Hirobo HI0301049 XRB Blade Balancer Tool  [HI0301049]

Rotor blade balancing tool

This Hirobo XRB blade balancer is a bench accessory made to inspect and improve the static balance of rotor blades used on RC helicopters. It makes it easy to find heavy spots along the blade span so pilots can make small weight or trimming adjustments that reduce vibration and sharpen control during hover and low-speed maneuvers.

The unit is a straightforward workshop tool used during maintenance and setup; blades sit on the balancer's spindle so they can rotate freely and settle to their low point. By noting which side drops and adding minimal counterweights or removing tiny amounts of material, you can bring a blade back to neutral balance. The tool functions as a diagnostic and tuning aid and does not change blade geometry.

Using the balancer is simple: support the blade root on the spindle, allow the blade to settle, record the imbalance, then repeat adjustments until the blade stays level. Work on a flat, stable surface and keep hands steady to avoid false readings, and handle blade edges and pitch link areas carefully to prevent damage.