Standard No.:	GB/T 290-1998
English Name:	Rolling bearings—Needle roller bearings,drawn cup without inner rings—Boundary dimensions
Chinese Name:	滚动轴承 冲压外圈滚针轴承 外形尺寸
Chinese Classification:	J11    Rolling bearing
Professional Classification:	GB    National Standard
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Issued by:	State Quality and Technology Supervision Bureau
Issued on:	1998-08-12
Implemented on:	1999-7-1
Status:	superseded
Superseded by:	GB/T 290-2017 Rolling bearings-Needle roller bearings with drawn cup and without inner ring-Boundary dimensions
Superseded on:	2018-5-1
Abolished on:	2018-05-01
Superseding:	GB 290-1989 Rollings bearings--Needle roller bearings, drawn cup, without inner rings--Boundary dimensions
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 the boundary dimensions of diameter series 1 of drawn cup needle roller bearings without inner rings (hereinafter referred to as bearings). This Standard is applicable to the design, manufacture and user selection of drawn cup needle roller bearings. 2 Symbols and Abbreviated Terms (see Figures 1 and 2) Fw: Needle roller complement bore diameter; D: Drawn cup outside diameter; C: Drawn cup width; C1: End thickness of profiled end drawn cup; rs: Single chamfer dimension; rsmin: Smallest permissible single chamfer dimension; d0: Oil orifice diameter.

Contents Foreword I 1 Scope 2 Symbols and Abbreviated Terms (see Figures 1 and 2) 3 Boundary Dimensions 4 Designation