Equipment

Hobbing machines, also known as hobbers, come in many sizes to produce different sizes of gears. Tiny instrument gears are produced on small table-top machines, while large-diameter marine gears are produced on large industrial machines. A hobbing machine typically consists of a chuck and tailstock to hold the workpiece, a spindle to mount the hob, and a drive motor.

For a tooth profile which is theoretically involute,

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