This standard specifies the structure, code method, dimensions and technical conditions of needle roller (including long cylindrical roller) and flat cage assemblies in linear motion rolling bearings. This standard applies to assemblies for production and inspection by manufacturers and selection and acceptance by users. JB/T 7359-1994 Linear motion rolling bearing needle roller and flat cage assemblies JB/T7359-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7359-94
Linear Motion Rolling Bearing
Needle Roller and Cage Assemblies
Published on July 26, 1994
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1995
Mechanical Industry Standard of the People's Republic of China
Linear Motion Rolling Bearing
Needle Roller and Cage Assemblies
1 Subject Content and Scope of Application
JB/T7359-94
This standard specifies the structure, code method, overall dimensions and technical conditions of needle roller (including long cylindrical rollers) and cage assemblies (hereinafter referred to as assemblies) in linear motion rolling bearings. This standard applies to assemblies for production and inspection by manufacturers and selection and acceptance by users. 2 Reference standards
GB/T8597
JB/T3034
JB/T3574
ZBJ11020
3 Symbols
High-quality carbon cable structural steel thin plate
Technical conditions
Rolling bearing packaging
Rolling bearing oil seal anti-rust packaging
Hydraulic bearing product logo
Inspection regulations for dynamic bearings and their product parts
I)w: Needle roller (long cylindrical roller) in the assembly (1) Nominal diameter of the needle roller (long cylindrical roller) B. Nominal width of the component
b; V-type component, in the transverse section, the distance between one end of the component and the other end of the needle roller L.. Maximum length of the component
Vs: Diameter variation of the component needle roller (long cylindrical roller) in a single plane Vtt Batch diameter variation of the component needle roller (long cylindrical roller) rw: Average diameter deviation of the component needle (long cylindrical roller) in a single plane 4 Code and structure type
4.1 Code
The code method of the component shall be in accordance with the provisions of Appendix A (supplement). 4.2 Structure type
This standard specifies the following two types of component structures: LNS-needle roller (long cylindrical roller) and single cage assembly (Figure 1): LNS-W double row needle roller (long cylindrical roller) and flat cage V-type assembly (Figure 2). Marking example:
Linear motion rolling bearing LNS10070WV
JB/T7359-94
Approved by the Ministry of Machinery Industry on July 26, 1994
Implemented on July 1, 1995
5 Dimensions
Complete
5.1 Single row, component dimensions according to Table 1. Component code
LNS3020
LNS5030V
LNS5023
LNS5038
LNS 7028
LNS10042V
LNS10060V
LNS10054
LNS10080
LNS200100V
LNS200120
JB/T7359-94
Dimensions
Note: The length of the components in the table is the maximum length. If the subscriber has special requirements, it can be determined in consultation with the manufacturer. 5.2 The dimensions of the double-row V-type components are as shown in Table 2. 2
Component code
LNS5035WV
LNS 5045 W
LNS10070WV
LNS10095W
LNS200120WVbzxz.net
JB/T7359-94
Note: The component length in the table is the maximum length. If the subscriber has special requirements, it can be determined through negotiation with the manufacturer. 6 Technical requirements
6.1 Tolerance and grade
The component tolerance grade is divided into 0 and 5 grades according to the tolerance of the needle roller (long cylindrical roller) in the component. The tolerance, grouping and combination code are as shown in Table 3. Table 3
Component grouping
Tolerance grade
Upper deviation
Lower deviation
Grouping code
Tolerance grade, component grouping combination code
6.2 Materials
6.2.1 Cage
The cage in the assembly shall be made of low-carbon high-quality steel plate in accordance with GB710. The surface of the cage shall be chemically treated or coated with metal.
6.2.2 Needle roller (long cylindrical roller)
Needle roller (long cylindrical roller) shall be made of high-carbon bearing steel (GCr15), and the hardness after heat treatment shall be 61~65HRC. 6.3 Appearance
The surface of the component shall not have cracks, rust, burrs or needle (long cylindrical roller) falling off. 6.4
Flexibility
The movement of the component should be flexible, and the needle roller (long cylindrical roller) can rotate freely in the cage, and no blocking is allowed. 6.5 Others
6.5.1 Other technical requirements not specified in this standard shall comply with the provisions of the product drawings. 6.5.2 When the user has special requirements, they can negotiate with the manufacturer to determine, 7 Inspection methods and inspection rules
7.1 Inspection method
7.1.1 Tolerance
The size and shape tolerance of the needle roller (long cylindrical roller) in the component is measured by the two-point method. 3
7.1.2 Rotational flexibility
JB/T7359-94
Place the component between two precision plates or rulers with similar shape and width to the component, and push it by hand. The distance is 1/2 of the length of the component. The component moves flexibly and the needle roller (long cylindrical roller) does not get stuck. 7.2 Inspection rules
7.2.1 The finished components shall be inspected by the quality department of the manufacturer. The products submitted to the subscriber must be accompanied by a quality certificate, which shall indicate: a.
