2.1 Parameters
The parameters of diameter size and tooth shape are shown in Figure 6.
b. = Tooth side chamfer
b= Tooth width
b1- Minimum value of inner width of chain inner section
d- Pitch circle diameter
d. Flange top circle diameter
di= Tooth root circle diameter
d. Maximum tooth side flange diameter
di- Maximum roller diameter
ha - 5.2.2 Pitch circle chord tooth height
5.2.2.1 Pitch circle diameter d
h Maximum chain plate height
1 Chord pitch, equal chain pitch
.: 1 Shoulder fillet radius
, = tooth profile arc radius
Roller positioning arc radius
Factory, 2 Tooth side arc radius
2 Effective number of teeth, equal to the number of chain links that can actually be wrapped around the sprocket! · Actual number of teeth on double-cut sprocket - 2||tt| |α=tooth groove angle
Figure 6 Diameter size and tooth shape
sin180g
Appendix A (Standard Appendix) gives the pitch circle diameter coefficient of the factory unit pitch according to the number of teeth. 5.2.2.2 The limit deviation of the measuring cylinder diameter dk
is\:*0mm.
5.2.2.3 Root circle diameter d.
Instructions for use:
1) International Standard (1S) 1275: 1995) only stipulates that dr=di
d -- d- d.
Table 4 gives the limit deviations of the tooth root circle diameter, GB/T5269
tooth root circle diameter d
127d250
dt>250
1) See GB/T 1800.3
5.2.2.4 Measuring distance of the measuring rod (see Figure 7)
For sprockets with even numbers of teeth:
For single-cut sprockets with odd numbers of teeth:
Limit deviation of tooth root circle diameter
Upper deviation
Mx = d + deni
Mr = dcos 90°
For double-cut sprockets with odd numbers of teeth:
+draun
Mu dcos
To measure the measuring distance of the gauge pins for an even number of teeth, two gauge pins need to be placed in two completely opposite tooth grooves. To measure the measuring distance of the gauge pins for an odd number of teeth, two gauge pins need to be placed in two nearly opposite tooth grooves. The tolerance of the lower deviation
gauge pin measuring distance is the same as the tolerance of the corresponding street root circle diameter. Note 1: The sprocket of a double pitch chain can be made into a single-cut or double-cut tooth: the effective number of teeth of a single-cut tooth sprocket (shown by the solid line in the figure) is equal to the actual number of teeth (≥2); the double-cut tooth sprocket (shown by the dotted line in the figure) is to cut another set of teeth in the middle of each tooth of the single-cut tooth sprocket. In this case, the effective number of teeth of the sprocket is equal to half of the actual number of teeth (1/2).
The number of teeth of a single-cut tooth sprocket ≥ must be an integer. The actual number of teeth of the double-cut sprocket = is an integer. But when 2 is an odd number, the effective number of teeth ≥ becomes a fractional double-pitch chain. The double-cut sprocket cannot be used with a short pitch roller chain. H
Even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation) of the sprocket in one rotation. The end face runout of the straight part of the sprocket tooth side to the axis of the shaft hole should not exceed the following values:
0.000 9d;--0.08mm to 1.14mm at most For assembled (welded) sprockets, if the calculated value of the above formula is small, 0.25mm can be used as the minimum limit value. 121
5.5 Pitch accuracy of gear teeth
GB/T 5269
The pitch accuracy of gear teeth is important and the details should be agreed with the manufacturer. 5.6 Tooth number range
The main tooth number range adopted in this standard is 5 to 75 (including the intermediate numbers of 5 to 74!). The preferred tooth numbers are: 7, 9, 10, 11, 13, 19, 27, 38 and 57. 5.7 Aperture tolerance
If there is no negotiation between the user and the manufacturer, the aperture tolerance is H8 (see GB/T1800.3). 5.8 Marking
The sprocket should have the following markings:
a) manufacturer name or trademark;
b) number of teeth;
c) chain number (or manufacturer code).1 Terminology
GB/T 5269
All sprocket terms are based on the basic dimensions of the chain in Figure 3 and Tables 1 and 2. 5.2 Diameter size and tooth shape
5.2.1 Parameters
The parameters of diameter size and tooth shape are shown in Figure 6.
