• Combination of double-row ball bearings, trust bearing and needle bearing. • Spindle was lengthened to achieve high clearance and reduce vibration. • High rigidity and high abrasion resistance. Shaft is made of alloy steel through heat treatment to RC 60-62. • Equipped with take-down nut, which could be pushed out from the cone for easy operation. • Dustproof seal is available on the front end to prevent the cutting fluid and dusty enter into bearing system, which has extended the service life of the center