JB/T 8717-1998 This standard is formulated for the first time. This standard specifies the code method, dimensions and technical conditions of 560000 and KOW-560000 thrust angular contact ball bearings for steering gears of automobiles, tractors and engineering vehicles. This standard is applicable to production inspection of bearing manufacturers and user acceptance. JB/T 8717-1998 Rolling bearings Angular contact thrust ball bearings for steering gears JB/T8717-1998 Standard download decompression password: www.bzxz.net

JCS21.100.20
Machinery Industry Standard of the People's Republic of China
JB/T8717-1998
Rolling bearings
Thrust angular contact ball bearings for steering gear
Rolling bearings-Angular contact thrust ball bearings for steering-gear1998-03-19 Issued
Ministry of Machinery Industry of the People's Republic of China
Implementation on 1998-07-01
JB/T8717-1998
This standard is formulated for the first time.
Appendix A and Appendix B of this standard are standard appendices. Appendix C and Appendix D of this standard are indicative appendices. Introduction
This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. Drafting units of this standard: Dalian Machine Tool Accessories Factory, Xiangyang Automobile Bearing Co., Ltd. The main drafters of this standard are: Shuai Dingshui, Sun Shuchun, Zhu Jijun, Li Jun, Jin Qi, Zhang Lei, Yu Guifang. Machinery Industry Standard of the People's Republic of China
Rolling bearings
Rolling bearings-Angular contact thrust ball bearings for steering gear
Rolling bearings-Angular contact thrust ball bearings for steering-gear Scope
JB/T 8717-1998
This standard specifies the code method, external dimensions and technical conditions of 560000 and KOW-560000 thrust angular contact ball bearings for steering gear for automobiles, tractors and engineering vehicles. This standard is applicable to production inspection and user acceptance of bearing manufacturers. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 272 — 93 | | tt | | GB/T 307.2 — 1995 | | tt |
JB/T2974-93
JB/T3034—93||tt| |JB/T3574-1997
JB/T6638-93
JB/T664193
JB/T7048-93
ZBJ1102089
QC/T29096—96
3 Symbols
Rolling bearing
Rolling bearing
Rolling bearing
Rolling Bearings
Rolling bearings
Rolling bearings
Code method
Principles and methods of measurement and inspection
General technical rules
Parameter symbols
High-quality carbon structural steel cold-rolled thin steel plates and stripsHigh-carbon chromium bearing steelTechnical conditions for heat treatment of rolling bearing partsSupplementary provisions for the code method
Rolling bearings
Rolling bearings
Oil seal anti-rust packaging
Rolling bearings
Product marking
Technical conditions for glass fiber reinforced polyamide 66 for rolling bearing cagesResidual magnetism of rolling bearings and its evaluation method
Technical conditions for engineering plastic cages of rolling bearingsInspection rules for rolling bearings and their commodity partsBench test methods for automotive steering gear assemblies
Except the following symbols, other symbols shall comply with the provisions of GB7811. M.: Bearing friction torque
△M: Bearing friction torque fluctuation value
Ki: Radial runout of complete bearing shaft ring
S: Runout of complete bearing shaft ring end face to raceway F: Inscribed circle diameter of steel ball
α: Nominal contact angle
e: Radial play of cage
Approved by the Ministry of Machinery Industry on March 19, 1998
Implementation on July 1, 1998
Code method
JB/T8717-1998
The bearing code method shall comply with the provisions of GB/T272 and JB/T2974. The thrust angular contact ball bearing (see Figure 1) type code is 56. The thrust angular contact ball bearing without shaft ring (see Figure 2) is prefixed with KOW. The inner diameter of the bearing is directly expressed in millimeters using the diameter of the inscribed circle of the steel ball: and separated from the size series code by "/\". Example: KOW5671/15.2D
Figure 1560000 type
Figure 2KOW-560000 type
Marking example: Rolling bearing
6 Overall dimensions
567404
JB/T8717-1998
Bearing overall dimensions are shown in Appendix C (Suggested Appendix)). 7 Technical requirements
7.1 Bearing tolerances are shown in Tables 1 and 2.
Upper deviation||tt| |JB/T8717-1998
Lower deviation
Table 2 Seat ring
Upper deviation
The actual height deviation △T of the bearing is ±0.10mm. The bearing contact angle tolerance is specified in the product drawing. Lower deviation
The shaft ring and seat ring are made of GCr15 steel, and the heat treatment quality shall comply with the provisions of JB1255. Vop
The material and quality of the steel ball shall comply with the provisions of GB308, and its tolerance grade shall not be lower than G16 grade K.
The metal cage is made of 08 or 10 cold-rolled steel plate or steel strip. Its material technical requirements shall comply with the provisions of GB13237 and relevant standards 7.6
.
Non-metal cage is made of engineering plastics, The raw materials and cage technical conditions shall comply with the provisions of JB/T6638 and JB/T7048.
The radial play of stamped cages of complete bearings is shown in Table 3. Table 3 Radial play
The surface roughness R. of the inner hole surface of the shaft ring and the end surface of the shaft ring and the seat ring shall not exceed 0.8um, and the surface roughness R. of the outer cylindrical surface of the seat ring shall not exceed 0.63μm.