Manufacturer name;
Component code:
Number of this standard:
Production batch number and date.
7.2.2 The subscriber acceptance inspection procedure shall refer to the provisions of ZBJ11020. The inspection items shall be in accordance with Table 4, with the general inspection level I, and the qualified quality level AQL value of 2.5 for major items and 6.5 for minor items. Table 4
Main inspection items
V Variation of the diameter of the component liquid needle (long-column exciton) in a single plane VWL Variation of the batch diameter of the component needle (long-column roller) Aowm Deviation of the average diameter of the component roller (long-column exciton) in a single plane Remote flexibility
8 Marking, packaging and storage
Secondary inspection items
8.1 Marking
Mark the tolerance grade and grouping code of the component at the lower end of the component (see Figure 3). The marking method, specifications and requirements shall comply with the provisions of JB/T3574.
8.2 Packaging and storage
The qualified components shall be cleaned, rust-proofed and inner packaged in accordance with the provisions of JB/T3034. The products that have completed the inner packaging shall be selected according to the actual length of the product and the storage and transportation conditions, and refer to the provisions of GB/T8597, and cartons and wooden boxes shall be used as outer packaging. After rust prevention and packaging, the product should be guaranteed to be rust-free within twelve months under normal storage and transportation conditions. The P51 grade should be guaranteed to be rust-free within twenty-four months. The rust prevention period is calculated from the date of leaving the factory. A1 Composition of component code
JB/T7359-94
Appendix A
Component code method
(Supplement)
The component code consists of two parts: the basic code and the supplementary code. A1.1 Basic code
The basic code is represented by letters and numbers, and consists of three parts: front, middle and back. Front part: The letters LNS are used to indicate that it belongs to the linear motion needle roller guide support type, and the rolling element is a needle roller (long cylindrical roller). Middle part: The external dimensions of the component are indicated by numbers, from left to right, indicating the nominal diameter of the needle roller (long four-column roller) in the component, the width and length of the component. The representation method is in accordance with Table A1.
Rear; indicates the structural features of the linear motion needle roller guide support, which is omitted for components and not indicated. Table A1
Component dimensions
A1.2 Supplementary code
Expressed in meters with 10 times or 210 times the nominal diameter (unit omitted) Expressed in its nominal digit (unit omitted) Except for the length specified in the standard, which can be omitted, the rest are expressed in meters with the nominal length "(unit omitted) Supplementary code uses letters and numbers to indicate component structure, material changes, component tolerance grade and grouping. The main supplementary codes are listed in Table A2: Component grouping and component tolerance grade, group combination code according to Table 3 of this standard. Table A2
A2 Code Example
V-type 90 °[Double-row needle roller (long column roller) structure] When the diameter of the hydraulic body in the component is expressed as 210D, it is flat. The cage material of the double-row needle roller (long column roller) structure is plastic
5 grade, grouped (0~-1jm)
Needle roller nominal diameter, component nominal width and length are 5mm and 38mm respectively, 1000mm linear motion needle roller guide support needle roller and flat cage assembly 5
5035/650
JB/T7359-94
V-type structure, with Dw to 5mm Flat guide rail components are used together, 0 level, group (0~-2m)
The nominal diameter of the needle roller, the nominal width and length of the component are 3.535mm, 35mm, 650mm respectively
Linear motion needle roller guide support needle roller and flat cage components JB/T7359-94
Appendix B
Technical requirements for needle roller and flat cage related parts (reference parts)
This appendix specifies the technical requirements for guide rails related to component applications, for subscribers to make guide rails. B1 material
Manufacture The guide rail can be made of high carbon chromium bearing steel GCr15, carbon tool steel T7~T10 or high quality carbon cable structural steel 55. B2
The working surface hardness of the guide rail should not be less than 58HRC (the surface hardening layer thickness is about 2mm). Surface roughness
The working surface roughness R of the guide rail is 0.8μm. Additional remarks:
This standard is proposed by the National Technical Committee for Standardization of Rolling Bearings. This standard is drafted by the Luoyang Bearing Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Xu Wenbao.
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