A precision 40 degree angular contact ball bearing, sealed & lubricated for life, carries both the thrust load and rear radial load.Combined with a precision radial bearing in the nose, this two bearing setup will deliver long lasting service and accuracy. The tip of the center extends and reverses to accommodate your turning. The flat end is useful when reverse chucking using a vacuum chuck or jam chuck. The center will support the work without marking the bottom of the piece. The cup center is threaded 3/4‐10 for standard accessories. A 5/16” thru hole accommodates drilling. #2 Morse Taper shank is tapped 3/8-16 for draw bar applications. The center body and shank are plated for corrosion resistance.