HI2521124 Shaft Collar 12 x 15.9 x 6.8 for Hirobo Helicopter Parts  [HI2521124]

Rotor shaft collar specification

Designed for general RC helicopter use, the HI2521124 collar from Hirobo has nominal dimensions of 12 x 15.9 x 6.8mm to ensure correct shaft clearance and stack spacing.

As an axial spacer it locates parts within rotor heads and drivetrain stacks to keep running concentric and to reduce axial movement during operation.

Fitment tip: place the collar onto the shaft, confirm it sits flush with adjacent components, inspect for wear or ovality before reuse, and follow the original assembly sequence when locking the part in place.