The Groove Companion Sheave is used to synchronize hoist gearbox output shafts in a controlled and reliable manner during testing activities. Enables accurate rotational alignment between output shafts, supporting consistent operational behavior during test procedures. Assists in establishing accurate baseline vibration signatures by ensuring synchronized shaft movement. Helps technicians evaluate drivetrain performance by maintaining consistent shaft synchronization.Attributes:• Supports consistent rotational behavior during diagnostic procedures.• Allows controlled synchronization required for vibration analysis testing.• Helps identify performance variations between gearbox output shafts.• Used for bushed-type bore.Applications: The Groove Companion Sheave is located within hoist gearbox testing arrangements, where output shafts are synchronized for controlled operation. In this position, the component enables accurate vibration measurement, consistent shaft alignment, and reliable evaluation of gearbox performance.