1lb Beater Bar


Destroy the competition with FingerTech’s 1lb Beater Bar! This design has been proven in the 3lb class, taking home trophies in events all over the world. Now you can rule the Antweight class with this 1lb-scaled Beater Bar Assembly!

See our 1lb Beater Bar Electronics for a perfectly matched motor/ESC combo.

Find the 3lb Beater Bar for beetleweights here. And the matching electronics here.

ItGresa Robotics has partnered with Fingertech to bring the best of their robotics to the United States.  Fingertech’s expertise, plus our robotic activities, make the ideal partnership, and we are proud to offer Fingertech products.

Beater bar is a class of weapons called “Eggbeaters”. Once you’ve seen them in action, the reason is obvious!

See a 3lb beater bar in action in a short beetleweight fight:

Eggbeaters are similar to drum spinners, only with flat, not cylindrical, shapes.


22 in stock (can be backordered)

SKU: ft-1lb-beater-bar-assy Categories: , ,


  • Sized for the 1lb “Antweight” class.
  • NOT a drop-in weapon for the Viper Kit
  • Length: 76.2mm (3in)
  • 26T pulley with Delrin flanges adds 9.4mm (0.37in) to length. Total length: 85.6mm (3.37in).
  • Height: 38.1mm (1.5in)
  • Thickness: 15.88mm (0.625in)
  • Material: 6061-T6 Aluminum
  • Total assembly weight: 185grams (6.53oz)

Other Details:

The 1lb beater bar has 4 holes each side for 5/16-18 screw “teeth”.

Installed teeth add 12.7mm (0.5in) to height. Total height: 50.8mm (2.0in)

Max outside frame width should be 105mm (4.15in) or less. Frame material thickness of 6.35mm (0.25in) works well.

1lb Beater Bar kit Includes:

1 – 1lb Beater Bar
1 – Custom 26T S3M pulley with two outer Delrin Flanges
2 – Countersunk 6-32 x 0.625in screws
8 – “Teeth” 5/16-18 x 0.75in countersunk black oxide screws plus lock washers (Thread-lock is recommended.)
1 – 1/4-20 x 4.5in Gr8 Hex bolt and Nylock Nut “dead shaft”
2 – SCE44 1/4in roller bearings
1 – 5/64 hex wrench for installing pulley
1 – 3/16 hex wrench for installing teeth

This is NOT a drop-in weapon upgrade for the Viper kit.


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 procedures. Visit our Safety Information page for more information.

Check out our 1lb Beater Bar Electronics for a complete set of gear to drive a deadly weapon.

You can see Battlebots class eggbeater weapons here.

The 3lb Beater bar is here. and the electronics to run it are here.