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, and dual ball bearings, delivering reliable performance in a lightweight 22g design.

Operating at 3.7–8.4V, the CM12 provides 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 flexible installation.

With compact dimensions of 27 × 12.1 × 29.5mm, the KST CM12 is a versatile metal gear servo for RC applications requiring compact size, flexible mounting, and dependable performance.

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%

• 1 * CM12 Servo
• 2 * Servo Horn Screw
• 4 * Mounting Screw
• 1 * Plastic Screw Horn