Page 115 - The Tribology Handbook

A20 Selection of rolling bearings

SELECTION OF TYPE OF BEARING REQUIRED

Table 20.1 Guide for general application

Sealed (Se) Load capability Allowable Coej%imt
Design of Bearing bore or misalignment of Bearing
bearing section
shielded (S) Radial Axial friction(')
Single row deep Cylindrical 1 or 2 Se Light and Light and 0.01 to 0.05 0.0015
groove ball 1or2S medium medium

Self-aligning Cylindrical 2 S Light and Light 2 to 3 0.0010
double row or tapered medium
ball
Angular contact Cylindrical - Medium") Medium and - 0.0020
single row heavy
ball
~~
Angular contact Cylindrical - Medium Medium - 0.0024
double row
ball
Duplex Cylindrical - Light'" Medium - 0.0022

Cylindrical roller Cylindrical - Heavy -( 3 ) 0.03 to 0.10 0.001 1
single row

Cylindrical Cylindrical - Heavy - - 0.001 1
roller, double
row
Needle roller Cylindrical - Heavy - - 0.0025
single row R

Tapered roller Cylindrical - Heavy"' Medium and - 0.0018
single row heavy

Spherical roller Cylindrical - Very heavy Light and 1.5 to 3.0 0.0018
double row or tapered medium

Thrust ball Cylindrical - - Light and - 0.0013
single row medium

Angular contact Cylindrical - - Medium - 0.0013
thrust ball
double row
~ ~~~~~ ~~~
Spherical roller Cylindrical - Not exceed 55% Heavy 1.5 to 3.0 Refer to
thrust of simultane- manu-
ously acting facturer
axial load

Information given in this chart is for general guidance only. (5) The friction coefficients given in this table are approximate
(1) Must have simultaneously acting axial load or be mounted and will enable estimates to be made of friction torque in
against opposed bearing. different types of bearings.
d
-
(2) Must carry predominant axial load. Friction torque = p P- 10 Nm
(3) Cylindrical roller bearings with flanges on inner and outer 2
rings can carry axial loads providing the lubrication is Where P = bearing load, N
adequate.
d = bearing bore diameter, mm
(4) The degree of misalignmentrrmitted is dependent on internal p = friction coefficient.
design and manufacturers s odd be consulted.
A20.2