RC Helicopter Shaft Collar 8 x 10 x 1 Hirobo HI2521130 - Maintenance Part  [HI2521130]

Use and function of the shaft collar

This Hirobo collar is a small-scale accessory for helicopter models where a compact shaft stop or locator is required. The size code "8 x 10 x 1" helps hobbyists identify the correct collar to match shaft diameters and the axial clearance needed for swashplates, linkages, and small drivetrain shafts.

The collar works as a mechanical stop: slide it to the desired axial location on the shaft and secure it with your model's retention solution. That could be a set screw built into the collar, a clamp mechanism, or using threadlocker on adjacent fasteners. The collar itself is the interface that these methods act upon.

For trimming control linkages or dialing rotor head geometry this collar can provide repeatable positioning for washers and linkage ends. It should be considered a fine-adjustment or replacement component rather than a part meant to carry heavy structural loads.