Hirobo HI2500113 Rod End PHS 3EC — Helicopter Linkage Replacement  [HI2500113]

Linkage pivot for helicopter control systems

This Hirobo HI2500113 rod end is supplied as a single linkage piece intended for use in helicopter control systems. It connects control rods to swashplate arms, servos, or tail assemblies where a compact pivoting joint is required. The PHS 3EC identifier denotes this particular rod end variant.

Fitment requires matching the rod end's internal thread to your control rod or threaded ball stud. During installation, check thread alignment and engagement, use an appropriate locking method or threadlocker if needed, and avoid excessive tightening to keep the pivot free. Inspect periodically for wear to maintain consistent control behavior.

In terms of setup, this rod end acts as a pivot that can alter linkage geometry and freeplay. Replacing worn elements in the linkage chain can reduce play and produce a firmer control response, though overall feel is influenced by clevises, balls, and servo-arm geometry as well.