Page 271 - Tribology in Machine Design

256 Tribology in machine design

For deep-groove and angular-contact bearings

For roller-bearings with point contact at one race and line contact at the
other

where / is the length of the contact.
For roller-bearings with line contact at both raceways

With axial load, the corresponding equations are

All deflections are in metres and are for zero-clearance bearings. The load
on the most heavily loaded rolling element, P, is in Newtons, and the rolling
element diameter, d, is in metres.

7.4. Kinematics of 7.4.1. Normal speeds
rolling-contact bearings
The relative motion of the separator, the balls, and the races of a ball-
bearing is an important study towards the understanding of the perform-
ance of this type of bearing. If C0j is the angular velocity of the inner race,
then the velocity of point A, Fig. 7.11, is

Similarly, if co 0 is the angular velocity of the outer race, then the velocity of
point C is

Figure 7.11