Key Steps for Grand Regulating 6

Key Steps for Grand Regulating 6

Hidden Glidebolts:

Not all glidebolts may be visible from the top of a grand action. Keys must clear a protruding bolt or provide space for screwdriver access to a slotted bolt. In some well-known keyframes, one of the glidebolts will be offset toward the back to facilitate the placement of that clearance. But there are keyframes, like the one shown above, that simply offer no access except by key removal.

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Key Steps for Grand Regulating 5

Key Steps for Grand Regulating 5

Bedding the Cheekblocks:

What are the functions of a cheekblock? In a Steinway grand, a cheekblock provides three important services: positioning the action in-and-out for tone, side-to-side for soft-pedal shifting, and up-and-down to complete the crowned frontrail bedding. Arguably, there is a fourth function: securing action to keybed for when the piano goes on its side. And, of course, there are the casepart functions to hold and stop the fallboard. In any case, the guiding and holddown functions conflict, with downward pressure on pins that must slide freely and silently side-to-side.

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