The Scalar’s Spec’d Weapon Motor The Repeat Robotics Scalar antweight weapon motor is the 2305 2400KV brushless motor designed specifically for the Scalar combat robot kit. Repeat Robotics redesigned this motor from the ground up for belt-driven antweight weapon applications — not a repurposed drone motor, but a purpose-built combat weapon drive. It runs on 2–4S LiPo and delivers the power density and reliability that competitive antweight builders need. Engineered for Combat At 2400KV on a 3S pack you’re looking at roughly 25,200 no-load RPM — plenty of weapon speed for horizontal or vertical spinner configurations. The 5mm output shaft comes with a D-flat already installed for positive pulley engagement, and the shaft is retained with a screw rather than c-clips. C-clips are a known failure point under the shock loads of combat; the screw-retained design eliminates that risk entirely. M5 threads on the shaft accept a standard locknut for secure weapon hub retention. Mounting and Fit The motor mounts via 4× M3 tapped holes on a 16mm bolt circle, 3mm deep — the same pattern used across the Scalar weapon system. Body diameter is 28.20mm with a compact 16.0mm height, keeping weight low and CG tight in your chassis. At 30.2g with full-length wires, it fits comfortably within antweight weight budgets. Works directly with the Repeat Robotics Scalar Weapon Pulley and Scalar Weapon Belt 267-3M-05. Works Beyond the Scalar While spec’d for the Scalar kit, the 2305 2400KV is a strong choice for any custom antweight weapon drive. The compact form factor, robust shaft retention, and 2–4S flexibility make it adaptable to a wide range of 1lb combat designs. A 3D model is available on GrabCAD for builders who want to design around it. Safety Warning: Spinning weapons generate extreme kinetic energy. Always engage a weapon lock and test only within a secure arena or test box. Never operate a spinning weapon in an unsecured area. ItGresa Combat Robotics Safety Guide FingerTech Combat Robot Safety Guide FingerTech Test Box Build Instructions (PDF)
