Hirobo HI2521089 Collar 5 x 6.5 x 15 - Helicopter Part  [HI2521089]

Component overview and purpose

This Hirobo collar is an RC-scale helicopter general part defined by its 5 x 6.5 x 15 sizing, intended for shaft positioning and alignment tasks in model helicopters. It serves as a small mechanical spacer or locating ring that helps maintain axial position where a matching bore and shaft diameter are used.

Collets and collars are common in model builds to register bearings, gears and linkages; this item is intended to reduce unwanted axial movement and create a reliable reference point during assembly. Confirm shaft and bore tolerances for correct fit prior to installation.

Treat this product as a precision model accessory for maintenance and routine tuning of rotor and tail systems rather than for any large-scale engineering use.