Standard No.:	JB/T 3122-2007
Chinese Name:	滚动轴承 滚针和推力球组合轴承 外形尺寸
English Name:	Rolling bearings-Combined needle roller bearings with thrust ball bearing-Boundary dimensions
Professional Classification:	J11 Rolling bearing
Professional Classification:	JB Professional Standard - Machinery
ICS Classification:	21.100.20 Rolling bearings
Issued by:
Issued on:	2007-03-06
Implemented on:	2007-09-01
Status:	VALID
Replace:	JB/T3122-1991
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	105 (USD)
Delivery:	via email in 1-3 business day

1. Scope

This standard specifies the boundary dimensions of four structural types of combined needle roller bearings with thrust ball bearing (hereinafter referred to as combined bearings).
Type NKX 00 - the combined needle roller bearings with thrust ball bearing (see Figure 1);
Type NKX 00 Z - the combined needle roller bearings with thrust ball bearings equipped with casing (see Figure 2);
Type NKX 00+IR - the combined inner ring needle roller bearings with thrust ball bearing (see Figure 3);
Type NKX 00 Z+IR - the combined inner ring needle roller bearings with thrust ball bearings equipped with casing (see Figure 4).