How does the nominal keyseat height compare to the key height?

The nominal keyseat height is specifically designed to accommodate the key that will fit within it and is typically larger than the actual key height to ensure a proper fit and clearance. The nominal keyseat height allows for tolerances and variations in manufacturing, thereby preventing issues related to tight fits or improper alignment.

Stating that the nominal keyseat height is half the key height doesn’t align with standard practices, as it is not common to have a keyseat that is smaller than the key itself. The nominal keyseat is actually intended to be larger than the key height to ensure that the key can easily fit within the keyseat without risk of binding or jamming, further facilitating assembly and operation.

In summary, the keyseat must be sufficiently larger than the key to ensure functionality, which is why understanding the dimensions used in mechanical components is crucial.