used grades of regular and free-machining steels.
||Generally very good. Relatively heavy cuts usually possible.
||15º to 20º hook angle depending on hardness. 0.½º
to 3º backoff. Use chipbreakers.
||Harder grades tend to dull teeth rapidly, but is generally
feasible. Medium cuts should be used.
||10 to 20º hook angle 2-5º backoff. Use chipbreakers.
|Brass & Bronze
||Generally quite good. Medium to heavy cuts are best.
||0º to 10º hook angle depending on material. 0.½º
back off. Use chipbreakers.
||Very good. Quite heavy cuts generally give best results.
||15 to 20º hook angle 1 to 3º backoff. Standard tools
for steel can be used successfully, but special designs give
||Must be individually evaluated, but good results can often
||Best tool design will depend on characteristics of material.
|Cast or Malleable
||Good-Medium to heavy cuts are best. Cast iron is broached
||Face angles should be about 6-8 degrees, and back off about
the same as for ordinary steel.