Eagle Series W-Type 19mm Bearing Holder - HI0404619 by Hirobo  [HI0404619]

W-type Bearing Holder: Overview and Purpose

This Hirobo spare part is an RC-scale W-type bearing holder intended for model helicopter maintenance and tuning. It accepts a 19mm diameter bearing and is used where a compact, stable mounting point is required for tail or main shaft assemblies. The part focuses on fit and replacement utility rather than cosmetic change.

Installation is typically done during routine bearing replacement or when correcting shaft endplay. The holder provides a consistent seating surface to keep a 19mm bearing aligned under rotational load, helping maintain tracking and reducing play that can affect tail stabilization and overall rotor balance.

Tuning notes: verify shaft alignment and bearing preload after installation, check clearance with surrounding frames or linkages, and run a static spin test at low throttle to confirm there is no rubbing before flight. Use appropriate threadlock on any fasteners if the original design specifies it, and follow your model’s service intervals for bearing checks.

This component is compatible with Hirobo Eagle series airframes and the common parts grouping that includes Freya, EX, and SX models where the factory parts list specifies a W-type bearing holder accepting a 19mm bearing.