The friction torque of the bearing and its fluctuation value shall comply with the provisions of Appendix A (Appendix to the standard). 7.9
The residual magnetism of the bearing shall comply with the provisions of JB/T6641.
The fatigue life of the bearing shall reach 3.5×10° times. 7.11
7.12Other technical requirements shall comply with the provisions of GB/T307.3. 8www.bzxz.net
Measurement Test method
The measurement method of bearing tolerance shall comply with the provisions of GB/T307.2. 3
JB/T8717-1998
The detection of the inscribed diameter of the steel ball can be replaced by the method of adding a standard shaft ring to detect the actual height deviation of the bearing. The detection method of the fluctuation value of the bearing friction torque shall comply with the provisions of Appendix A. The measurement method of the radial play of the cage E, shall comply with the provisions of Appendix B (Appendix of the standard). The bearing life test method shall comply with the provisions of QC/T29096. The bearing residual magnetism measurement method shall comply with the provisions of JB/T6641. Inspection rules
The inspection rules shall comply with the provisions of the finished bearings in ZBJ11020, and the inspection items shall comply with the provisions of Table 4. The qualified quality level AQL value of the main inspection items is 1.5. The qualified quality level AQL value of the secondary inspection items is 4.0. The sample size is drawn according to the general inspection level. Table 4 Sampling inspection items for finished bearings
Main inspection items
Average inner diameter deviation and variation (Ad.r, V, V) Average outer diameter deviation and variation (ADep, Vpmp, V) Radial play of complete bearing shaft ring K
Running of complete bearing shaft ring end face to raceway 5. Radial play of complete bearing cage e: Actual height deviation of bearing △T.
Secondary inspection items
Flexibility of rotation
Assembly chamfer
Surface roughness of mating surface and end face
Appearance quality
Marking and oil seal anti-rust packaging
Bearing friction torque fluctuation value △M. Use special inspection level S-3, and the qualified quality level AQL value is 1.5. Marking, rust prevention and packaging
Bearing marking shall comply with the provisions of JB/T3574,
Rust prevention and packaging of finished bearings shall comply with the provisions of GB8597 and JB/T3034. Bearing friction torque and fluctuation value
JB/T87171998
Appendix A
(Standard Appendix)
Measuring method of bearing friction torque and fluctuation value Bearing friction torque and fluctuation value shall comply with the provisions of Table A1. Table A1
Measurement method
See Figure A1 for the measurement method.
0.15~0.30
0:34-0.61
0.70~1.20
Install the bearing onto the spindle of the calibrated bearing friction torque fluctuation meter, tighten the preload nut, adjust the bearing friction torque to the range of M, value in Table A1, turn the fluctuation meter handle more than - turn, the change in the bearing friction torque is its fluctuation value △M:. A
Inspection instrument
Tested bearing
Standard bearing
JB/T 87171998
Appendix B
(Standard Appendix)
Method for measuring the radial play of the cage of a complete set of bearingsMethod for measuring the radial play of the cage of a complete set of bearingsThe method for measuring the radial play of the cage of a complete set of bearings is shown in Figure B1. Fix the seat washer, apply a stable axial load to the shaft washer (see Table B1), make the steel ball contact the raceway, place the dial gauge probe at the outer diameter of the large end of the cage, and move it back and forth along the radial plane by hand. The difference between the table values ​​is the radial play of the cage, and then change the measuring point position. The measuring points must not be less than 3.
JB/T8717—1998
Appendix C
(Suggested Appendix)
Bearing Dimensions
The 560000 bearing dimensions are as specified in Table C1. Table C1
Bearing model\
569304
567404X3
567404
569305
569305X2
567405X3
569306
1) For the comparison table of new and old bearing models, see Appendix D. D
The overall dimensions of KOW-560000 bearings shall comply with the provisions of Table C2. Table C2
Bearing type
KOW-5617/15.2
KOW-5617/19.8
KOW-5617/20.3TN1
KOW-5617/22.1TN1
KOW-5617/25.6
1) For the comparison table of new and old bearing types, see Appendix D. F
For the comparison table of new and old bearing types, see Table D1.
569304
567404X3
567404
569305
569305X2
567405X3
KOW-5617/15.2
KOW-5617/ 19.8
KOW-5617/20.3TN1
KOW-5617/22.1TN1
KOW-5617/25.6
JB/T 8717-1998
Appendix D
(Appendix of Prompt)
Comparison of Old and New Bearing Models
9168304
9168404
168404
9168305
168705
168805
9168306
128202
128802
128702A
128304
People's Republic of China
Mechanical Industry Standards
Rolling Bearings
Thrust Angular Contact Ball Bearings for Steering Gear
JB/T 87171098
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)
Format 880×12301/16 Printing Sheet 3/4 Number of Words 18,000 First Edition June 1998 First Printing June 1998 Number of Prints 00001-500 Cost 10.00 Yuan
No. 98-062
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