Poising Inspector

Inspect poise of watch balance wheels.

What does a Poising Inspector do?

Inspects poise of watch balance wheels to determine if mass of wheel is equally distributed around balance wheel staff, using poising tools and loupe: Mounts wheel in poising tool that supports staff on knife edges as wheel is rotated in channel, using tweezers. Observes rotating wheel to verify evenness of turning, using loupe. Removes screw from uneven or heavy area of wheel and mills screw to decrease weight, using hand milling tool. Rejects and segregates units if balance wheels are out of poise or if general condition of unit does not meet specifications.