b. = Tooth side chamfer
b= Tooth width
b1-Minimum value of the inner width of the chain
d-Pitch circle diameter
d. Flange tooth top circle diameter
di= Tooth root circle diameter
d. Maximum tooth side flange diameter
di - Maximum roller diameter
ha - Pitch circle chord tooth height
5.2.2 Diameter size
5.2.2.1 Pitch circle diameter d
h Maximum chain plate height
1 Chord pitch, equal chain pitch
.: 1 Shoulder fillet radius
, = tooth profile arc radius
roller positioning arc radius
factory, 2 Tooth side arc radius
2 Effective number of teeth, equal to the number of chain links that can actually be wrapped around the sprocket! · Double-cut sprocket actual number of teeth -2
α=tooth groove angle
Figure 6 Diameter size and tooth shape
sin180g
Appendix A (Standard Appendix) gives the pitch circle diameter coefficient per unit pitch according to the number of teeth. 5.2.2.2 The limit deviation of the measuring column diameter dk
is: *0mm.
5.2.2.3 Root circle diameter d.
Instructions for use:
1) International Standard (1S) 1275:1995) stipulates that dr=di
d -- d- d.
Table 4 gives the limit deviations of the root circle diameter, GB/T5269
Root circle diameter d
127d250
dt>250
1) See GB/T 1800.3
5.2.2.4 Measuring distance of measuring rod (see Figure 7)
For sprockets with even number of teeth:
For single-cut sprockets with odd number of teeth:
Limit deviation of root circle diameter
Upper deviation
Mx = d + deni
Mr = dcos 90°
For double-cut sprockets with an odd number of teeth:
+draun
Mu dcos
To measure the measuring distance of the gauge pins for an even number of teeth, place two gauge pins in two completely opposite tooth grooves. To measure the measuring distance of the gauge pins for an odd number of teeth, place two gauge pins in two nearly opposite tooth grooves. Lower deviation
The tolerance of the gauge pin measuring distance is the same as the tolerance of the corresponding street circle diameter. Note 1: The sprockets of double-pitch chains can be made into single-cut or double-cut teeth: the effective number of teeth of the sprocket of single-cut teeth (shown by the solid line in the figure) is equal to the actual number of teeth (≥2); the double-cut teeth (shown by the dotted line in the figure) is that another set of teeth is cut in the middle of each tooth of the single-cut sprocket. In this case, the effective number of teeth of the sprocket is equal to half of the actual number of teeth (1/2)
The number of teeth of the single-cut sprocket ≥ must be an integer. The actual number of teeth of the double-cut sprocket = is an integer. But when 2 is an odd number, the effective number of teeth ≥ becomes a fractional double-pitch chain. The double-cut sprocket cannot be used with a short pitch roller chain. H
Even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation) of the sprocket in one rotation. The end face runout of the straight part of the sprocket tooth side to the axis of the shaft hole should not exceed the following values:
0.000 9d;--0.08mm to 1.14mm at most For assembled (welded) sprockets, if the calculated value of the above formula is small, 0.25mm can be used as the minimum limit value. 121
5.5 Pitch accuracy of gear teeth
GB/T 5269
The pitch accuracy of gear teeth is important and the details should be agreed with the manufacturer. 5.6 Tooth number range
The main tooth number range adopted in this standard is 5 to 75 (including the intermediate numbers of 5 to 74!). The preferred tooth numbers are: 7, 9, 10, 11, 13, 19, 27, 38 and 57. 5.7 Aperture tolerance
If there is no negotiation between the user and the manufacturer, the aperture tolerance is H8 (see GB/T1800.3). 5.8 Marking
The sprocket should have the following markings:
a) manufacturer name or trademark;
b) number of teeth;
c) chain number (or manufacturer code).1 Terminology
GB/T 5269
All sprocket terms are based on the basic dimensions of the chain in Figure 3 and Tables 1 and 2. 5.2 Diameter size and tooth shape
5.2.1 Parameters
The parameters of diameter size and tooth shape are shown in Figure 6.
