JB/T 8878-2011Rolling bearings - Drawn cup needle roller bearings - Specifications (English PDF)
滚动轴承 冲压外圈滚针轴承 技术条件
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
December 20, 2011
Implementation date
April 1, 2012
Scope
JB/T 8878-2011 is the English-translated version of 滚动轴承 冲压外圈滚针轴承 技术条件.
Drawn cup needle roller bearings are covered by JB/T 8878-2011. The standard gives terms and definitions, symbols, technical requirements, testing methods, inspection rules, markings and anti-rust packaging, with informative appendices on the shafts and housing bores that receive the bearings and on a recommended installation method.
It covers general purpose drawn cup needle roller bearings without an inner ring that comply with GB/T 290-1998 and GB/T 12764-2009, and applies to their production, inspection and acceptance.
The standard replaces JB/T 8878-2001; it was issued on 20 December 2011 and implemented on 1 April 2012.
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Document preview — JB/T 8878-2011
National Standard of the People's Republic of China
- Replacing
- JB/T 8878-2001
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword3
- 1 Scope4
- 2 Normative references4
- 3 Terms and definitions5
- 4 Symbols (see Figure 1)5
- 5 Technical requirements6
- 5.1 Materials and heat treatment6
- 5.2 Tolerance6
- 5.3 Others7
- 6 Testing methods7
- 7 Inspection rules8
- 8 Markings8
- 9 Anti-rust packaging8
- Appendix A (Informative) Technical requirements for shafts and housing bores matched with bearings9
- A.1 Shaft matched with the bearing9
- A.2 Housing bores matched with the bearing9
- Appendix B (Informative) Recommended installation method10
1 Scope
This standard specifies the technical conditions for general purpose non-inner ring and drawn cup needle roller bearings (hereinafter referred to as bearings) which comply with the provisions of GB/T 290-1998 and GB/T 12764-2009.
This standard applies to the production, inspection and acceptance of bearings.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 290-1998 Rolling bearings - Needle roller bearings, drawn cup without inner rings - Boundary dimensions
GB/T 307.2-2005 Rolling bearings - Measuring and gauging principles and methods
GB/T 1957-2006 Tolerances and general features for plain limit gauges
GB/T 4199-2003 Rolling bearings - Tolerances - Definitions
GB/T 4340.1-2009 Metallic materials - Vickers hardness test - Part 1: Test method
GB/T 5213-2008 Cold rolled low carbon steel sheet and strip
GB/T 6930-2002 Rolling bearings - Vocabulary
GB/T 7811-2007 Rolling bearings - Symbols for quantities
GB/T 8597-2003 Rolling bearings - Rust proof packaging
GB/T 12764-2009 Rolling bearings - Needle roller bearings, drawn cup without inner ring - Boundary dimensions and tolerances
GB/T 24605-2009 Rolling bearings - Marking for products
Appendix A (Informative) Technical requirements for shafts and housing bores matched with bearings
A.1 Shaft matched with the bearing
A.1.1 The hardness of the journal's fit surface is not less than 58 HRC.
A.1.2 The maximum surface roughness of the journal's fit surface is Ra0.2 µm. A.1.3 The journal has a dimensional tolerance of h5 (h6).
A.1.4 The cylindricity of the journal's fit surface shall not exceed 50% of the dimensional tolerance of the shaft.
A.2 Housing bores matched with the bearing
A.2.1 The maximum surface roughness of the fit surface of the housing bore is Ra0.8 µm.
A.2.2 Dimensional tolerance of the housing bore is selected according to the material of the seat based on Table A.1. Table A.1
Materials of bearing seat Dimensional tolerance of bearing seat's bore Steel or cast iron Light alloy or wall thickness less than 6 mm N6 (N7) R6 (R7)
A.2.3 The cylindricality of the fit surface of the housing bore shall not exceed 50% of the dimensional tolerance of the housing bore. […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 290-1998Rolling bearings—Needle roller bearings with drawn cup and without inner ring—Boundary dimensions
- GB/T 307.2-2005Rolling bearings -- Measuring and gauging principles and methods
- GB/T 1957-2006Tolerances and general features for plain limit gauges
- GB/T 4199-2003Rolling bearings -- Tolerances -- Definitions
- GB/T 4340.1-2009Metallic materials - Vickers hardness test - Part 1: Test method
- GB/T 5213-2008Cold rolled low carbon steel sheet and strip
Similar standards
Editions of JB/T 8878
| Edition | Title | Revision | Status |
|---|---|---|---|
| JB/T 8878-2011 | Rolling bearings - Drawn cup needle roller bearings - Specifications | current edition | Current |
| JB/T 8878-2001 | Rolling bearings - Drawn cup needle roller bearings - Specifications | previous edition | Superseded |
This page sells the current edition, JB/T 8878-2011. Earlier editions are listed for reference only.
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Related Standards
GB/T 1957-2006 — Tolerances and general features for plain limit gauges
GB/T 24605-2009 — Rolling bearings - Marking for products
GB/T 307.2-2005 — Rolling bearings -- Measuring and gauging principles and methods
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