Hirobo HI2521091 Collar 5 x 7 x 18.3 RC Spacer  [HI2521091]

Technical Notes

This RC-scale collar is catalogued as Hirobo model HI2521091 and is described with the dimensional tag 5 x 7 x 18.3 to indicate its shaft and axial sizing. Use that measurement to confirm whether the collar will suit your rotorlinkage or transmission stack.

The component functions as a spacer and locator, maintaining component alignment and enabling fine axial adjustment where accurate positioning affects performance or wear characteristics.

Installation is straightforward: compare the listed 5 x 7 x 18.3 dimension to your model’s shaft or bore, slide the collar into the intended position, and secure it with the existing fixing method for your model. This entry covers RC use only.