The KST CM12 is a compact coreless digital servo designed for RC aircraft and other RC models. It features a coreless DC motor, hardened steel gears, dual ball bearings, and a lightweight 22g design.
With a wide operating voltage range of 3.7–8.4V, the CM12 delivers up to 7.5 kgf·cm of torque and a speed of 0.08 sec/60° at 8.4V. Its plastic center case features three mounting options, with removable mounting tabs for greater installation flexibility. Measuring just 27 × 12.1 × 29.5mm, the CM12 is a practical metal gear servo for RC applications where space efficiency and versatile mounting options are important.
Features
- Coreless DC Motor
- Hardened Steel Gears
- Dual Ball Bearings (2BB)
- 7.5 Kgf·cm @ 8.4V
- 0.08 sec/60° Speed @ 8.4V
- 3.7–8.4V Operating Voltage
- Compact 27 × 12.1 × 29.5mm Design
- Lightweight 22g
- Potentiometer Position Sensor
Specification
- Item: CM12 Servo
- Rated Voltage: DC 6.0V
- Voltage Range: DC 3.7V-8.4V
- Torque: 3.80Kgf.cm@3.7V, 4.80Kgf.cm@4.2V, 5.80Kgf.cm@6.0V, 6.80Kgf.cm@7.4V, 7.50Kgf.cm@8.4V
- Speed: 0.16sec/60°@3.7V, 0.13sec/60°@4.2V, 0.10sec/60°@6.0V, 0.09sec/60°@7.4V, 0.08sec/60°@8.4V
- Working Frequency: 1520μs/333Hz
- Default Travel Angle: ±50° = 100° Total
- Temperature Range: -10℃……+65℃
- Case Material: Aluminum Alloy+ Plastic
- Motor Type: Coreless DC Motor
- Gear Set Material: Hardened Steel
- Position Sensor: Potentiometer
- Ball Bearing: 2BB
- Case Dimensions: 27*12.1*29.5mm±0.2mm
- Weight: 22g±10%

Package Includes
- 1 * CM12 Servo
- 2 * Servo Horn Screw
- 4 * Mounting Screw
- 1 * Plastic Screw Horn