The Hirobo HI2521088 collar is supplied as a 5 x 7 x 11 replacement item for general helicopter assemblies. It is designed to hold axial position on rotating shafts while taking up minimal radial space.
To fit, slide the collar to the required position on the shaft and secure using the component's existing fastening method. Do not over-tighten the clamp to avoid shaft harm and inspect axial clearance following fitting. This collar is handy for ongoing maintenance, component swaps, and small setup changes on RC helicopters.
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