Standard No.:	JB/T 7359-2007
English Name:	Linear Motion Rolling Bearings-Linear Needle Roller and Cage Assemblies
Chinese Name:	直线运动滚动支承 滚针和平保持架组件
Chinese Classification:	J11    Rolling bearing
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Issued by:	NDRC
Issued on:	6-Mar-07
Implemented on:	2007-9-1
Status:	valid
Superseding:	JB/T 7359-1994
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	60.0
Delivery:	via email in 1 business day

Linear Motion Rolling Bearings-Linear Needle Roller and Cage Assemblies 1 Scope This standard specifies the structural types, designation methods, boundary dimensions and technical conditions of needle roller (including cylindrical roller) and cage assemblies (hereinafter referred to as “assemblies”) in linear motion rolling bearings. This standard is applicable to the production, inspection and customer acceptance of assemblies. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments to (excluding the corrections to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies. GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging GB/T 18254-2002 High-carbon Chromium Bearing Steel GB/T 13237-1991 Cold-rolled Quality Carbon Structural Steel Sheets and Strips JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel JB/T 3574-1997 Rolling Bearings-Marking for Products JB/T 8921-1999 Rolling Bearings and Commercial Parts - Inspection Rules JB/T 10335-2002 Linear Motion Rolling Bearings-Classification and Designation 3 Symbols Unless otherwise stated, the symbols shown in figures (excluding tolerance symbols) and the values given in the tables denote nominal dimensions. B: Width of assembly; Dw: Diameter of needle roller (cylindrical roller) in assembly; L: Length of assembly; b: The distance from one end of the assembly to anther end of the needle roller in the horizontal section of V-type assembly; VDwsp: The diameter variation of needle roller (cylindrical roller) in single plane in the assembly; VDwL: The diameter variation of a batch of needle rollers (cylindrical rollers) in assembly; △Dwmp: The average diameter deviation of needle roller (cylindrical roller) in single plane in the assembly . 4 Designation Methods and Structural Types 4.1 Designation Methods Designations of assemblies listed in this standard and their and meanings are detailed in JB/T 10335-2002. 4.2 Structural Types This standard specifies two structural types of assemblies: LNS…NC Single row needle roller (cylindrical roller) and cage flat assemblies (see Figure 1); LNS…NCW Double row needle roller (cylindrical roller) and cage V-type assemblies (see Figure 2).

Contents Foreword I 1 Scope 2 Normative References 3 Symbols 4 Designation Methods and Structural Types 4.1 Designation Methods 4.2 Structural Types 5 Boundary Dimensions 6 Technical Requirements 6.1 Material and Heat Treatment 6.2 Tolerance 6.3 Appearance 6.4 Flexibility 6.5 Others 7 Measurement Methods 7.1 Tolerances 7.2 Rotating Flexibility 8 Inspection Rules 9 Marking 10 Packaging and Storage 11 Technical Requirements for Assembly-associated Parts Appendix A (Informative) Technical Requirements for Assembly-associated Parts A.1 Materials A.2 Hardness A.3 Surface Roughness