Load Factor

When a radial or axial load has been mathematically calculated, the actual load on the bearing may be greater than the calculated load because of vibration and shock present during operation of the machine. The actual load may be calculated using the following equation:

F r = w · F rc
F a = f w · F ac

where

F r ,F a :	Loads applied on bearing (N)
F rc ,F ac :	Theoretically calculated load (N)
f w :	Load factor

The values given in the table are usually used for the load factor f w .

Values of Load Factor f w

Operating Conditions	Typical Applications	f w
Smooth operation free from shock	Electric motors, machine tools,air conditioners	1 ~ 1.2
Normal operation	Air blowers, Compressors, Elevators,Cranes, Paper making machines	1.2 ~ 1.5
Operation accompanied by shock and vibration	Construction equipment, Crushers, Vibrating screens, Rolling mills	1.5 ~ 3