JR DS821 - Digital Sport High Torque Servo


Modulation: Digital
Torque: 4.8V: 72.00 oz-in (5.18 kg-cm)
6.0V: 88.00 oz-in (6.34 kg-cm)
Speed: 4.8V: 0.19 sec/60°
6.0V: 0.15 sec/60°
Weight: 1.50 oz (42.5 g)
Dimensions: Length:1.50 in (38.1 mm)
Width:0.74 in (18.8 mm)
Height:1.47 in (37.3 mm)
Motor Type: 3-pole
Gear Type: Plastic
Rotation/Support: Single Bearing
Rotational Range: (add)
Pulse Cycle: (add)
Pulse Width: (add)
Connector Type: JR
JR DS821
Brand: JR
Product Number: JRPS821
Typical Price: 29.99 USD
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Reviews of JR DS821 (6)

  • Rating:

    Application(s): Thunder Tiger Raptor 30 V2

    Comments: Used as my cyclic servos, and for my collective. When rebuilding the output gear on the collective servo broke clean off. I don't know if it's user error or not.

  • Rating:

    Application(s): Sig Kadet Mark II w/OS 46LA

    Comments: I lost my plane on the 3rd flight , doing a Loop with a Snap Roll on Top ,, lost the Elevator 75% of the way thought the loop and it flow in to the ground .. Out put shaft of the DS821 snapped , I used NO lock Tight or any thing else on it Will never use a DS821 ever again

  • Rating:

    Application(s): All around except throttle, OMP Yak

    Comments: First servos I ever bought, six plus years now, sent them in a year ago and they all checked out fine. Recently bought more to replace Hitecs, my 5245 jammed and crashed my plane, no more Hitec for me.

  • Rating:

    Application(s): Seagull Edge 540, OS120, throttle servo

    Comments: I lost a nice Seagull edge 540 when the throttle servo
    gears jamed and it pulled the battery voltage down
    to 3.5v, causing the other servos to wander around
    aimlessly. I wouldn't recomend this servo on anything.
    I'm also switching to Hitec servos in the future.

  • Rating:

    Application(s): Extra 330 68" span all EX rudder

    Comments: good nice servo for the price NEVER USE THREAD LOCK it kills the gears. good sports servo not doing 3D so no need for silly fast speeds. done 50 flights with them now with no problems and still tight..

  • Rating:

    Application(s): for my invention

    Comments: Very good servo. Powerful and fast.

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