b. = Tooth side chamfer
b= Tooth width
b1-Minimum value of the inner width of the chain
d-Pitch circle diameter
d. Flange tooth top circle diameter
di= Tooth root circle diameter
d. Maximum tooth side flange diameter
di - Maximum roller diameter
ha - Pitch circle chord tooth height
5.2.2 Diameter size
5.2.2.1 Pitch circle diameter d
h Maximum chain plate height
1 Chord pitch, equal chain pitch
.: 1 Shoulder fillet radius
, = tooth profile arc radius
roller positioning arc radius
factory, 2 Tooth side arc radius
2 Effective number of teeth, equal to the number of chain links that can actually be wrapped around the sprocket! · Double-cut sprocket actual number of teeth -2
α=tooth groove angle
Figure 6 Diameter size and tooth shape
sin180g
Appendix A (Standard Appendix) gives the pitch circle diameter coefficient per unit pitch according to the number of teeth. 5.2.2.2 The limit deviation of the measuring column diameter dk
is: *0mm.
5.2.2.3 Root circle diameter d.
Instructions for use:
1) International Standard (1S) 1275:1995) stipulates that dr=di
d -- d- d.
Table 4 gives the limit deviations of the root circle diameter, GB/T5269
Root circle diameter d
127d250
dt>250
1) See GB/T 1800.3
5.2.2.4 Measuring distance of measuring rod (see Figure 7)
For sprockets with even number of teeth:
For single-cut sprockets with odd number of teeth:
Limit deviation of root circle diameter
Upper deviation
Mx = d + deni
Mr = dcos 90°
For double-cut sprockets with an odd number of teeth:
+draun
Mu dcos
To measure the measuring distance of the gauge pins for an even number of teeth, place two gauge pins in two completely opposite tooth grooves. To measure the measuring distance of the gauge pins for an odd number of teeth, place two gauge pins in two nearly opposite tooth grooves. Lower deviation
The tolerance of the gauge pin measuring distance is the same as the tolerance of the corresponding street circle diameter. Note 1: The sprockets of double-pitch chains can be made into single-cut or double-cut teeth: the effective number of teeth of the sprocket of single-cut teeth (shown by the solid line in the figure) is equal to the actual number of teeth (≥2); the double-cut teeth (shown by the dotted line in the figure) is that another set of teeth is cut in the middle of each tooth of the single-cut sprocket. In this case, the effective number of teeth of the sprocket is equal to half of the actual number of teeth (1/2)
The number of teeth of the single-cut sprocket ≥ must be an integer. The actual number of teeth of the double-cut sprocket = is an integer. But when 2 is an odd number, the effective number of teeth ≥ becomes a fractional double-pitch chain. The double-cut sprocket cannot be used with a short pitch roller chain. H
Even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation) of the sprocket in one rotation. The end face runout of the straight part of the sprocket tooth side to the axis of the shaft hole should not exceed the following values:
0.000 9d;--0.08mm to 1.14mm at most For assembled (welded) sprockets, if the calculated value of the above formula is small, 0.25mm can be used as the minimum limit value. 121
5.5 Pitch accuracy of gear teeth
GB/T 5269
The pitch accuracy of gear teeth is important and the details should be agreed with the manufacturer. 5.6 Tooth number range
The main tooth number range adopted in this standard is 5 to 75 (including the intermediate numbers of 5 to 74!). The preferred tooth numbers are: 7, 9, 10, 11, 13, 19, 27, 38 and 57. 5.7 Aperture tolerance
If there is no negotiation between the user and the manufacturer, the aperture tolerance is H8 (see GB/T1800.3). 5.8 Marking
The sprocket should have the following markings:
a) manufacturer name or trademark;
b) number of teeth;
c) chain number (or manufacturer code).: 1. Shaft shoulder fillet radius
, = tooth profile arc radius
roller positioning arc radius
factory, 2. Tooth side arc radius
2. Effective number of teeth, equal to the number of chain links that can actually be wrapped around the sprocket! · Double-cut sprocket actual number of teeth -2
α=tooth groove angle
Figure 6 Diameter size and tooth shape
sin180g
Appendix A (Standard Appendix) gives the pitch circle diameter coefficient of the factory unit pitch according to the number of teeth. 5.2.2.2 The limit deviation of the measuring cylinder diameter dk
is\:*0mm.
5.2.2.3 Root circle diameter d.
Instructions for use:
1) International Standard (1S) 1275:1995) stipulates that dr=di
d -- d- d.
