... .Inspected by CMM 5.Smooth surface,Ra1.0 Center Plate Sand casting used for industrial clutch and brakes. ... Railway fittings, ring flange , electromagnetic steel cover, piston, pressure plate, center plate, wear plate, cylinder, impeller, disc etc.3. Nearly 150 ... . Stable process;2. Disciplined peoples and operation;3. The best product features;4. Product performance;5. Advanced machining and inspecting ...