The groove in a shaft designed to accommodate a key is called

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Multiple Choice

The groove in a shaft designed to accommodate a key is called

Explanation:
The groove cut into the shaft to house the key is called a keyseat. This term specifically identifies the hollow on the shaft where the key sits, forming a positive drive between the shaft and the attached part so they rotate together. A keyway is the corresponding groove in the hub (and sometimes in the shaft as well) where the key fits, but the shaft’s groove itself is the keyseat. Generic terms like groove or slot don’t convey the precise function, making keyseat the precise description for the shaft feature that accepts the key.

The groove cut into the shaft to house the key is called a keyseat. This term specifically identifies the hollow on the shaft where the key sits, forming a positive drive between the shaft and the attached part so they rotate together. A keyway is the corresponding groove in the hub (and sometimes in the shaft as well) where the key fits, but the shaft’s groove itself is the keyseat. Generic terms like groove or slot don’t convey the precise function, making keyseat the precise description for the shaft feature that accepts the key.

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