MT5 Medium Duty Live Center ~ Central spindle is made of hardened alloy steel and ground for high accuracy. ~ Precision high quality bearings with a combination of ball bearings and thrust bearings. ~ Dustproof seal on the front end. ~ Accuracy load of .0004". ~ Radial Load is 1,760 lbs. ~ Maximum RPM's is 2,000. ~ d is 1.77. ~ D is 3.0. ~ D1 is 1.748 ~ L1 is 1.77. ~ Overall length is 10.