DIYbanter - View Single Post - Request for material recommendation for cam and roller follower with high contact stress

In article . com,
says...

It's difficult to make the cam thicker than 3/8" due to various
design constraints, but there is a small chance I could go to a
thickness of 7/16" or possibly =3F" at the very extreme. This would
give a maximum contact stress of 306,657.76 PSI & 286,852.07 PSI
respectively.

Most rolling bearings are made from AISI 52100, which is optimized for
heavy cyclical loads. At Rc60 or so it should be in the ballpark for
compressive strength; how long it'll hold up under cyclical loading at
300 ksi is another question. You may be better off looking for
information on the design of roller bearings where high cyclical
stresses are the norm. There's a wealth of experience predicting bearing
life vs. load which would be applicable to your problem.

Ned Simmons