ARRMA Kraton 8S BLX Monster Spur Gear 47T Mod 1.0 by GPM MAKX047TS  [MAKX047TS]

Technical spur gear for ARRMA 1/5 platforms

This replacement spur gear is an aftermarket GPM unit made for ARRMA 1/5 Kraton and Outcast platforms, matching the factory 47T, module 1.0 geometry while using 20CrMnTi steel for improved wear resistance under heavy RC loads. It is intended as a direct-fit spare or upgrade for drivetrain durability and predictable gear mesh when running high-power brushless setups in RTR or roller configurations.

Installation notes: inspect the gearbox and existing spur for debris, confirm the motor pinion pitch and tooth count match the 1.0 module specification, and check backlash after mounting. Use the same shims or spacing as the original to retain correct gear mesh; do not overtighten the gearbox screws to avoid preload on the bearings.

Tuning role: swapping to a higher-strength steel spur reduces risk of premature tooth wear when using large brushless motors and high-torque ESC settings, it does not change gear ratio if you retain the same 47T pinion combination, so tuning remains focused on pinion selection, slipper/clutch settings, and ESC calibration.

For hobbyists replacing a worn factory spur or fitting a more robust steel option for heavy-duty brushless setups, this 47T 20CrMnTi spur maintains original geometry while offering higher fatigue resistance during sustained high-load runs.