Grinding Media Grinding Balls | Union Process, Inc.
They are made by machine (standard) sizes 20mm–75mm. They are manually made (hit by air hammer) sizes 75mm–125mm. They have hardness 55–63 HRC. All forged balls are throughhardened, and shipped in 55gallon steel drums. They range in sizes from 20mm– lead time is 6–8 weeks FOB Akron, Ohio USA.