Linear Ball Bearing, Type Closed, Inside Dia. 30 mm, Outside Dia. 47 mm, Material Delrin, Accelerated Speed 150 mm/sec, Between Grooves (mm) 51.7 mm, Dimension C1 51.7 mm, Dimension T 30, Dynamic Load Capacity (N) 8,300 N, For Use With Thomson Shafting, Inside Dia. Tolerance + .013, Maximum Operating Temperature 185 Degrees F, Minimum Operating Temperature 0 Degrees F, Length (In.) 68 mm, Seal -