This standard specifies the main dimensions and tolerances of self-lubricating ball end joint bearings. This standard applies to self-lubricating ball end joint bearings of the following structures: a. SQ…C type ball end joint bearings; b. SQ…C-RS type ball end joint bearings; c. SQZ…C type ball end joint bearings; d. SQZ…C-RS type ball end joint bearings; e. SQD…C type ball end joint bearings. JB/T 5306-1991 Main dimensions and tolerances of self-lubricating ball end joint bearings JB/T5306-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB5306-1991
Self-lubricating ball head rod end joint bearing
Main dimensions and tolerances
Issued on June 25, 1991
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Self-lubricating ball head rod end joint bearing
Main dimensions and tolerances
Subject content and scope of application
This standard specifies the main dimensions and tolerances of self-lubricating ball head rod end joint bearings. This standard applies to the following structures of self-lubricating ball head rod end joint bearings: a. SQC ball head rod end joint bearings:
b. SQC-RS ball head rod end joint bearings; c. SQZC ball head rod end joint bearings;
d. SQZC-RS ball head rod end joint bearings: e. SQDC ball head rod end joint bearings.
Reference standard
GB1801
GB 197
GB3104
GB4199
3Symbols
Classification of joint bearings
Code method of joint bearings
Assembly chamfer limit of rolling bearings
Tolerance and fit dimensions to 500mm holes, shaft tolerance zones and fitsTolerance and fit of ordinary threads (diameter 1~355mm)Tolerances of fastenersBolts, screws and nuts
Width across flats of hexagonal fasteners
Rolling bearings
Tolerance definition
d: Shaft diameter of ball head
d: Nominal thread diameter of ball head and ball seat d2: Shoulder diameter of ball head
d3: Outer diameter of sealing cover
1: Length of ball head or direction of ball headTotal length of bearing1: Thread length of ball head
2: From end face of shoulder of ball head to ball seat Center or ball head center or ball head seat ring near end distance: ball head rod end face to ball head seat rod center line or ball head seat ring near end distance S: ball head rod opposite side width
L: bearing total length or ball head seat rod length
L: ball head seat rod end face to ball head center distance
Ministry of Machinery and Electronics Industry 1991-06-25 approved JB5306-1991
1992-07-01 Implementation
L2: Ball seat stem shoulder height
D: Ball seat ring outer diameter
D: Ball seat stem diameter
D2: Ball seat shoulder diameter
D3: Ball seat outer diameter
S: Ball seat stem shoulder width
C: Ball seat ring width
Factory: Ball seat ring outer chamfer
a: Allowable tilt angle
JB 5306—1991bzxZ.net
4: Deviation of the distance between the end face of the ball head shoulder and the center of the seat rod or the center of the ball head or the near end of the ball head seat ring 4LIs: Deviation of the distance between the end face of the ball head seat rod and the center of the ball head 4cs: Deviation of the width of the ball head seat ring
4 Dimensions and tolerances
4.1 Dimensions
4.1.1 SQC and SQC-RS types shall be in accordance with the provisions of Figure 1, Figure 2 and Table 1. 4.1.2 SQZ*C and SQZ**C-RS types shall be in accordance with the provisions of Figure 3, Figure 4 and Table 2. 4.1.3 SQDC type shall be in accordance with the provisions of Figure 5 and Table 3. 4.2 Tolerances
The tolerances of the ball head rod end joint bearings in this standard shall be in accordance with the provisions of Table 4. Figure 1
SQC type
SQ5C-RS
SQ6C-RS
SQ8C-RS
SQ10C-RS
SQ12C-RS
SQ14C-RS
SQ16C-RS
SQ18C-RS
SQ20 C-RS
SQ22C-RS
SQ5C-RS
SQ6C-RS
SQ8C-RS
SQ10C-RS||tt| |SQ12C-RS
SQ14C-RS
SQ16C-RS
SQ18C-RS
SQ20C-RS
SQ22C-RS
M10×1.25
JB5306-1991
SQC-RS type
Dimensions of SQ+C type and SQ-C-RS type
Note: The thread of the ball head seat rod can be right-handed or left-handed. If it is left-handed, the bearing model should add "L" left-6H; SQL10C-RSM10x1.25 left 6H. Rod
Thread mark needs to add "left"
Inclination angle
For example:
SQL5CM5
JB5306—1991
Figure 3 SQZC type
Figure 4 SQZ··C-RS type
SQZ10C
SQZ12C
SQZ14C
SQZ16C
SQZ18C
SQZ2 0C | |tt | -RS
SOZ8C-RS
SQZ10C-RS
SQZ1 2C-RS | | tt | | SQZ14C-RS | Z10C-RS
SQZ12C-RS
SQZ14C- RS
SQZ16C-RS
SQZ18C-RS
SQZ20C-RS
SQZ22C-RS
JB5306-1991
Dimensions of SQZC and SQZ·C-RS
Note: The thread of the ball head seat rod can be right-handed or left-handed. If it is left-handed, the bearing model should add "L",
Left 6H: SQZL12CRS M12x1.25 Left 6H.8
The thread mark should be added with "left".
For example:
Inclination angle
SQZL5CM5
SQD10C
SQD12C
SQDI4C
SQD16C
(nominal
size)
It is stipulated in
197:
External thread
Internal thread
Upper deviation
JB5306—1991
SQDC type size
Ball head rod
Table 4 Tolerance
Lower deviation
Upper deviation The provisions for the difference
lower deviation
in the product
grade C
provisions
in the provisions
ball head seat
274
inclination angle
upper deviation
lower deviation
JB5306-1991
Appendix A
Ball head rod end joint bearing code method
(supplement)
A1 The code of the ball head rod end joint bearing is composed of three sections. The first section uses letters to indicate the structural type of the bearing, the middle section uses numbers to indicate the millimeter of the ball head rod shaft diameter, and the rear section uses letters to indicate the structural characteristics and materials. The structural type codes and names of ball head rod end joint bearings are as follows: A2
SQ: indicates curved rod ball head rod end joint bearings: SQZ: indicates straight rod ball head rod end joint bearings: SQD: indicates single rod ball head rod end joint bearings. Code example:
Additional instructions:
With sealing cover
The sliding surface of the ball head seat is sintered bronze composite material. The shaft diameter of the ball head rod is 10mm
Right-hand threaded straight rod ball head rod end joint bearings
This standard is proposed by the National Technical Committee for Standardization of Rolling Bearings. This standard is under the jurisdiction of Luoyang Bearing Research Institute. This standard was drafted by Fujian Longxi Bearing Factory. 7
People's Republic of China
Mechanical Industry Standard
Self-lubricating Ball Joint Rod End Bearing
Main Dimensions and Tolerances
JB 53061991
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×12301/16
5 Printing Sheets 3/4 Number of Words 14,000
First Printing in July 1991
First Edition in July 1991
Printing Quantity 1-2000
Price 1.20 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn166190
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