Principle of Broaching

Principle of Broaching

Principle of Broaching - Broaching is similar to shaping, but instead of a single point cutting tool advancing slightly after each stroke across the work, the broach is long tool with many cutting teeth. Each tooth removes a predetermined amount of metal in a predetermined location in the cut. Each tooth has a cutting edge that is a few thousandths of an inch higher than the one before and increases in size to the exact finished size required.

For machining or removing metal from a workpiece, the broach is pushed or pulled over straight or irregular surfaces either externally or internally. The way and amount of metal removed per tooth (feed per tooth).

The amount of stock removed per tooth varies with the type of operation and material. A general average is 0.050 to 0.125 mm per tooth for high speed steel broaches.