This standard specifies the dimensions, tolerances, measuring loads and minimum tensile loads of bent plate roller chains, as well as the tooth shape and axial tooth profile of the sprockets that match the chain. This standard is applicable to bent plate roller chains used for power and mechanical transmission under heavy working conditions. GB/T 5858-1997 Bent plate roller chains and sprockets for heavy-duty transmission GB/T5858-1997 Standard download decompression password: www.bzxz.net

GB/T5858-1997
This standard is a revision of GB5858-86 "Heavy-duty curved roller chains and sprockets for transmission" based on ISO3512:1992 "Heavy-duty curved roller chains for transmission" formulated by the International Organization for Standardization ISO/TC100. Before the revision, the standard was equivalent to ISO3512:76. After this revision, the standard is equivalent to ISO3512:1992 in technical content and structure, except for deleting the original imperial dimension table given as reference material (Appendix B) in the original ISO standard.
This standard replaces the original GB5858-86 from the date of its release and implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Chain Drive Standardization. The responsible drafting unit of this standard is the Chain Drive Research Institute of Jilin University of Technology. The participating drafting units of this standard are Wujin Chain Factory, Jiangmen Chain Factory, and Mechanical Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are: Zhao Sailiang, Tan Guangcheng, Zhong Songgen, Meng Xiangbin, Sui Xuemin, Li Xinxin, Wang Jinwu. This standard was first formulated in February 1986.
GB/T5858-1997
ISOForeword
ISO (International Organization for Standardization) is a worldwide federation of national standardization organizations (ISO member countries). 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 part of the work. Governmental or non-governmental international organizations related to ISO may also participate in the relevant work. ISO works closely with the International Electrotechnical Commission (IEC) in formulating electrical standards. The draft international standard is sent to each member country by the technical committee for voting. It can only be issued as an international standard if no less than 75% of the member countries vote in favor.
International Standard ISO 3512 was proposed by Technical Committee ISO/TC 100 on transmission and conveyor chains and sprockets. This second edition replaces the first edition (ISO) 3512:1976) and has been technically revised. Appendix A is an integral part of this International Standard. Appendix B is for reference only. 125
1 Scope
National Standard of the People's Republic of China
Heavy-duty cranked-link transmission roller chains and chain wheels
Heavy-duty cranked-link transmission roller chains and chain wheels GB/T 5858---1997
idt ISO 3512:1992
Replaces GB 5858 86
This standard specifies the dimensions, tolerances, measuring loads and minimum tensile loads of cranked-link roller chains. It also specifies the tooth shape and axial tooth profile of the sprockets matching the chain. This standard applies to bent plate roller chains used for power and mechanical transmission under heavy working conditions. The chain dimensions specified in the standard ensure that chains of the same specification are interchangeable in use as a whole chain and that individual links of the chain can be interchanged during maintenance.
Note: The metric dimensions of these chains are converted from the imperial series. 2 Chains
2.1 Chain and parts terms
The terms for chains and parts are shown in Figures 1 and 2. These illustrations do not specify the actual shape of the chain plates. The chain dimensions in Figure 3 are specified in Table 1.
Bent chain plate
Positive locking pin
Figure 1 Assembly drawing of bent chain
Approved by the State Bureau of Technical Supervision on July 4, 1997 126
Figure 2 Typical bent chain parts
Implemented on December 1, 1997
2.2 Chain numberbzxZ.net
GB/T5858--1997
Linear chain plate structure
Straight bent chain plate structure
Figure 3 Dimension code (see Table 1)
Heavy-duty bent roller chain uses the chain number in Table 1: the first two digits are the inches of 1/8 pitch; the last two digits are the inches of 1/16 pin diameter.
GB/T5858—1997
Chain dimensions, measuring force and minimum tensile load (see Figure 3) Table 1
Roller diameter
Outer width of narrow end
Inner width of leading end Pin diameter Sleeve inner diameter
Inner width of wide end
Distance from the tail end of the pin to
center line
Note: The total width of the connecting chain link = h4+5, the total width with locking pins at both ends is 264. 1) I imax : limin ;famax =lzmin e2) Minimum width -0.95b1.
