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Description: This beast is the Hitec HS-805BB servo. Able to take in 6 volts and deliver an impressive 343 oz-in. of maximum torque at 0.14 sec/60°, this is a heavy duty servo and is not to be taken lightly!

This high quality servo is perfect for your mechatronic needs and if you are looking to get into robotics, this is where to start. The HS-805BB servo comes standard with a 3-pin power and control cable, Y-harness, and all hardware listed below.

Note: This servo can draw around 800mA, so keep that in mind when planning a power supply.


  • Voltage: 4.8-6.0 Volts
  • Torque: 274/343 oz-in. (4.8/6.0V)
  • Speed: 0.19/0.14 sec/60° (4.8/6.0V)
  • Direction: Clockwise/ Pulse Traveling 1500-1900usec
  • Rotation: 180°
  • Dual Ball Bearing
  • Heavy Duty Nylon Gears
  • 3-Pole Ferrite Motor
  • D1 Heavy Duty Spline


  • 1x HS-805BB Servo
  • 1x Y-Harness
  • 1x Circle Mega Horn
  • 1x Four Point Mega Horn
  • 1x Single Arm Mega Horn
  • 4x Rubber Grommets
  • 4x 2x15mm Phillips Screw
  • 4x Brass Eyelets


  • 66 x 30 x 57.6mm
  • Wire Length: 300mm
  • Weight: 152g


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Customer Comments

  • I don’t want to start a flame ware here, but only three countries in the world haven’t officially adopted the metric system. I know Sparkfun is in the USA, but even American engineers use metric. Ounce-inches? An online search tells me it’s 2.42 newton-meters, in case anyone was wondering.

    • As an engineer in America, I still use English units. I see that you got the information you needed from the internet, which probably took less time than complaining about the units.

    • As an engineer in America, I am disappointed in the rest of the world if they can’t figure out how to convert units, or use google to find an online calculator that will do it for them.

  • From previous experience working with these servos, (And actually this servo specifically), I can say these things are quite powerful. Though on a side note, if you run them under high stress for awhile they do heat up slightly.

    • I’ve got a project that appears to require more power than this servo has to offer. I have to turn the servo 55 degrees in 3 seconds or less with a load. I’m using limit switches and don’t need feedback. I have tried Nema 17, Nema 23, and now this 808 servo. This servo almost does it. Can anyone suggest a motor of any kind that might work for this?

      Thanks, David

  • Can anyone suggest a servo and driver with 2 or 3 times the power of the HS-808BB?

    Thanks, d

  • Are there any ServoBlocks mounts for use with this servo?

    • Hi. I would like to know the answer to that question myself. I’ve been looking for options to connect this 808 servo to something else. I wondered what horns came with it and looked. Oh yeah! The little round one that comes with it is exactly what I was looking for, well, if it is metal.

      Did you ever find anything to match up to the D1 spline? Seems that someone somewhere has to have something to fit this puppy???

      best wishes, david

  • Any plan on stocking Hitec HS-5805MG?

  • Seeing as how the current expected purchase for 200 units was four days ago, can you provide a current expected arrival date? Thank you for reading.

  • Come on, it has Giant right there in the description. Please add photos with a ruler to give a quick idea of the size. And how about adding both metric and imperial units? Torque in oz-in and dimensions in metric? Just include both. And one more thing, SparkFun rocks!

    Now to get a few of this for a giant T-rex project!

  • These looked kind of jittery in the product video. Would you say these are stable enough for something like a biped or other legged robot, or would it look like me after too much coffee?

  • I am building a robot that runs off of used cooking oil and was wondering if this would work to move the throttle up to accelerate?

  • I’m looking to design a dumb waiter type pully system for my loft, would this work? How much weight could it lift?

  • Just throwing this out there, this thing weighs as much as an orange and the screws are the length of a large mosquito - according to the Dictionary of Numbers.

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