R系列
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RNCT 2806A5S is an NSK R-series rolled ball screw nut (V-groove nut with protruding recirculation tube): for 28 mm shaft diameter and 6 mm lead, accuracy grade Ct10, 5 effective ball turns, with seal (s), with basic load ratings of Ca 15.9 kN (dynamic) and C0a 40.5 kN (static). This is a nut-only item (screw shaft not included), used with NSK RS-series rolled screw shafts for economical transfer drives.
Not sure about accuracy grades? See our guide: How to choose ball screw accuracy grades (C0–C10) (in Chinese).
Other nut models for the same shaft dia. × lead
Other nut models for 28 mm shaft dia. × 6 mm lead: RNCT 2806A5, RNFBL 2806A2.5S, RNFBL 2806A5S, RNFTL 2806A2.5, RNFTL 2806A2.5S, RNFTL 2806A5, RNFTL 2806A5s, RNSTL 2806A2.5S and more — 9 models in total.
Customization
This is a nut-only item, used with the matching RS-series rolled screw shaft; shaft ends can be machined to your drawings. Add the part number (or your drawing) to the inquiry cart — Nahshon works directly with NSK to confirm specs, quotation and delivery.
Matching Shaft
This nut matches shaft RS2806A - quote shaft and nut as a set; Nahshon can arrange cutting to length and shaft-end machining.
| Specification | Unit | RNCT 2806A5S |
|---|---|---|
| Series | - | R-series rolled ball screw nut / V-groove nut with protruding recirculation tube |
| Shaft diameter | mm | 28 |
| Lead | mm | 6 |
| Accuracy grade | - | Ct10 (R-series standard) |
| Effective ball turns | - | 5 |
| Seal | - | With seal (S) |
| Basic dynamic load rating Ca | kN | 15.9 |
| Basic static load rating C0a | kN | 40.5 |
| Internal design code | - | A (NSK internal design code) |
| Mating screw shaft | - | RS-series rolled screw shaft (sold separately) |
Transfer Equipment (R Type)・R-series rolled ball screw nut / V-groove nut with protruding recirculation tube
