FK-FF 17WERB FK FF 17 Shaft Support Set Fixed and Floating Supports for 17 mm CNC Ball Screw The WERB FK FF 17 shaft support set provides a fixed FK block and a floating FF block for 17 mm CNC ball screws, ideal for compact but accurate CNC and automation axes. The pair works together to support the screw at both ends, controlling axial play at the drive side and guiding the free end for smooth rotation. As the authorised WERB ball screw supplier in Pakistan,