2.3 Dimensions
Chain channel
Chain plate height
Distance from pin end to
Chain plate thickness
Center line
Bent link plate gap dimensions1)
Measurement force
Tensile load
Chain shall comply with the dimensional specifications in Figure 3 and Table 1. The specified maximum and minimum dimensions are to ensure that the links produced by different chain manufacturers can be interchanged. They are the limit dimensions to ensure interchangeability and are not manufacturing tolerances during the production process. 128
GB/T 5858-1997
The pitch force is a theoretical value used to calculate the chain length and sprocket size. This value is not used to check the pitch of a single link. 2.4 Tensile test
2.4.1 The minimum tensile load is the tensile load value that must be reached when the chain sample is subjected to the breaking test in accordance with 2.4.2. This minimum tensile load is not a working load and can only be used for comparison between chains of different structures. The chain user should consult the manufacturer or check the values ​​given by them.
2.4.2 The tensile load during the test shall not be less than the tensile load value specified in Table 1 and shall be applied slowly to both ends of the chain; the chain length shall include at least three free links; the clamp used shall be such that the ends of the chain centerline can move freely in the normal plane of the articulation. Failure shall be considered to have occurred at the ·th vertex of the load-deformation curve, at which point the force no longer increases as the deformation continues to increase.
If damage occurs at the link where the chain is connected to the clamp, the test shall be invalid. 2.4.3 The tensile test is a destructive test. Even if the chain does not suffer obvious damage after being subjected to the minimum tensile load, the force on the chain exceeds its service point. Therefore, the chain that has passed the tensile test cannot be used again. 2.5 Chain length accuracy
The length of the finished chain should be measured without lubrication or with a little lubrication. The standard measuring length should be taken as close to 3050mm. The chain to be tested should be supported throughout the measuring length and the measuring force specified in Table 1 should be applied. The limit deviation of the measured chain length does not exceed 0.32% of the nominal dimension of the measuring length. For parallel transmission chains, the chain length accuracy should be within the above tolerances and should be selected in consultation with the manufacturer. 2.6 Working gap
The bending part of the bending part in the width direction of the bending plate (see the lower part of Figure 3) can be a straight bending or an arc bending. If it is a straight bending type, the distance from the pitch point to the straight line of the bending part should be 1 or 12. If it is an isolated bending type, this distance should be 1 or 1. . When the chain is wrapped around a sprocket with 7 teeth, the radius 15 or 1 should ensure sufficient clearance between the adjacent chain plate ends formed by the radius 1: and. The ends of the chain plates may be extended and have an angle less than 30°, as shown in Figure 3. The chain link construction should normally allow for such extension. 2.7 Marking
Chains shall be marked as follows:
a) manufacturer's name or trademark;
b) standard chain number (see Table 1).
3 Sprockets
3.1 Terminology
All the following sprocket data are based on the basic dimensional parameters of the relevant chain listed in Table 1. Sprocket terminology is listed in the following clauses. 3.2 Sprocket diameter dimensions
3.2.1 Terminology (see Figure 4).
Even number of teeth
Odd number of teeth
Figure 4 Sprocket diameter size
3.2.2 Size
Pitch circle diameter d
GB/T 5858—1997
Appendix A (Standard Appendix) gives the pitch circle diameter per unit pitch, which can be found by comparing the number of teeth. 3.2.2.2 The limit deviation of the measuring cylinder diameter d
is 0.01mm.
3.2.2.3 The root circle diameter d
The deviation value is specified in Table 2 and Table 3.
Root circle diameter
drs305
3051215
Tooth root diameter
305d508
508d914
dt≥>911
3.2.2.4 Measuring distance of measuring rod
Even teeth
Odd teeth
d=d, (see Figure 5)
d, d - d,
Table 2 Machined teeth
Table 3 Non-machined teeth
Mx=d+drnin
Mr-dcos(90\/=)+dmin
For sprockets with even teeth, two measuring rods should be placed in the two opposite tooth grooves to measure the measuring distance of measuring rods. For sprockets with odd teeth, two measuring rods should be placed in the two closest opposite tooth grooves to measure the measuring distance of measuring rods. When measuring, the measuring rod should always be in contact with the working surface of the corresponding gear tooth. The limit deviation of the measuring rod measurement distance is consistent with the limit deviation of the corresponding root circle diameter. 3.3 Tooth shape
3.3.1 Terminology (see Figure 5).
Tooth center line,
GB/T5858-:1997
Force chord pitch, equal to chain pitch; β· Tooth profile angle (see Appendix A); d· Pitch circle diameter; r: Tooth profile (tooth top) segment arc radius; d: Roller diameter, maximum; d root circle diameter; r tooth groove arc radius; d, maximum tooth side flange diameter; Street groove center separation; 2 Number of teeth; 9 Action angle: Figure 5 Tooth shape
3.3.2 Dimensions
The actual tooth groove shape obtained by cutting or similar methods consists of the arc of the tooth profile (tooth top) segment, the length of the working surface and the arc of the tooth groove and the transition curve connected smoothly to each other. The relevant criteria are listed in 3.3.2.1 to 3.3.2.6. 3.3.2.1 Working surface
The working surface is the main functional part of the tooth shape. Its length is equal to 0.01, unless it is restricted and reduced in the following circumstances, that is, all the vertical lines of this part of the tooth shape should be within the vertical lines of the adjacent pitch points on the transition circle. The working surface can be a straight plane or a convex surface. Note: When there are 40 teeth, the chain pitch elongation considered in the above provisions is about 6%. This amount decreases with the increase in the number of teeth. When = 100 teeth, the chain pitch elongation is reduced to less than 2%.
3.3.2.2 Action angle
The action angle is the angle between the center line of the chain link and the normal line of the roller at the contact point of the tooth surface. The working angle of each sprocket tooth surface varies with the number of sprocket teeth, see Appendix A. 3.3.2.3 Maximum tooth side edge diameter d
d, = ctg (180%) 1.05h. 2r (actual value) where h2
chain plate height (see Figure 3 and Table 1), hubs, washers, flanges and fillets will interfere with the chain plate if they exceed the above limits. 3.3.2.4 Tooth groove center separation 5
sprockets used for non-machined teeth or dirty environments: sprockets used for sub-machined teeth or clean environments: 3.3.2.5 Tooth groove arc radius r
3.3.2.6 Tooth profile (tooth top) segment arc radius r 3.4 Axial tooth profile
3.4.1 Terminology (see Figure 6).
GB/T 5858: :1997
rimax - d,/2
brTooth width; ha-tooth chamfer width; b: tooth chamfer height; de-flange diameter; r-tooth side flange fillet radius Figure 6 Axial tooth profile
3.4.2 Dimensions
brmx = 0. 9bl
3.5 Radial circular runout
The radial runout of the tooth root circle relative to the hole measured after one rotation of the sprocket shall not exceed the following values. For non-machined teeth: 0.005d; or 1.5mm. Whichever is greater, but not more than 10mm. For machined teeth: 0.001d: or 0.2mm. Whichever is greater, but not more than 5mm. 3.6 End Circular Runout
The axial runout of the sprocket tooth end face relative to the shaft hole shall not exceed the radial circular runout value specified in 3.5. 3.7 Tooth Number Range
This standard is mainly applicable to the tooth number range of 7 to 100 teeth. 3.8 Marking
The sprocket shall be marked as follows:
a) manufacturer's name or trademark;
b) number of teeth;
c) chain mark (standard chain number or/and manufacturer's mark). 132
GB/T5858—1997
Appendix A
(Standard Appendix)
Pitch Circle Diameter
Table A1 gives the standard pitch circle diameter of the sprocket corresponding to the unit pitch chain. The pitch circle diameter of the sprocket corresponding to each standard pitch chain is directly proportional to the chain pitch. Note: To avoid the danger of too large root circle, the last digit of the values ​​in the table has been rounded off. Pitch circle diameter d, effective angle, tooth profile angle β Table Al
Unit pitch minute
degree circle diameter"
effective angle
9, (°)
Tooth profile circle
Unit pitch minute
degree circle diameter"
effective angle
tooth profile angle
Unit pitch minute
degree circle diameter!
Action angle
1) is sometimes called "unit pitch circle diameter". 134
GB/T 5858--1997
Table AI (Complete)
Tooth profile angle
Unit pitch pitch circle true diameter" [
Action angle
, ()
Tooth profile
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