JB/T 8570-1997 This standard was originally an industry (internal use) standard, and has been revised to an industry standard. This standard specifies the dimensions, codes and technical conditions of deep groove ball bearings (hereinafter referred to as bearings) made of high-quality carbon structural steel for use at low speeds and light loads (such as push vehicles, casters of appliances, sliding doors, and manual machinery). This standard is applicable to production inspections by bearing manufacturers and user acceptance. JB/T 8570-1997 Rolling bearings Carbon steel deep groove ball bearings JB/T8570-1997 Standard download decompression password: www.bzxz.net

JB/T8570
—1997
This standard was originally an industry standard (for internal use). After this revision, it has become an industry standard. This revision adds the outer dimensions of bearings, and makes changes to the bearing code, technical requirements and standard writing format. This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The responsible drafting units of this standard are: Luoyang Bearing Research Institute of the Ministry of Machinery Industry and Sichuan Dazhu Bearing Factory. The participating drafting units of this standard are: Sichuan Chuandong Bearing Factory and Sichuan Three Gorges Bearing Factory. The main drafters of this standard are: Xu Wenbao, Chen Liangyuan and Xie Zhaoju. h91
1 Scope
Machinery Industry Standard of the People's Republic of China
Rolling Bearings
Carbon Steel Deep Groove Ball Bearings
JB/T8570--1997
This standard specifies the dimensions, codes and technical conditions of deep groove ball bearings (hereinafter referred to as bearings) made of high-quality carbon steel for use under low speed and light load (such as push vehicles, appliance casters, sliding doors, and manual machinery). This standard is applicable to bearing manufacturing, production inspection and user acceptance. 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 are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 272---93
Rolling bearing code method
GB/T307.2-1995Principles and methods for measuring and testing rolling bearingsGB 699--88
GB 7811- -87
Technical conditions for high-quality carbon structural steel
Rolling bearing parameter symbols
G13 8579.-88
Rolling bearings, packaging
J13/T 3573-93
JB/T 3574-
JB/T 6641 - 93
Rolling bearings
Rolling bearings
Rolling bearings
JB/T 8566--- 1997
ZB JI1 020-- 89
3 Symbols
Measurement and evaluation method of radial clearance
Product marking
Residual magnetism and its evaluation method
Rolling bearing partsTechnical conditions for heat treatment of carbon steel bearing ringsInspection rules and technical standards for rolling bearings and their commercial partsThe symbols and their meanings used are in accordance with the provisions of GB7811. See Figures 1 to 3 and Tables 1 to 4 for the symbols.
Approved by the Ministry of Machinery Industry on April 15, 1997
Implemented on January 1, 1998
Figure 1 Carbon steel deep groove ball bearingWww.bzxZ.net
60000/CS type
4 Dimensions
JB/T 8570
Figure 2 Carbon steel deep groove ball auxiliary bearing with anti-vibration cover
60000.7./CS type
Figure 3 Carbon steel deep groove ball auxiliary bearing with dust cover
60000-27/0S to
The outer dimensions of the bearings shall be in accordance with the provisions of Table 1 and Table 2. If the subscriber requires the outer dimensions of the auxiliary bearings other than those specified in this standard, it can be determined through consultation with the manufacturer.
