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JR’s DS821 Digital Sport high-torgue design, features Above average torque (72 oz-in) and a longer-lasting gear train.


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Key Features

  • Lower price point, but higher performance value
  • New, longer-lasting plastic gear material
  • Same size as standard servo
  • Ball bearing-supported output shaft


The DS821 servo is a powerful, accurate sport digital servo recommended for RC airplane applications up to 1.20-size. For helicopters, the DS821 operates best with 30-size glow models, and up to 50-size electric. Loads and vibration in larger models may cause premature failure of the servo resulting in damage or injury to property and persons.

Detailed Information

Bearing: Single
Bushing Or Bearing: Bearing
Gear Material: Composite
Gear Type: Plastic
Motor Type: 3-pole ferrite
Digital or Analog: Digital
Servo Voltage: 4.8 - 6.0V
Speed: .19 sec/60° @ 4.8v .15 sec/60° @ 6v
Torque: 72 oz-in @ 4.8v 88 oz-in @6v

Parts Listing

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Optional Accessories

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