ABSTRACT
T Applied moment load Nmm (lbin.) w Applied load per unit length N/mm (lb/in.)
W1 Weight of reciprocating parts N (lb)
W2 Weight of connecting rod including bearing assemblies N (lb)
W20 Weight of reciprocating portion of connecting rod N (lb)
W2’’ Weight of rotating portion of connecting rod N (lb)
W3 Weight of crank-pin and crank webs with
balance weights N (lb)
x Distance along shaft mm (in.)
Z Number of threads on worm, teeth on worm wheel
g Bevel gear cone angle 8, rad l Lead angle of worm at the pitch radius 8, rad f Gear pressure angle 8, rad c Gear helix angle 8, rad
The loading a rolling bearing supports is usually transmitted to the bearing through the shaft
on which the bearing is mounted. Sometimes, however, the loading is transmitted through the
housing that encompasses the bearing outer ring, for example, a wheel bearing. In either case,
and in most applications, it is sufficient to consider the bearing as simply resisting the applied
load and not as an integral part of the loaded system. This condition will be covered in this
chapter together with a definition of the loads transferred to the shaft-bearing system by some
common power transmission components.
