FingerTech 'Viper' Vertical Spinner Add-On



  • $60.79
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We currently have 8 in stock.

Add a vicious vertical spinner weapon to your Viper Combat Robot!

  • High-speed Brushless Motor and Controller mated to a Clamping Drum with AR400 Steel teeth!
  • Mounts on the existing Viper Combat Robot. (Requires modifying the original plastic armor, or buy a modified set here: Vertical Spinner Armor Set)
  • No soldering required!

Kit Includes:

  • Drum Weapon: 28mm Clamping Drum with AR400 Steel Teeth
  • Motor: D2822/17 1100KV Brushless Motor (4mm shaft) + Screws
  • Controller: 20A Brushless Speed Controller
  • Motor Mount: A pair of D-Series Motor Upright Mounts to secure the weapon motor with double support.
  • Bearing: 4mm Roller Bearing supports the far side of the motor for maximum durability.
  • Wedge: The angled steel V-Spinner Wedge guides opponents up into the drum.
  • Screws: Includes all screws needed to assemble the Vertical Spinner Add-On and a 1/16in hex wrench.
  • Instructions: Detailed instructions with pictures. Viper-V-Spinner-add-on-R2.pdf

* Requires modifying the original plastic armor


  • Weight: 124grams (4.37oz) - added to the base kit, the total weight is 446grams (15.73oz) with a 9V battery, 419g (14.78oz) with a 2S 300mAh lipoly, or 426g (15.03oz) with a 3S 300mAh lipoly.
  • Drum diameter: 61.5mm (2.42in) tooth-to-tooth
  • Voltage: 7.4V - 11.1V. The 7.4V battery included with the Viper base kit works great, but a 3S lipoly will give your weapon extra oomph!


  • Weapon Safety Lock
  • Phillips screwdriver #2
  • Threadlock liquid
  • Electrical tape, zipties, or cable-ties

As with anything related to combat robots, it is potentially dangerous to add a spinning weapon to a robot. Never power up the robot outside of a safety enclosure. Always use a safety lock and follow proper activation procedure.

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