The Arrowmax AM-MRX5-H0251K is a 24-tooth pulley made for Mugen MRX5 RC scale belt-drive systems, machined from 7075 T6 aluminum and finished with a hard coating to improve surface wear resistance. The part is intended for RC drivetrain tuning where reduced rotating mass and reliable belt engagement matter.
The pulley features side holes that help clear debris generated by friction during running, a practical detail for on-track maintenance. As an aftermarket spares item it focuses on durability and repeatable performance rather than altering gear ratios.
Installation notes: verify pulley alignment on the shaft, use correct belt tension recommended by your MRX5 setup, and ensure set screws or fastening method are torqued to the chassis maker's guidelines. Regular inspection of the belt and mating pinion/spur surfaces is advised to maintain consistent drivetrain behavior.
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