The table or spindle often retracts slightly at the end of each cutting stroke to provide clearance for the return stroke. Broaching - Broaching is a process that cuts a finished part in one pass of the cutter. Broaches are long cutting tools that have many series of teeth. The rows of cutter teeth that can pass through or around a part to cut gear teeth. The cutting teeth gradually get larger along the broach until the final rows of teeth take finishing cuts.
Most broaches have three series of teeth.
The first section of teeth are the roughing teeth. These cut the rough shape of the teeth. The second section are called semi finishing teeth, which complete the shape of the teeth. The finishing teeth finish the gears with high accuracy and provide a good surface finish. On the down side, the cost of tooling for broaching is very expensive, and a new broach must be used for each size of gear being made.