Hirobo HI2521145 2x3x6 Mini Collar for RC Helicopter Parts  [HI2521145]

Mini collar for linkages and rotor shafts

The Hirobo collar is a straightforward RC helicopter general part used to control axial location and to retain small components on shafts and within linkage setups. The 2 x 3 x 6 label identifies the nominal collar dimensions used for positioning and spacing tasks.

Install the collar where stable axial location is needed to prevent endplay and to support nearby bearings or bushings. Ensure shafts are deburred and that the collar sits square to avoid off-center loading which can influence rotor dynamics.

In tuning sessions, consistent collar spacing is valuable: it preserves the geometry of control linkages and rotor pitch elements, helping to reduce iterative adjustments during trim work.