Product Features
Quantity
WBK20DF-31H is an NSK WBK high-speed / high-load support unit (fixed side, round, -31H series) for machine-tool feed axes and similar duties: angular contact thrust ball bearings (TAC) in a DF, 2-row face-to-face arrangement with 1,450 N preload, bearing bore 20 mm, basic dynamic load rating Ca 27,600 N and permissible static axial load 26,600 N. Used with WBK**L-31H lock nuts.
Other sizes of this type
WBK17DF-31H, WBK25DF-31H, WBK25DFD-31H, WBK30DF-31H, WBK30DFD-31H, WBK35DF-31H, WBK35DFD-31H, WBK35DFF-31H, WBK40DF-31H, WBK40DFD-31H, WBK40DFF-31H
Matching items
Complete-Set Selection
We recommend quoting support units and lock nuts together with your ball screw: include the screw part number (or shaft diameter) in your inquiry and Nahshon will match fixed- and support-side units and lock nuts per the official NSK shaft-end tables (E3162 B27–B30) — one quotation, one complete delivery.
| Specification | Unit | WBK20DF-31H |
|---|---|---|
| Series | - | WBK support units (machine tools, high speed and high load) |
| Side / shape | - | Fixed side, round |
| Bearings | - | Angular contact thrust ball bearings (TAC), DF, 2-row face-to-face |
| Bearing bore d | mm | 20 |
| Basic dynamic load rating Ca (axial) | N | 27,600 |
| Permissible static axial load | N | 26,600 |
| Preload | N | 1,450 |
| For precision ball screw shaft dia. (std. shaft end) | mm | 25、28 |
| Dimension table | - | NSK CAT. No. E3162 B395 (attached PDF) |
Support Units & Accessories・WBK support units (machine tools, high speed and high load)
