Standard No.:	JB/T 7048-2011
English Name:	Rolling bearing parts-plastic cage-specifications
Chinese Name:	滚动轴承 工程塑料保持架 技术条件
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:	MIIT
Issued on:	2011-12-20
Implemented on:	2012-4-1
Status:	valid
Superseding:	JB/T 7048-2002 Rolling bearing parts-plastic cage-specifications
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	100.0
Delivery:	via email in 1 business day

1 Scope This standard specifies technical requirements, test method, inspection rules, package, storage and transport of engineering plastic cages for rolling bearing (hereinafter referred to as cage). Moreover, this standard specifies technical specification of such engineering plastics for cage as glass fibre reinforced polyamide 66, polyamide 66, glass fibre reinforced polyamide 46 and polyamide 46. This standard is applicable to the production, inspection and acceptance of cages for bearings whose pitch diameter multiplied by bearing rotation speed is dmn<1.5×106mm•r/min and outside diameter D is less than 320mm. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the dated versions apply to this standard. For undated references, the latest edition of the normative document (include all the amendments) is applicable to this Document.

Contents I Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols 5 Common Structural Type 6 Technical Requirements 6.1 Materials 6.2 Tolerance 6.3 Diametral Tensile Strength σt 6.4 Surface Quality 6.5 Rotating Flexibility 6.6 Rolling Elements Retainability 6.7 Stabilizing Treatment 7 Testing Method 7.1 Tolerance Measurement 7.2 Test of Diametral Tensile Strength 7.3 Surface Quality Inspection 7.4 Rotating Flexibility Inspection 7.5 Inspection of Rolling Elements Retainability 8 Inspection Rules 9 Package, Storage and Transport Appendix A (Normative) Technical Specification of Engineering Plastic for Rolling Bearing Cage A.1 Scope A.2 Classification A.3 Technical Requirements A.4 Testing Method A.5 Acceptance Rules A.6 Package, Marking and Storage and Transport Appendix B (Normative) Test Methods of Diametral Tensile Strength of Cage B.1 Test Equipment and Tensile Force Clamp B.2 Condition and Test Environment of the Cage Sample B.3 Extraction of the Cage Sample B.4 Test Methods B.5 Calculation of Diametral Tensile Strength of Cage σt