Linear Ball Bearing Type Closed Inside Dia 3/4 in Outside Dia 1 1/4 in Material Delrin Accelerated Speed 450 fps Between Grooves (mm) 1.27 in Dimension B - Dimension C 1.625 in Dimension C1 1.27 in Dimension C2 - Dimension d - Dimension E - Dimension F - Dimension G - Dimension T 0.75 Dynamic Load Capacity (N) 600 lbf For Use With Thomson Shafting Inside Dia Tolerance +/-.001 Maximum Operating Temperature 185 Degrees F Minimum Operating Temperature 0 Degrees F