NSK WBK40DFF-31H ball screw support

NSK WBK40DFF-31H belongs to ball screw support, part of our Linear motion range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for WBK40DFF-31H and any equivalents.

The NSK WBK DFF is a ball screw support unit that holds and locates the screw end on machine tools and automation axes. Inside, pre-adjusted angular contact bearings carry axial and radial loads with high rigidity, so the screw stays aligned. Typical installations include machining centers, CNC lathes, grinding machines and linear positioning systems that depend on repeatable motion.

Reading the code helps you order correctly. WBK is the support family; the two digits after it give the shaft diameter the unit fits, as in WBK35DFF-31H and WBK40DFF-31H; DFF covers how the unit is sealed and fastened; the trailing -31H marks a construction variant. Match the screw diameter, the bearing type the housing accepts and the fastening method your application calls for.

You will find these units on vertical and horizontal machining centers, CNC lathes, precision grinders and high-accuracy positioning tables, as well as on coordinate measuring equipment, EDM machines and automated handling systems. Whenever the screw has to turn with minimal vibration and axial drift, a support of this type is part of the design.

Selection starts with the screw diameter and the bearing type the head takes. The DFF version normally brings sealing that keeps lubrication in and contamination out, which matters where chips or coolant are present. The unit has to line up with the screw axis and with the support at the opposite end; misalignment shows up as parasitic load and early wear. Relubricate to the bearing specification and the duty cycle.

Equivalent references from other precision component makers can often be used instead, as long as shaft diameter, bearing type, fastening arrangement and mounting dimensions agree. Never assume this without checking: compare drawings and confirm preload and rigidity. If you only have another brand's code or an unidentified part, send it over and we will quote it and point you to the compatible option.

For a quote, message the full support code on WhatsApp, for example WBK35DFF-31H or WBK40DFF-31H, together with the screw diameter and the machine type. Ask as well about other references in the NSK line or equivalent components.