Steel Ball Rolling Mill Machine Buy Steel Ball Rolling
5. forming good, geometric tolerances, quality stability. 6. low wear rate, long service life, is 2~5 times of the existing cast iron ball, forged steel ball, and the price is quite. 7. steel ball hardness up to 60~67HRC, internal and external hardness balance, hardness difference 5HRC. 8. impact toughness of up to 12~35J/cm3.