---
title: "Waveshare SC15 specs"
description: "Smart Servo actuator from Waveshare (Feetech OEM) (China). Peak torque 1.7 Nm, rated n/a, weight 70 g, torque density 23.9 Nm/kg, price $17.99."
canonical: https://actuatorlist.com/actuators/waveshare-sc15
last-updated: 2026-11-01T14:05:43.000Z
---
# SC15 Serial Bus Servo (17 kg.cm) by Waveshare (Feetech OEM)

> Smart Servo actuator from Waveshare (Feetech OEM) (China). Peak torque 1.7 Nm, rated n/a, weight 70 g, torque density 23.9 Nm/kg, price $17.99.

## Specifications

| Spec | Value |
| --- | --- |
| Category | Smart Servo |
| Peak torque | 1.7 Nm |
| Rated torque | n/a |
| Max speed | 62 rpm |
| Gear ratio | n/a |
| Weight | 70 g |
| Torque density | 23.9 Nm/kg |
| Price | $17.99 |
| Price per Nm | $10.8 |
| Backdrivable | n/a |
| Backlash | n/a |
| Voltage | 4.8-8.4 V |
| Peak current | 1.7 A |
| Communication | TTL |
| Control modes | position, velocity |
| Encoder | potentiometer, 10-bit (1024 steps over 180 deg) |
| Integrated driver | yes |
| Availability | in production |
| Data status | Catalog headline specs spot-checked: confirm revision |

## Size a joint

- [Motor torque calculator](/tools/motor-torque-calculator?solve=power&t=1.67&n=62): **10.8 W** of shaft power at its peak 1.67 N·m and 62 rpm.
- [Robot arm torque calculator](/tools/robot-arm-torque-calculator?L=0.4,0.35,0.12&m=1.2,0.8,0.3&a=0.07,0.5,0&p=2): **30.3 N·m** at the shoulder with its 70 g at the elbow of a 2 kg-payload arm.

## Use cases

- robot arm

## Notes

Lower-cost Waveshare/Feetech bus servo with potentiometer feedback (180 deg servo / 360 deg motor mode). Stall torque 14 kg.cm @4.8V, 15 kg.cm @6V, 17 kg.cm (1.67 N.m) @8.4V; no-load ~62 rpm (0.16 s/60 deg) @6V; stall current 1.7A. Price $17.99 is Waveshare's own single-unit price, checked Oct 2026.

## Sources

- [https://www.waveshare.com/sc15-servo.htm](https://www.waveshare.com/sc15-servo.htm)
- [https://servodatabase.com/servo/waveshare/sc15](https://servodatabase.com/servo/waveshare/sc15)

## Similar Smart Servo actuators

- [PH54-200-S500-R (Dynamixel-P / Pro+) (Robotis (Dynamixel))](https://actuatorlist.com/actuators/dynamixel-ph54-200-s500-r): 85.4 Nm/kg
- [STS3250 (12V, 50 kg.cm) (Feetech)](https://actuatorlist.com/actuators/feetech-sts3250): 65.8 Nm/kg
- [XM540-W270-T (Robotis (Dynamixel))](https://actuatorlist.com/actuators/dynamixel-xm540-w270-t): 64.2 Nm/kg
- [XH540-W270-T (Robotis (Dynamixel))](https://actuatorlist.com/actuators/dynamixel-xh540-w270-t): 60 Nm/kg
- [STS3215 (12V, 30 kg.cm) (Feetech)](https://actuatorlist.com/actuators/feetech-sts3215): 53.5 Nm/kg

## Machine-readable

- JSON: https://actuatorlist.com/api/v1/actuators/waveshare-sc15
- Catalog index for agents: https://actuatorlist.com/llms.txt