The KST SV4012-12 is a high-performance low-profile brushless digital servo designed for RC cars, robotics, and compact high-load control systems. Engineered for strength and speed in tight spaces, it features a slim design while delivering outstanding torque and precision.

Powered by a 4-pole brushless motor, the SV4012-12 delivers up to 42Kgf.cm of torque at 13V with a swift 0.10sec/60° response time. This makes it a perfect fit for high-performance surface control in racing cars, industrial robotics, and advanced mechatronics.

With its rugged CNC-machined aluminum housing, hardened steel geartrain, and dual ball bearings, this servo is built for long-lasting precision even in the harshest environments. It supports a wide voltage range of 8.0V to 13.0V and is compatible with 2–3S LiPo battery direct input.

Features : 

• High Voltage Operation – Rated DC12V
• Supports 8–13V Input or 2–3S LiPo Battery Direct
• 4-Pole Brushless DC Motor
• Ultra High Torque: 42Kgf.cm @13V
• High Speed: 0.10sec/60° @13V
• Low Profile Design
• Programmable
• CNC-Machined Aluminum Alloy Case
• Hardened Steel Geartrain
• Dual Ball Bearings
• Ideal for RC Cars, Robotics, and Industrial Applications

Specifications : 

• Item: SV4012-12 Low Profile Brushless Servo
• Rated Voltage: DC 12V
• Voltage Range: DC 8.0V – 13.0V
• Torque: 32Kgf.cm@8.4V / 39Kgf.cm@12V / 42Kgf.cm@13V
• Speed: 0.14sec/60°@8.4V / 0.11sec/60°@12V / 0.10sec/60°@13V
• Working Frequency: 1520μs / 333Hz
• Travel Angle: ±60° = 120° Total
• Temperature Range: -20°C to +65°C
• Programmable: Yes
• Soft Start: Programmable
• Motor Type: 4-Pole Brushless DC Motor
• Gear Set Material: Hardened Steel
• Case Material: CNC Aluminium Alloy
• Position Sensor: Potentiometer
• Ball Bearings: 2BB
• Dimensions: 40 × 20 × 25 mm ±0.2mm
• Weight: 62g ±10%

Package Includes :

• 1 × SV4012-12 Brushless Low Profile Servo
• Servo Horns
• Mounting Screws
• Rubber Grommets
• Eyelets

The KST SV4012-12 is a professional-grade servo for competitive RC and industrial users who demand compact dimensions without compromising on torque, speed, or durability.