... .002mm 6.Angle clearance:R0.03mm Item Mass production machining block Material Steel ,Stainless steel, Iron ,Aluminum, Brass and etcMaterial standard ... ,grinding,boring,stamping,threading, tamping and etc.Production equipmentInstrument lathe, CNC lathes machine , CNC milling machine , Milling machine , Grinding machine , Tapping machine , Thread rolling machine , Drilling machine, Stamping machine ...