SA系列
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Quick Inquiry
W2805SA-4Z-C5Z6 is an NSK Standard series SA (finished shaft ends) standard-stock precision ball screw: 28 mm shaft diameter, 6 mm lead, accuracy grade C5 (JIS), axial play 0 (preloaded), preload: Lead-offset preload (Z preload), with basic load ratings of Ca 20.6 kN (dynamic) and C0a 48.7 kN (static). Effective thread length approx. 500 mm class (code 05); confirm the overall length with NSK dimension tables or with Nahshon. W-reference standard-stock items are standardized with comparatively short lead times.
Not sure about accuracy grades? See our guide: How to choose ball screw accuracy grades (C0–C10) (in Chinese).
Other lengths with the same specification
The SA series with 28 mm shaft dia. × 6 mm lead is also available as: W2803SA-3P-C5Z6, W2803SA-4Z-C5Z6, W2805SA-3P-C5Z6, W2807SA-3P-C5Z6, W2807SA-4Z-C5Z6, W2809SA-3P-C5Z6, W2809SA-4Z-C5Z6, W2811SA-3P-C5Z6 and more — 9 models in total.
Customization
Shaft-end machining to your drawings is available. Add the part number (or your drawing) to the inquiry cart — Nahshon works directly with NSK to confirm specs, quotation and delivery.
| Specification | Unit | W2805SA-4Z-C5Z6 |
|---|---|---|
| Series | - | Standard series SA (finished shaft ends) |
| Shaft diameter | mm | 28 |
| Lead | mm | 6 |
| Effective thread length class | - | approx. 500 mm class (code 05) (overall length per NSK tables) |
| Accuracy grade | - | C5 (JIS) |
| Axial play | mm | 0 (preloaded) |
| Preload | - | Lead-offset preload (Z preload) |
| Basic dynamic load rating Ca | kN | 20.6 |
| Basic static load rating C0a | kN | 48.7 |
| Design serial no. | - | 4 (NSK internal design number) |
| Shaft ends | - | Finished (standard shaft-end form) |
Machine Tool (SA Type)・Standard series SA (finished shaft ends)
