... #,40Cr,40CrNi,etc 2.Weight:1.2kg 3.Hardness:HRC48-55 4.Application:Automotive High quality cnc machining forged steel spur gearOur Advantages ... , Sand blasting, Brushing & ploshing etc.3) Processing equipments:CNC machining center, CNC lathe, grinding machine, automatic lathe machine, conventional lathe machine, milling ...