concentricity requires high,it reaches 0.02mm,special chosen material ，from self-lubricated ceramic material，in order to reduce friction & noise。It requires high cylindricity，reaches 0.004mm,diameter of cylinder tolerance reaches 0.002mm

With consummate production technique and advanced equipment, Suntech Advanced Ceramics is able to offer you high quality and high precision alumina or zirconia ceramic ball shaft products which are heat-resistant, hard-wearing and anti-corrosion. They are all on sale now. Come and wholesale cheap ceramic ball shaft from our factory.