forged steel ball, steel ball machine, steel ball grinding, milling steel .Jul 21, 2013 . Our customer produced diameter 40mm forged steel balls with our 150kg pneumatic forging hammer. It can be forged 8 steel balls per minute with the 150kg pneu.How to Make Precision Steel Balls | ActforlibrariesHow to make precision steel balls. The ball grinding and lapping machines were invented in Schweinfurt Bavaria, Germany by Friedrich Fisher in the late 19th Century. Schweinfurt was the target of some large bombing raids in 1943 designed to disrupt the production of ball bearings during WW II. Fisher designed this.
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