The Hirobo HI0404629 L=70mm pitch lever shaft serves as a direct replacement for cyclic linkages used across Eagle, Freya, EX and SX platform families. Matching the L=70mm length prevents unwanted changes to servo arm leverage and swashplate travel.
As the pivot for the pitch lever, the shaft transfers servo inputs into blade pitch variation. On replacement, check spline fit, inspect bearings and retainers for wear, and confirm there is no end play at the linkage pivot. After reassembly, re-check collective and cyclic throws to ensure predictable rotor response.
Practical notes: remove the rotor head following the model's service instructions, mark any orientation for reference before disassembly, press the new shaft into the lever and secure retainers to the specified torque, then bench-test swash-to-blade movement prior to any flight. This part is intended to restore factory geometry rather than to act as an aftermarket performance modification.
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