Keyseaters

Keyseaters are specialized machine tools designed for cutting keyways into shafts and hubs. A keyway, also known as a keyseat or key slot, is a groove machined into a shaft that accepts a key, a mechanical fastener that transmits torque between the shaft and a mating component like a gear, pulley, or sprocket. This connection prevents relative rotation between the two parts.

The process of keyseating involves a reciprocating cutting tool that moves vertically within the workpiece. The tool, typically a single-point cutter, advances incrementally into the material, creating the keyway to precise dimensions. This method is known for its accuracy and ability to produce straight, parallel keyways. Keyseaters are particularly useful for manufacturing situations where a high degree of precision is required, and for working with larger or heavier components that might be difficult to machine using other methods.

There are several types of keyseaters, including horizontal and vertical machines. Horizontal keyseaters are common for smaller parts, while vertical keyseaters are often used for larger shafts. The operation can be powered manually, hydraulically, or electrically. The depth and width of the keyway are controlled by the machine's settings and the operator's adjustments. Keyseating is a fundamental process in mechanical engineering and manufacturing, essential for the reliable assembly of many rotating machinery components.