JB/T 6365-1992 Technical conditions for linear motion rolling bearings, recirculating needle roller and roller guideway bearings JB/T6365-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T6365-92
Linear Motion Rolling Bearing
Circulating Needle Roller and Roller Guide Bearing
Technical Conditions
Published on 1992-07-15bZxz.net
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1993-01-01
People's Republic of China
Mechanical Industry Standard
Linear Motion Rolling Bearing
Circulating Needle Roller and Roller Guide Bearing
Technical Conditions
JB/T6365--92
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (P.O. Box 8144, Beijing 100081)
Copyright
Open This standard specifies the tolerance grades and technical requirements for circulating needle roller and roller guide bearings and circulating roller guide bearings (hereinafter referred to as guide bearings) manufactured in accordance with JB/T6364 "Linear motion rolling bearings, circulating needle roller and roller guide bearings - structural types and dimensions". This standard applies to the inspection and acceptance of guide rail supports by manufacturers and users. 2 Reference standards
GB1801
GB1804
GB4199
GB8597
ZBJ11020
JB3034
JB3574
JB/T6364
3 Symbols
Technical conditions for high-quality carbon structural steel
High-quality carbon cable structural steel thin steel plates and steel strips
Tolerances and fit dimensions Tolerance zones and fits of holes and shafts from inch to 500mm. Limit deviations of dimensions without tolerance notes. Definitions of rolling bearing tolerances
Rolling bearing packaging
Inspection rules for rolling bearings and their commodity parts. Rolling bearing oil seal anti-rust packaging
Rolling bearing marking specifications
Linear motion rolling bearings. Circulating needle roller and roller guide bearings. Structural types and dimensions. Except for the following symbols, the symbols cited in this standard are defined in GB4199. A: Deviation of the height of the rolling surface of the guide rail support (referring to the surface formed by the contact with the guide rail support, the same below) to the installation reference surface (for LRS0000SGK type, it is the support body reference surface, the same below); Vs.: The variation of the height of the moving surface of the guide rail support to the installation reference surface; AAmL: The deviation of the average height of the guide rail support rolling surface to the installation reference surface in the priority group; V: The variation of the guide rail support height group, in the same height group, the difference between the guide rail support with the highest average height of the rolling surface of the guide rail support to the installation reference surface and the guide rail support with the lowest average height; A: Deviation of the nominal height of the guide rail support;
At.: The deviation of the distance between the axis of the installation hole of the roller guide support and the support body reference surface; A%: Deviation of the nominal width of the guide rail support; ABa: Deviation of the width of the side ear of the needle guide support; A: Deviation of the distance between the two axial mounting holes of the guide rail support needle (roller); A: Deviation of the distance between the two mounting holes in the moving direction of the guide rail support; A: Deviation of the distance of the guide rail support needle (roller) protruding from the housing. Approved by the Ministry of Machinery and Electronics Industry on July 15, 1992 and implemented on January 1, 1993
JB/T6365—92
Figure 1LNS0000RN type
Figure 2LNS0000GRN type
JB/T6365—92
Figure 3LNS0000GRNU type
Figure 4LRS0000SG type
Figure 5LRS0000SGK type
4 Technical requirements
JB/T6365-92
4.1 Tolerance grades of guide rail supports
Guide rail supports are divided into ordinary grade (G), advanced grade (E), precision grade (D) and ultra-precision grade (C) according to the accuracy of the installation height. The tolerances are specified in Table 1.
Upper deviation
Lower deviation
Upper deviation
Lower deviation
Group code
Limit deviation
Ordinary grade
Note: For unspecified dimensional deviations, refer to the provisions of GB1804. 0
Ultra-precision grade
4.2 Materials
4.2.1 The body of the guide rail support is made of GCr15 steel. When the user has special requirements, other materials can be used in consultation with the manufacturer. 4.2.2 The impact shell is made of high-quality steel plates and steel strips specified in GB699 and GB710, and the surface should be chemically treated or coated with metal coatings; the end material of the guide rail support shall comply with relevant standards. 4.3 Hardness
The hardness of the installation surface of the guide rail support is 58~64HRC. Surface roughness
Surface roughness of guide rail support installation reference surface: ordinary and high-grade R. is 0.32μm; precision and ultra-precision R. is 0.2μum. Surface roughness R of other surfaces is 2.0um: 4.5 Appearance
The surface of the guide rail support should not have cracks, rust, burrs and needle (roller) drop. 4.6 Flexibility
The movement of the guide rail support should be flexible, and no blocking is allowed. 4.7 Interchangeability
Guide rail supports of the same group should be interchangeable without affecting the movement performance. 4
4.8 Marking
JB/T6365-92
For easy identification, each set of guide rail supports should have permanent markings. Mark the guide rail support code and manufacturer code (or trademark) on the side of the guide rail support. The marking requirements shall comply with the provisions of JB3574. 5.1 The measurement and evaluation of the roughness of the guide rail support installation reference surface shall be in accordance with the regulations of the competent department of the manufacturer. 5.2 The measurement of AAAAmL and VAml shall be measured by comparison with standard height samples. 5.3 The measurement principle of V. is shown in Figure 6. On a measuring plane, the rolling surface formed by the needle roller (roller) in the working state of the guide rail support is used as the reference surface. A precision measuring plate is placed on the guide rail support installation reference surface, and the guide rail support is moved in one direction (the moving distance is the nominal length L of the guide rail support). The difference reflected by the measuring instrument shall not exceed the specified value of V in Table 1. Figure 6
Measurement principle diagram
6 Inspection rules
The finished guide rail support should be inspected by the quality inspection department of the manufacturer. The products submitted to the user must be accompanied by a quality certificate, which should indicate:
a. Manufacturer name;
b. Guide rail support code;
c. This standard number;
d. Packaging date,
User acceptance inspection procedures should refer to the provisions of ZBJ11020. Inspection items are in accordance with Table 2. Take the general inspection level II, the qualified quality level AQL value is 2.5 for major items and 6.5 for minor items. Table 2
Main inspection items
A. Dimension deviation of height A
V Dimension variation of height A
Al Deviation of height priority grouping
VA Variation of height grouping
As, Ag Installation hole spacing deviation
. Distance deviation of needle roller (roller) protruding from the housing Movement flexibility
Rust prevention, packaging and storage
Minor inspection items
A% deviation of nominal height
Asa deviation of size B,
A% deviation of nominal width
Surface roughness
Qualified products should be rust-proofed and inner packaged in accordance with JB3034, and the markings on the packaging should be complete and clear. 5
JB/T6365-92
Products with inner packaging should be packaged in cartons or wooden boxes according to different storage and transportation conditions and in accordance with the provisions of GB8597. After rust prevention and packaging, the products should be guaranteed not to rust within 12 months under normal storage and transportation conditions, and precision and ultra-precision products should be guaranteed not to rust within 24 months. The rust prevention period is calculated from the date of leaving the factory. Additional notes:
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 of the Ministry of Machinery and Electronics Industry. This standard was drafted by Luoyin Bearing Research Institute of the Ministry of Machinery and Electronics Industry and Changshu Bearing Factory. The drafters of this standard are Zhang Hongjia, Feng Enguang and Xu Wenbao.
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