RC Shaft Collar 6 x 8 x 3.5 Hirobo HI2521066 for Model Helicopters  [HI2521066]

Shaft collar for small model helicopters

This Hirobo collar is a slim, purpose-built part for small RC helicopter maintenance and setup. The 6 x 8 x 3.5 marking denotes the bore, outer diameter and thickness so the collar can be matched to small hollow shafts and link rods. It acts as an axial stop to control shaft position while allowing free rotation where required.

To fit, slide the collar onto the shaft to the required spot and tighten the contact point until the collar is secure and axial movement is controlled. Review alignment with adjacent linkages and rotor hardware before final tightening to avoid pinching or binding. Confirm fit on your particular shaft before flying the model.

In tuning and servicing, the collar keeps bearings and linkages at consistent axial positions, aiding repeatable trimming and component replacement. Intended only for hobby model helicopter use.