1.Product Overview The THK BF15 is a square-type fixed-end or supported-side ball screw support unit designed for a 15mm 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 15 Inner Diameter (ID): 15 mm Outer Diameter (OD): 20 mm Width: 70mm Structure: Ball screw side support Cage: Steel cage Clearance Class: C3 enlarged radial clearance Design: