... Inspected by CMM 5.Smooth surface,Ra1.0 Center Plate Sand casting used for industrial clutch and brakes.1. Material: ASTM ... steel cover, piston, pressure plate, center plate, wear plate, cylinder, impeller, disc etc.3. Nearly 150 varieties of products. For example: Inspection1. The whole ... Ductile iron, alloy ironAluminumASTM A356, A360, A380, ADC12 etc. Center Plate Sand Casting for industrial clutch