Table 4 gives the limit deviations of the root circle diameter, GB/T5269
Root circle diameter d
127d250
dt>250
1) See GB/T 1800.3
5.2.2.4 Measuring distance of measuring rod (see Figure 7)
For sprockets with even number of teeth:
For single-cut sprockets with odd number of teeth:
Limit deviation of root circle diameter
Upper deviation
Mx = d + deni
Mr = dcos 90°
For double-cut sprockets with an odd number of teeth:
+draun
Mu dcos
To measure the measuring distance of the gauge pins for an even number of teeth, place two gauge pins in two completely opposite tooth grooves. To measure the measuring distance of the gauge pins for an odd number of teeth, place two gauge pins in two nearly opposite tooth grooves. Lower deviation
The tolerance of the gauge pin measuring distance is the same as the tolerance of the corresponding street circle diameter. Note 1: The sprockets of double-pitch chains can be made into single-cut or double-cut teeth: the effective number of teeth of the sprocket of single-cut teeth (shown by the solid line in the figure) is equal to the actual number of teeth (≥2); the double-cut teeth (shown by the dotted line in the figure) is that another set of teeth is cut in the middle of each tooth of the single-cut sprocket. In this case, the effective number of teeth of the sprocket is equal to half of the actual number of teeth (1/2)
The number of teeth of the single-cut sprocket ≥ must be an integer. The actual number of teeth of the double-cut sprocket = is an integer. But when 2 is an odd number, the effective number of teeth ≥ becomes a fractional double-pitch chain. The double-cut sprocket cannot be used with a short pitch roller chain. H
Even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation) of the sprocket in one rotation. The end face runout of the straight part of the sprocket tooth side to the axis of the shaft hole should not exceed the following values:
0.000 9d;--0.08mm to 1.14mm at most For assembled (welded) sprockets, if the calculated value of the above formula is small, 0.25mm can be used as the minimum limit value. 121
5.5 Pitch accuracy of gear teeth
GB/T 5269
The pitch accuracy of gear teeth is important and the details should be agreed with the manufacturer. 5.6 Tooth number range
The main tooth number range adopted in this standard is 5 to 75 (including the intermediate numbers of 5 to 74!). The preferred tooth numbers are: 7, 9, 10, 11, 13, 19, 27, 38 and 57. 5.7 Aperture tolerance
If there is no negotiation between the user and the manufacturer, the aperture tolerance is H8 (see GB/T1800.3). 5.8 Marking
The sprocket should have the following markings:
a) manufacturer name or trademark;
b) number of teeth;
c) chain number (or manufacturer code).: 1. Shaft shoulder fillet radius
, = tooth profile arc radius
roller positioning arc radius
factory, 2. Tooth side arc radius
2. Effective number of teeth, equal to the number of chain links that can actually be wrapped around the sprocket! · Double-cut sprocket actual number of teeth -2
α=tooth groove angle
Figure 6 Diameter size and tooth shape
sin180g
Appendix A (Standard Appendix) gives the pitch circle diameter coefficient of the factory unit pitch according to the number of teeth. 5.2.2.2 The limit deviation of the measuring cylinder diameter dk
is\:*0mm.
5.2.2.3 Root circle diameter d.
Instructions for use:
1) International Standard (1S) 1275:1995) stipulates that dr=di
d -- d- d.
