Hirobo HI2521062 Collar 5 x 6 x 9.5  [HI2521062]

Collar for RC helicopter shafts

This Hirobo collar is a small-scale RC accessory intended to locate and retain components on thin shafts used in model helicopters. Its compact footprint and defined internal bore make it suitable where precise axial positioning is needed during assembly or routine maintenance.

When integrating the collar, confirm the shaft diameter against the 5 x 6 x 9.5 designation to ensure correct fit. Slide the collar to the desired axial position, confirm alignment of adjacent components, and secure using the collar's fastening method. After installation, perform a low-speed spin check and visual inspection to verify concentricity and clearance before flight.

For tuning and maintenance, the collar serves as a simple mechanical stop or spacer; replacing worn or deformed collars can restore consistent component spacing without altering other drivetrain settings.