Table 102 series
Bearing code
60000/CS type
6200/CS
6201/CS
6202/CS
6203/CS
6204/CS
G205/CS
6206/CS
6207/CS
9208/CS
6209/cS
6210/CS
60000-Z/CS type
6200-Z/CS
6201 Z / CS | | tt | 210-Z/CS
60000-22/S type
6200-2Z/CS| | tt | tt||6209-22AS
6210-2Z-CS
60000/CS Type
6300/CS
6301/CS
6302/CS
6303/CS
6304/CS
6305/CS
6306/Cs
6307/CS
6308/CS
6309/CS
6310/CS
5 Code and marking
5.1 Code
Bearing code
60000-Z/CS type
6300-Z/CS
630 1-Z/CS | | tt | |6310-Z/CS
JB/T8570---1997
Table 203 series
60000-2Z/CS type
G300-2Z/CS
6301 2Z/CS
6302-2Z/CS
6303-2Z/CS
6304-2Z/CS
6305-2Z/CS
6306-2Z/CS
6307-22/CS
6308-2Z/CS
6309-2Z/CS
6310-2Z/CS
Inch/mm
Bearing codes are in accordance with the provisions of GB/T272, where the material code indicating that the bearing parts are made of carbon structural steel is represented by \/CS\. Example: 6205/CS represents deep groove ball bearing 6205 made of carbon structural steel. Note: Export bearing codes can be implemented according to the agreement between the supply and demand parties. 5.2 Marking
Marking example:
Carbon steel bearing 6205/CSJB/T8570---1997 indicates a carbon steel deep groove ball bearing that meets the requirements of this standard, with a size series of 02 and an inner diameter of 25 mm. 6 Technical requirements
6.1 Materials and heat treatment
The carbon structural steel used in bearing parts shall comply with the provisions of GB699. The rings are made of 45 steel, and the working surface hardness after heat treatment is not less than 50HRC. The steel balls are made of 10 or 15 steel, and the surface hardness after carburizing and quenching is not less than 60HRC. 6.2 Tolerances
Bearing tolerances are in accordance with the provisions of Tables 3 and 4.
Table 3 Inner ring
Nominal inner diameter
Includes 10 mm.
Upper deviation
Lower deviation
Upper deviation
Lower deviation
Nominal inner diameter
Surface roughness
Upper deviation
JB/T85701997
Lower deviation
The surface roughness of the bearing fit shall be in accordance with the provisions of Table 5. Table 5
Inner ring inner hole surface
Outer ring outer cylindrical surface
Flange end face
6.4 Clearance
Bearing radial clearance shall be in accordance with the provisions of Table 6.
Surface roughness
Table 6 Radial clearance
Nominal inner diameter d/mm
1) Including 10 mm
6.5 Appearance quality
Upper deviation
Ra/μm
Lower deviation
Gap/μm
Bearing parts are not allowed to have cracks. The working surface of the bearing is not allowed to have visible burns and scratches, and the appearance quality of the non-working surface shall comply with the regulations of the competent department of the manufacturer. Residual magnetism
The bearing should be demagnetized, and the maximum residual magnetism shall not exceed 0.8mT. 6.7 Bearing mark
The bearing mark shall comply with the provisions of JB/T3574. 6.8 Others
If the subscriber has special requirements for the bearing, it can be determined after consultation with the manufacturer. Testing method
The bearing tolerance shall be measured according to the method specified in GB/T307.2. 7.1
7.2 Hardness test of bearing parts shall be carried out according to the method specified in JB/T8566. The radial clearance of bearings shall be measured according to the load instrument measurement method specified in JB/T3573, with a measuring load of 49N. 7.3
JB/T 8570
7.4 Residual magnetism of bearings shall be measured according to the regulations of J13/6641. 1997
7.5 Appearance quality shall be inspected under a diffuse light. If there is any objection, it shall be inspected according to the regulations of Appendix A of JB/T8566~1997. 8 Inspection rules
Finished bearings shall be inspected by the quality management department of the manufacturer. Qualified bearings shall be accompanied by a quality certificate. 8.2 Bearings delivered to subscribers shall be inspected according to the procedures of 2BJ11020 using special inspection level S-4. The inspection items to be completed shall be as specified in Table 7: Qualified quality AQI value: Major inspection item 4.0, Minor inspection item 116.5 Table 7
Inspection items
Main inspection items
Inner ring inner diameter deviation and variation V
Outer ring outer warp and variation mV
Diameter clearance
Appearance quality of working surface
Rust prevention and packaging
Rust prevention and packaging of rail bearings shall be carried out in accordance with the provisions of GB8597
Minor inspection items
Inner and outer ring width deviation and variation.
Surface roughness
Residual magnetism
Appearance quality of working surface
Bearings should be guaranteed to be rust-free within 6 months from the time they are cleaned at the factory under normal storage conditions.
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