Cam follower materials and finishes are selected to provide a minimum
of friction and to assure dependable performance for the required service
Outer Race -- High-carbon chrome bearing steel, through-hardened
Inner Race -- Low-carbon alloy steel, carburized, and
deferentially hardened. A special heat treating process is used whereby
progressive differential hardness provides maximum strength in the
critically loaded raceway area. The threaded end is maintained in a softer
condition, therefore, providing the best characteristics of a strong bolt
which is subject to tensile, shear and bending stresses. The race and stem
are centerless ground.
Needle Rollers -- High-carbon chrome bearing steel,
through-hardened ground and lapped.
Retaining Washers -- Low-carbon alloy steel, case-hardened and
Proper cam follower mounting requires a snug fit between the stud and
housing bore. Where feasible, the recommended bore sized shown in the
dimensional tables should be followed. An arbor press is the preferred
means of stud installation with pressure applied to the central area, not
to the outer flange edges.
In positioning the cam follower, the end washer should be firmly backed
up by a flat housing shoulder or surface of the machine member which is
square with the center line of the stud. The shoulder should be at least
as large as the minimum boss diameter given in the tables. It is also
important that alignment be maintained between the bearing axis and the
cam or track surface to prevent edge loading of the bearing outer race.
The dimensional tables list the recommended torque to be applied to the
nut. Excessive torque, in particular with smaller sizes, may damage the
internal elements. If the threads or nut are lubricated, the torque value
should be reduced by one half.
TYPICAL STUD TYPE MOUNTING
MOUNTING, CAM YOKE
The mounting of cam yoke rollers should provide for endwise clamping to
prevent axial movement and displacement of the end washer. The washer
should be firmly backed up by a flat housing shoulder which is square with
the centerline of the bearing. The shoulder should be at least as large as
the minimum clamping diameter shown in the tables to provide adequate
The recommended shaft diameters listed in the dimensional tables
provide for either a slip or press fit. In heavily loaded applications,
the shaft should be heat treated and press fit in the bearing bore. With
moderate loads, a hardened shaft should be used but a slip fit is
sufficient. In lightly loaded applications, a slip or push fit may be used
with an unhardened shaft.
TYPICAL YOKE ROLLER