R系列
NSK Distributor TaiwanProduct Features
Quantity
Quick Inquiry
RNCT 2005A2.5S is an NSK R-series rolled ball screw nut (V-groove nut with protruding recirculation tube): for 20 mm shaft diameter and 5 mm lead, accuracy grade Ct10, 2.5 effective ball turns, with seal (s), with basic load ratings of Ca 7.5 kN (dynamic) and C0a 14.2 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 20 mm shaft dia. × 5 mm lead: RNCT 2005A2.5, RNFBL 2005A2.5S, RNFTL 2005A2.5, RNFTL 2005A2.5S, RNSTL 2005A2.5S.
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 RS2005A - quote shaft and nut as a set; Nahshon can arrange cutting to length and shaft-end machining.
| Specification | Unit | RNCT 2005A2.5S |
|---|---|---|
| Series | - | R-series rolled ball screw nut / V-groove nut with protruding recirculation tube |
| Shaft diameter | mm | 20 |
| Lead | mm | 5 |
| Accuracy grade | - | Ct10 (R-series standard) |
| Effective ball turns | - | 2.5 |
| Seal | - | With seal (S) |
| Basic dynamic load rating Ca | kN | 7.5 |
| Basic static load rating C0a | kN | 14.2 |
| 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
