I know about CRS, O-1 and D-2 that I have used for years. I have an application to make a part that will be 6" long, 1" high and 3/4" thick. The part will hold a carbide that will cut 3 pcs. .115x.017" tempered flat wire. The part will be cam driven on one end and pivot with a 3/4" shaft in the middle on Timken bearings. The area around the shaft is bigger. Imagine a rocking action. The cam is twice the distance from the pivot as the carbide so a 2 to 1 ratio. I wonder what steel to use to make the part from that will be super strong and stiff yet still be able to machine the part. Should it be tool steel and hardened? Or some cryptic alloy number? The cam is a bearing running in eccentric so a wear surface isn't critical. The last version I made of this was CRS and that was a mistake in the long run, too much deflection and deformation, the carbide pushed it around like wet clay and the 3/4" shaft wowed the bore at the pivot even though it was shrunk fit and taper pinned. I did get over 3 million operations from it though.
- posted
18 years ago