Hirobo HI2521046 3 x 5 x 5 Locating Collar for Helicopter Parts  [HI2521046]

Precision Locating Collar for Helicopter Shafts

This Hirobo HI2521046 collar is a compact replacement part with a nominal 3 x 5 x 5 size. It acts as a locating collar where exact axial placement of shafts or narrow-diameter components is necessary.

In everyday model use, collars this size are placed on transmission shafts, linkages, or spacer positions to keep components in place and reduce unwanted axial movement. The compact form suits the tight assemblies found on electric RC helicopters and similar small hobby airframes.

Fitting is simple: confirm inner diameter versus shaft diameter, clean mating surfaces, then slide the collar to its intended position. If a firmer joint is required, use an appropriate mechanical retention method you trust, taking care not to apply excessive force that could deform the part.

For setup and routine checks, collars like HI2521046 preserve servo-to-link geometry and maintain preset trim during test flights or bench tuning. They are an economical spare that lets you replace worn spacers without disturbing primary control settings.