Hirobo HI2521046 Collar 3 x 5 x 5 for General Helicopter Use  [HI2521046]

Overview of the HI2521046 Collar

The Hirobo HI2521046 collar is listed as a small-scale locating component with a 3 x 5 x 5 measurement. It provides accurate axial positioning for narrow shafts and small-diameter parts used in helicopter general assemblies.

In practical work, collars this size are fitted on drive shafts, control linkages, or spacing posts to reduce axial play and stabilise component alignment. Its compact profile makes it suitable for confined assemblies commonly found in electric RC helicopters and small airframes.

To install, ensure the bore and shaft diameters match and wipe mating surfaces clean before sliding the collar into place at the desired stop. If a press fit is needed, apply a measured mechanical retention method and avoid forceful pressing that could damage the collar.

During servicing, parts such as HI2521046 are useful for maintaining consistent control geometry and for replacing worn spacers without upsetting existing trim settings. They are inexpensive service items that simplify part renewal.