What are the differences between stainless steel ball and bearing steel ball?
One is made of stainless steel, not rusty, one is made of steel, it will rust
Stainless steel ball won't rust, bearing steel ball will rust
Stainless steel is not rust, steel minimum 304 aboveBearing steel will rust, but there is no protection of lubricating oil, its hardness and toughness are better than stainless steelSo stainless steel is suitable for surface
