Hirobo HI2521143 Collar 2 x 3.5 x 3 General RC Helicopter Part  [HI2521143]

Replacement part details

This Hirobo collar, listed under HI2521143, is an exchange part for helicopter models requiring a small locating collar to retain shafts or control linkages. The size stamp 2 x 3.5 x 3 is provided to assist with selection and replacement.

To install, slide the collar into place on the shaft, check that neighbouring components align correctly, and secure it with the set screw or compatible fastener specified by your model's documentation. Always conduct a movement check to ensure there is no binding before you operate the model.

Collars are commonly used to lock positions during setup and maintenance, enabling consistent adjustments across service intervals. Having replacement collars speeds up repairs and trimming tasks.