1.Product Overview The THK BF2- is a square-type fixed-end or supported-side ball screw support unit designed for a 20mm shaft diameter, utilizing a deep-groove ball bearing to stabilize rotating machine components 👉 Get a quote within 24 hours for your project 2.Technical Specifications Model: BF 20 Inner Diameter (ID): 20 mm Outer Diameter (OD): 26 mm Width: 88mm Structure: Ball screw side support Cage: Steel cage Clearance Class: C3 enlarged radial clearance Design: