KST DS215MG V8.0 HV Digital Metal Gear Micro Servo

The KST DS215MG V8.0 is a high-voltage digital micro servo for RC gliders and helicopters, and for any airframe that needs a fast servo in a small case. A coreless motor drives a hardened steel gear train inside a 23 × 12 × 27.5 mm aluminium alloy case, delivering up to 4.0 kgf·cm at 8.4 V.

Key features

• Fast transit: 0.050 s/60° at 8.4 V and 0.060 s/60° at 6.0 V.
• Hardened steel gears supported on two ball bearings.
• Programmable, with soft start so the servo does not snap to position at power-up.
• High-voltage supply only: 6.0–8.4 V, rated 7.4 V, so it runs straight from a 2S LiPo or an HV BEC.
• Light at 20 g, with five plastic horns and mounting screws included.

Specifications

• Model: DS215MG V8.0
• Operating voltage: 6.0–8.4 V DC (rated 7.4 V)
• Torque: 3.1 kgf·cm at 6.0 V; 3.7 kgf·cm at 7.4 V; 4.0 kgf·cm at 8.4 V
• Speed: 0.060 s/60° at 6.0 V; 0.055 s/60° at 7.4 V; 0.050 s/60° at 8.4 V
• Control signal: 1520 µs neutral, 333 Hz
• Default travel: ±70° (140° total)
• Motor: coreless DC
• Gears / bearings: hardened steel / 2 ball bearings
• Case: aluminium alloy, 23 × 12 × 27.5 mm (±0.2 mm)
• Weight: 20 g (±10%)
• In the box: 1 servo, 5 plastic servo horns, 1 horn screw, 4 mounting screws

Before connecting, check that your receiver or flight-controller servo rail sits within 6.0–8.4 V — a 5 V BEC is below this servo's operating range. The control signal is specified as 1520 µs neutral at 333 Hz, so set your PWM output to match.