- Joined
- Mar 9, 2021
- Messages
- 189
McMaster Carr has 1.5mm bearings available in hardened 440C with an ASTM certificate. If I needed bearings for a Shiro, that's probably where I'd go rather than Amazon. Might be the same thing, but I'd just be more comfortable with the quality.Last month I quoted Tom, the Shiro rep, in these pages, regarding the Sergey and the Workshop's opinion on using ceramic bearing balls in their folders. I did a search to find the rest of Tom's response and found this opening line in his post,
"While I cannot go into exact details on the materials, our ball bearings are stainless, and are made from the steel that budget (but not budget-budget) knives have their blades currently made of."
I think that's about as forthcoming as Shirogorov is willing to be about the specific steel used, as they tend to keep specific details rather close to they vest.
Chuck is absolutely correct about the bearing size. The only caveat in ordering bearings might be their consistency of sizing as the Tom's quote in my earlier post infers that Shiro's tolerances for bearing size fall within a few microns.
Edit:
Country of origin = Japan
Diameter tolerance = +/- 2.5 microns