TRX-4 Precision 25T CNC Servo Horn with Internal Spring - TRX4025TA/4H by GPM  [TRX4025TA/4H]

CNC 25T Aluminium Servo Horn with Shock-Absorbing Spring

This CNC-machined 25T aluminium servo horn is engineered as a durable steering upgrade for TRX-4 platforms, combining precise spline fit with a stainless internal spring to mitigate impact loads. The design maintains accurate steering input while the spring reduces peak shock transmitted to servo internals, improving longevity under heavy-duty crawling conditions.

Kit contents are: servo horn (1 pc), stainless steel round head screw 3x12 (2 pcs), aluminum collar (1 pc), and 3mm metal washer (1 pc). Hardware items are specified to match TRX-4 spline dimensions and standard mounting interfaces.

Installation considerations: the internal spring increases the horn body thickness and may influence clearance in factory servo placements. When fitted in the OEM position, reversing the support tie rod angle is the recommended method to recover space without altering the front reverse steering arrangement. Always verify spline engagement and link geometry during final assembly.

Functional advantages: the integrated spring introduces controlled compliance to absorb transient loads, reducing shock to gear teeth and bearings while the multiple tie rod positions permit precise steering geometry adjustments without changing link lengths. Ideal for hobbyists seeking a robust, performance-oriented steering arm for technical crawling and repeated heavy use.