O.S. Engine OS74004039 Propeller Shaft Set (OMA-3810, OMA-3805) for RC brushless motor components  [OS74004039]

Propeller shaft set for OMA-3810/3805

This propeller shaft set is an RC-scale replacement part labelled OS74004039 by O.S. Engine, intended for use with models that reference OMA-3810 and OMA-3805. It serves as a direct spare for the rotating linkage inside compatible brushless motor assemblies and related driveline couplings.

Installation notes: prepare the model on a stable workbench, remove the motor or transmission cover as required by your chassis, verify shaft alignment and bearing clearance before final assembly, and torque fasteners to your chassis maker’s recommended values. The part is designed to replace worn or bent shafts to restore concentricity and reduce play.

Tuning and maintenance role: swapping this shaft can be part of routine upkeep to limit vibration and to keep rotational alignment within expected ranges, which helps maintain predictable motor behavior during setup and practice runs. Check mating parts such as bearings and couplers during the process to ensure a smooth fit.