PDI-5521MG 20 kg Metal Gear Digital Standard Servo
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Prices updated: 13 Oct 2026
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About this product
A standard-size digital servo with high-precision metal gears and dual ball bearings, built for robotics, RC models and mechanical projects that need high torque. Stall torque is 17.25 kg·cm at 4.8 V and 20.32 kg·cm at 6 V. It uses a JR-type connector with a 260 mm lead.
Specifications
- Gear type
- Metal (high-precision)
- Stall torque at 4.8 V
- 17.25 kg·cm
- Stall torque at 6 V
- 20.32 kg·cm
- Operating speed at 4.8 V
- 0.18 sec/60°
- Operating speed at 6 V
- 0.16 sec/60°
- Dimensions
- 40.5 x 20.2 x 40 mm
- Weight
- 62 g
- Bearing
- 2BB (dual ball bearings)
Frequently asked questions
What voltage should I use for this servo?
The listed ratings are at 4.8 V and 6 V. Use a supply within this range that can deliver enough current during stall, because servos draw much more current under load than when idle.
What connector does it use?
It uses a JR-type connector on a 260 mm lead. Match the signal, power and ground wires to the labels on your controller or receiver before connecting.
