Feetech SM-120B-C003 Brushless Modbus-RTU Servo, 120 kg·cm at 24 V

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SM-120B-C003 is a 24 V Modbus-RTU servo with a brushless motor, steel gears and an aluminium case.

Shipping: Free on every order
Duties and tariffs: In the price, nothing extra at checkout
Minimum order: 1 unit
In the box: Motor, gearing and driver included

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Free shipping On every order.
No tariffs at checkout Duties are in the price. Nothing to pay on delivery.
US seller of record US invoices, terms and support.
Maker's warranty Typically 12 months. Unused items can be returned within 30 days.

11.8 N·m

Torque (peak / max)

24 V

Supply voltage

Modbus-RTU (RS485)

Communication

0.485 kg

Weight

Specifications

Performance

Torque (peak / max): 11.8 N·m
Torque (rated): 3.92 N·m

Mechanical

Gear ratio: 232:1
Weight: 0.485 kg
Dimensions: 78 × 43 × 65.5 mm

Electrical

Supply voltage: 24 V
Rated current: 1 A

Interface

Encoder: Magnetic 12-bit
Communication: Modbus-RTU (RS485)

Environment

Operating temperature: -20 to 80 °C

Details

Angle: 360° (4096 steps)
Baud rate: 38400 bps-1 Mbps
Case: Aluminium
Gears: Steel
Motor: Brushless
No-load speed: 0.2 s/60° at 24 V
Stall current: 4 A
Stall torque: 120 kg·cm at 24 V

Specifications and photos are the maker’s published data. Download the datasheet (PDF).

Made by

Feetech

208 products

Typical applications

Desktop and education robot arms
Hexapods, quadrupeds and small humanoids
Pan-tilt heads and camera rigs
RC models and animatronics
Robot learning and teleoperation kits

Choosing the right one

Bus servos (TTL or RS485) chain on one cable and report position, speed, load, voltage and temperature; PWM servos need one signal wire each and report nothing.
Stall torque is the most the servo holds before it stops. Size the working load at a third to a half of stall torque.
Torque and speed are quoted at a supply voltage. Run the servo at that voltage to get them.
Magnetic encoders give 360° absolute position with no wear; potentiometer servos are limited to their angle range.
RS485 suits long cables and noisy machines; TTL suits short runs inside a robot. A USB adapter or driver board connects either to a PC.

About this product

Stall torque is 120 kg·cm (11.8 N·m) at 24 V and no-load speed is 0.2 s/60°. Working angle is 360° (4096 steps) with a 12-bit magnetic encoder, and the servo reports position, speed, load, voltage, current and temperature.