Broach

Broaches are typically used in metal working. The basic purpose of using a broach is to expand a circular hole in to bigger shapes (non-circular) like square or other . A broach is defined a string or series of increasingly taller chisel points fixed on a piece of steel, or metal. Broaches used on gears, pulleys, drive shafts are perfect for cutting splines or square keyway. The tooth of the broach is so designed so that it can cut steel, brass or other metal very easily. Some broaches fixed on machines can be pulled or pushed through an existing hole.