MT4 Live Center with Revolving Body ~ One piece central spindle and revolving body is made of hardened alloy steel. ~ Ground for high accuracy. ~ Precision, high-quality bearings. ~ Combination of ball bearings and thrust bearings. ~ Dust-proof seal. ~ Accuracy load is .0002″. ~ Radial load is 1,200. ~ Maximum RPM is 5,000. ~ Concentricty is within .0002″. ~ A is 40mm. ~ B is 60mm. ~ C is 108mm. ~ D is 63mm. ~ D1 is 35mm. ~ L is 211mm. One piece central spindle and revolving body is made of hardened alloy steel. Ground for high accuracy. Precision, high-quality bearings. Combination of ball bearings and thrust bearings. Dust-proof seal.