Engineered for high-demand RC cars, drift chassis, and scale aircraft, the KST DS1509MG combines a compact low-profile footprint with uncompromising torque and lightning-fast transit speeds. Delivering up to 12.8 kgf.cm of stall torque and a blistering 0.07s/60° response at 7.4V, this high-voltage coreless digital servo ensures razor-sharp steering precision, rapid centering, and reliable holding power under intense competitive conditions.

Key Features

• Low-Profile Form Factor: Compact 26.5mm height easily fits low-clearance RC car chassis and tight aircraft compartments.
• Coreless Motor Efficiency: Delivers rapid acceleration, smooth linear control, and instantaneous throttle-to-steering response.
• Hardened Steel Geartrain: Precision-cut steel gears supported by dual ball bearings minimize backlash and withstand heavy shock loads.
• Full CNC Aluminum Casing: Provides maximum structural rigidity and rapid thermal dissipation during extended runs.
• High-Voltage & Programmable: Compatible with 4.8V–7.4V systems with programmable parameters, including soft start.

Technical Specifications

• Operating Voltage: DC 4.8V – 7.4V (Rated: 7.4V)
• Motor Type: Coreless DC Motor
• Gear Set Material: Hardened Steel
• Case Material: CNC Aluminum Alloy
• Bearings: Dual Ball Bearings (2BB)
• Position Sensor: High-Precision Potentiometer
• Working Frequency: 1520μs / 333Hz
• Default Travel Angle: ±50° (100° Total)
• Operating Temperature: -10°C to +65°C
• Soft Start / Programmability: Yes (Programmable)
• Dimensions: 40.5 × 20.0 × 26.5 mm (±0.2mm)
• Weight: 55g (±10%)

Performance Ratings

• Stalling Torque:
  • 8.5 kgf.cm @ 4.8V
  • 10.7 kgf.cm @ 6.0V
  • 12.8 kgf.cm @ 7.4V
• Operating Speed (No-Load):
  • 0.10 sec/60° @ 4.8V
  • 0.08 sec/60° @ 6.0V
  • 0.07 sec/60° @ 7.4V

Dimensions & Sizing

Documentation

• DS1509MG Technical Specification