Types
Broaches can be categorized by many means:
- Use: internal, or surface
- Purpose: single, or combination
- Motion: push, pull, or stationary
- Construction: solid, built-up, hollow or shell
- Function: roughing, sizing, or burnishing
If the broach is large enough the costs can be reduced by using a built-up or modular construction. This involves producing the broach in pieces and assembling it. If any portion wears out only that section has to be replaced, instead of the entire broach.
Most broaches are made from high speed steel (HSS) or an alloy steel; TiN coatings are common on HSS to prolong life. Except when broaching cast iron, tungsten carbide is rarely used as a tooth material because the cutting edge will crack on the first pass.
Read more about this topic: Broaching (metalworking)
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