Center Driveline Shaft for LAZER ZX7.5 - Kyosho LAW79B  [KY-LAW79B]

Sold under part number Kyosho LAW79B, this aluminum center shaft is specified for the LAZER ZX7.5 family and related ZX-series configurations. The part designation references 88/7075 aluminum, indicating a machined alloy shaft suitable as a direct replacement in the ZX7.5 center driveline.

In a driveline the center shaft carries torque between gearbox outputs and differentials or intermediary gears while maintaining alignment through bearings and housings. When fitting LAW79B, check bearing clearance and retention fittings for wear, confirm smooth rotation during trial assembly, and make sure gears or couplers engage cleanly. Minor adjustments to bearing preload and seating can noticeably reduce noise and improve drivetrain efficiency.

7075-series aluminium offers a practical balance of stiffness and machinability for RC drivetrain components, but actual life depends on load cycles and maintenance. Inspect shaft surfaces, keyways, and set-screw areas periodically and replace the shaft if scoring, burrs, or ongoing vibration persist after routine service.