Page 611 - Rollingbearings

Design considerations
Design For less demanding applications, snap rings Combined needle roller bearings
can be used Otherwise, use an intermediate The diameter of the thrust bearing support
considerations ring, e g a spring steel washer, between the surface in the housing should be at least
snap ring and the cage assembly 0,5 mm larger than the dimension D or D
1
2
(ig. 41 and product tables of Needle roller /
For general information, refer to Bearing Needle roller bearings with thrust ball bearings, page 656, and Needle
interfaces, page 140 roller / cylindrical roller thrust bearings,
machined rings, without langes
page 658)
Appropriate abutment diameters are listed
in the product tables
Abutment Recommendations for surfaces of adja-
dimensions cent machine components that guide the
cage of needle roller bearings without
langes axially:
Needle roller and cage assemblies
• ine turned and polished
Appropriate abutment diameters are pro- • hardened and ground for high-speed
vided in table 15 operations
Recommendations for surfaces of adja- • no interruptions
cent machine components that guide needle
roller and cage assemblies axially: For less demanding applications, snap rings
can be used Otherwise, use an intermediate
• ine turned and polished ring, e g a spring steel washer, between the
• hardened and ground for high-speed snap ring and the cage assembly
operations
• no interruptions

7

Table 15
Abutment dimensions for needle roller and cage assemblies

U H12 � U H12 �
U U

d a E w D a F w Fig. 41
Abutment dimensions, combined needle
roller bearing

Needle roller and cage assembly Shaft abutment Housing abutment
Inside diameter
F w d a D a
> ≤
mm mm mm +0,5
D 1
+0,5
D 2
– 25 E w – 0,3 F + 0,4
w
25 65 E – 0,5 F w + 0,5
w
65 – E – 1 F w + 1
w

609