Product Features
Quantity
WBK40DFD-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 DFD, 3-row arrangement with 3,900 N preload, bearing bore 40 mm, basic dynamic load rating Ca 65,000 (40,000 when loaded in a line) N and permissible static axial load 104,000 (52,000 when loaded in a line) N. Used with WBK**L-31H lock nuts.
Values in parentheses apply when the axial load is applied in a line - see Note 4, E3162 B395.
Other sizes of this type
WBK17DF-31H, WBK20DF-31H, WBK25DF-31H, WBK25DFD-31H, WBK30DF-31H, WBK30DFD-31H, WBK35DF-31H, WBK35DFD-31H, WBK35DFF-31H, WBK40DF-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 | WBK40DFD-31H |
|---|---|---|
| Series | - | WBK support units (machine tools, high speed and high load) |
| Side / shape | - | Fixed side, round |
| Bearings | - | Angular contact thrust ball bearings (TAC), DFD, 3-row |
| Bearing bore d | mm | 40 |
| Basic dynamic load rating Ca (axial) | N | 65,000 (40,000 when loaded in a line) |
| Permissible static axial load | N | 104,000 (52,000 when loaded in a line) |
| Preload | N | 3,900 |
| For precision ball screw shaft dia. (std. shaft end) | mm | 50 |
| Dimension table | - | NSK CAT. No. E3162 B395 (attached PDF) |
Support Units & Accessories・WBK support units (machine tools, high speed and high load)
