---
title: "Smart-FLEXWAVE SRH series (smart strain-wave reducer) by Nidec Drive Technology (Nidec-Shimpo): specs, torque and price"
description: "Harmonic / Precision actuator from Nidec Drive Technology (Nidec-Shimpo) (Japan). Peak torque n/a, rated n/a, weight n/a, torque density n/a, price quote only."
canonical: https://getactuators.com/actuators/nidec-smart-flexwave-srh
last-updated: 2026-09-26T20:29:50.000Z
---
# Smart-FLEXWAVE SRH series (smart strain-wave reducer) by Nidec Drive Technology (Nidec-Shimpo)

> Harmonic / Precision actuator from Nidec Drive Technology (Nidec-Shimpo) (Japan). Peak torque n/a, rated n/a, weight n/a, torque density n/a, price quote only.

## Specifications

| Spec | Value |
| --- | --- |
| Category | Harmonic / Precision |
| Peak torque | n/a |
| Rated torque | n/a |
| Max speed | n/a |
| Gear ratio | 50:1-160:1 |
| Weight | n/a |
| Torque density | n/a |
| Price | quote only |
| Price per Nm | n/a |
| Backdrivable | no |
| Backlash | 0 arcmin |
| Voltage | n/a |
| Peak current | n/a |
| Communication | n/a |
| Control modes | n/a |
| Encoder | integrated (built-in torque and temperature sensing) |
| Integrated driver | no |
| Availability | in production |
| Data status | unverified |

## Use cases

- humanoid joint
- cobot joint
- robot arm

## Notes

Smart-FLEXWAVE (SRH / WPU-SRH-BD) is Nidec Drive Technology's ultra-thin, lightweight zero-backlash strain-wave 'smart reducer' with a built-in sensor that detects output torque and internal temperature, aimed at humanoid and cobot joints. The BD safety variant carries TUV SUD functional-safety certification. It is a reducer-with-sensor module (no integrated motor or drive), so torque/electrical/comms fields are left null pending a primary datasheet with per-size numbers. backdrivable set to false, consistent with high-ratio strain-wave gearing. Zero-backlash recorded as 0. Quote-only pricing.

## Sources

- <https://www.nidec-dtc.com/product/srh-series-wpu-srh-bd/>
- <https://www.nidec-dtc.com/wp-content/uploads/2025/10/Smart-FLEXWAVE_Catalog_A1-2025.pdf>
- <https://www.nidec.com/en/products/news/2024/news1225-01/>
- <https://www.nidec-dtc.com/smart-flexwave-wpu-srh-hollow-shaft-unit/>

## Similar Harmonic / Precision actuators

- [LPA-20 (Low Profile Rotary Actuator) (Harmonic Drive LLC)](https://getactuators.com/actuators/harmonic-drive-lpa-20): 40.7 Nm/kg
- [FHA-14C-100 (FHA-C Mini) (Harmonic Drive LLC)](https://getactuators.com/actuators/harmonic-drive-fha-14c-100): 17 Nm/kg
- [SHA-CG series (SHA-CG Hollow Shaft Actuator) (Harmonic Drive LLC)](https://getactuators.com/actuators/harmonic-drive-sha-cg): n/a
- [CHA series (Hollow Shaft Servo Actuator) (Harmonic Drive (Harmonic Drive SE / LLC))](https://getactuators.com/actuators/harmonic-drive-cha-series): n/a
- [LHS series (Harmonic Drive strain-wave reducer) (Leaderdrive (Suzhou Leader Harmonic Drive))](https://getactuators.com/actuators/leaderdrive-lhs): n/a

## Machine-readable

- JSON: https://getactuators.com/api/v1/actuators/nidec-smart-flexwave-srh
- Catalog index for agents: https://getactuators.com/llms.txt