NSK WBK17DF-31H ball screw support

NSK WBK17DF-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 WBK17DF-31H and any equivalents.

NSK ball screw support units hold the ends of a ball screw, keeping it axially fixed while it turns with very little friction. Machine tools, machining centers, automation equipment and linear positioning systems use them where axial rigidity and repeatability matter. MR Industrial Accessories supplies this NSK line to customers in the United States and Latin America.

The part number tells you what you are holding. WBK is the support family. The number after it is the nominal screw diameter in millimeters, so WBK17DF-31H fits a 17 mm screw and WBK20DF-31H fits a 20 mm screw, with sizes running up to WBK40DF-31H for a 40 mm screw. DF means a double-bearing arrangement with preload, and 31H identifies the fixing and sealing variant. Reading the code this way lets you confirm size and mounting type before you order.

You will find these units on milling machines, CNC lathes, grinding machines, machining centers, coordinate measuring machines and industrial automation equipment. Metalworking, automotive, food processing and machine tool operations rely on them to keep linear motion accurate. MR Industrial Accessories supports those sectors with fixing and support solutions.

Selection comes down to three things: screw diameter, whether the side is fixed or floating, and the load and speed conditions. During mounting, align the support with the screw shaft and set the bearing preload to the manufacturer's specifications. Correct lubrication and sealing against contaminants help the unit last. At high screw speeds, watch heat dissipation and the permissible axial clearance.

NSK supports interchange with other brands that use the same mounting standard and dimensions. For a replacement, compare shaft diameter, center height, hole spacing and fixing type. Send us the part number of another brand and we will point you to a compatible alternative, or quote the exact NSK number you need.

To get a quote, message us on WhatsApp with the full part number, such as WBK25DF-31H, or with the screw dimensions and mounting type. Our team replies promptly and can suggest equivalents and help you choose the variant that fits your machine.