Table 4 gives the limit deviations of the root circle diameter, GB/T5269
Root circle diameter d
127d250
dt>250
1) See GB/T 1800.3
5.2.2.4 Measuring distance of measuring rod (see Figure 7)
For sprockets with even number of teeth:
For single-cut sprockets with odd number of teeth:
Limit deviation of root circle diameter
Upper deviation
Mx = d + deni
Mr = dcos 90°
For double-cut sprockets with an odd number of teeth:
+draun
Mu dcos
To measure the measuring distance of the gauge pins for an even number of teeth, place two gauge pins in two completely opposite tooth grooves. To measure the measuring distance of the gauge pins for an odd number of teeth, place two gauge pins in two nearly opposite tooth grooves. Lower deviation
The tolerance of the gauge pin measuring distance is the same as the tolerance of the corresponding street circle diameter. Note 1: The sprockets of double-pitch chains can be made into single-cut or double-cut teeth: the effective number of teeth of the sprocket of single-cut teeth (shown by the solid line in the figure) is equal to the actual number of teeth (≥2); the double-cut teeth (shown by the dotted line in the figure) is that another set of teeth is cut in the middle of each tooth of the single-cut sprocket. In this case, the effective number of teeth of the sprocket is equal to half of the actual number of teeth (1/2)
The number of teeth of the single-cut sprocket ≥ must be an integer. The actual number of teeth of the double-cut sprocket = is an integer. But when 2 is an odd number, the effective number of teeth ≥ becomes a fractional double-pitch chain. The double-cut sprocket cannot be used with a short pitch roller chain. H
Even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation) of the sprocket in one rotation. The end face runout of the straight part of the sprocket tooth side to the axis of the shaft hole should not exceed the following values:
0.000 9d;--0.08mm to 1.14mm at most For assembled (welded) sprockets, if the calculated value of the above formula is small, 0.25mm can be used as the minimum limit value. 121
5.5 Pitch accuracy of gear teeth
GB/T 5269
The pitch accuracy of gear teeth is important and the details should be agreed with the manufacturer. 5.6 Tooth number range
The main tooth number range adopted in this standard is 5 to 75 (including the intermediate numbers of 5 to 74!). The preferred tooth numbers are: 7, 9, 10, 11, 13, 19, 27, 38 and 57. 5.7 Aperture tolerance
If there is no negotiation between the user and the manufacturer, the aperture tolerance is H8 (see GB/T1800.3). 5.8 Marking
The sprocket should have the following markings:
a) manufacturer name or trademark;
b) number of teeth;
c) chain number (or manufacturer code).However, when 2 is an odd number, the effective number of teeth ≥ then the double-cut tooth sprocket of the fractional double pitch chain cannot be used with the short pitch roller chain H
even number of teeth
d-=pitch circle diameter
trtooth root circle diameter
ds=measuring column diameter
Instructions for use:
2: The text L has been edited for editorial purposes.
MR=gauge rod measuring distance
Force-chord pitch, equal to chain pitch
, short pitch roller chain sprocket cannot be used with double pitch chain. Single or double cut tooth sprocket
Odd number of teeth
Figure 7 Gauge rod measuring distance
Solid line = forget
Dashed line——22
5.2.2.5 Tooth circle diameter
GB/T 5269 --- 1999
damax d + 0. 625p - d:
damn d+ pl o.5 - 0.4j - d
It should be noted that damax and damin are applicable to both the smallest and largest tooth groove shapes, but will be limited by the maximum diameter that the tool can process.
In order to facilitate the drawing of larger tooth groove shapes on the drawing board, the chordal tooth height can be calculated from the following formula: hamx = p(0.3125 + 0.8)
harmin=
Note that humx corresponds to damax and hamin corresponds to daminl o5.2.3 End face tooth groove profile
— 0.5d
The actual tooth groove profile processed by cutting methods should have tooth profiles on both sides between the minimum tooth profile radius and the maximum tooth profile radius, and should be smoothly connected with the roller positioning tooth groove arc line at their respective angles. 5.2.3.1 Minimum tooth groove corridor
renax =0.12d(z + 2)
rimin = 0.505d:
amax140°-
5.2.3.2 Maximum tooth groove corridor
remin =0.008d;(z3 + 180)
rimx =0.505d, + 0.069 a
min --120° -.90°
5.2.3.3 Tooth width
br-0.95h, tolerance h14,
Note 2: The user and the manufacturer may also negotiate to use bt=0.93b1 and tolerance h14 (see GB/T1800.3). 5.2.3.4 Tooth side chamfer
banom = 0. 065p
5.2.3.5 Maximum tooth side flange diameter
5.2.3.6 Tooth side chamfer radius
5.3 Radial run-out
dg = pcot 180°
-- 1. 05h, 1 —
rxnom = 0.5p
Measure the radial run-out of the sprocket in one rotation. The maximum radial run-out of the tooth root circle diameter to the axis of the shaft hole shall not exceed the larger of the following two values.
0.0008d,+0.08mm (or 0.15mm), up to 0.76mm. 5.4 End face runout
Measure the end face runout (oscillation
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.