Eagle/Freya/EX/SX 5MM Miter Gear HI0404316 for Helicopter Drivetrains by Hirobo  [HI0404316]

Replacement 5mm miter gear for right-angle drives

This Hirobo HI0404316 5MM miter gear is supplied as a common RC replacement part for Eagle, Freya, EX and SX helicopter model lines. It fills the role of a direct service item where a perpendicular gear engagement is needed, matching the 5mm specification in the part ID.

Focus on accurate alignment and mesh during installation rather than relying on torque figures. Remove the damaged gear, inspect the neighboring bearings and shafts for wear, align the new miter gear to maintain straight shaft geometry, and secure the fasteners. Rotate by hand to confirm smooth motion, then run a low-speed check for binding or excessive play.

In service this miter gear primarily affects drivetrain vibration and overall smoothness. Ensuring proper mesh and good bearing condition will reduce noise and extend life, so replace the gear when you notice scoring, tooth damage, or inconsistent meshing during bench runs.