Collar 5 x 7 x 13.2 - Hirobo HI2521111  [HI2521111]

Precision shaft spacer for model helicopters

Hirobo HI2521111 provides an aluminium axial locator for small RC helicopter shafts and reflects the 5 x 7 x 13.2 dimensions noted in the title. It acts as a radial stop and locating element where a compact spacer is required.

Installation is straightforward: slide the collar into place on the shaft to set axial position then lock it in using the appropriate retention option for your model such as a set screw, circlip, or adhesive. Use the collar when trimming rotor play or controlling linkage end float to achieve repeatable limits and reduce axial drift.

As a light accessory, the collar is best used for maintenance and minor adjustments rather than primary load-bearing tasks, and it integrates into common build and balancing checks for small helicopters.