17 years ago
We have a project here that requires drilling a couple hundred roughly
two inch deep approximately .4" diameter holes (exact dia has not been
determined yet) in some 410 SS turbine seal housings (the holes were
left out by mistake in the design). I don't know if 410 ss is heat
treatable or if it is, if it has been heat treated. It's a lightly
stressed housing and not subject to wear so I don't believe it's been
subject to any particular heat treat process.
The plot thickens because the turbines are on a small island in the
Pacific. We have a reasonable machine shop and fairly skilled labor,
but it's not a fully industrialized place.
We're concerned about bit life in the 410 stainless steel. We have
time to order enough bits from the outside world. Is there any special
bit coating we should specify? Flute angle or anything else that will
help with the 410 stainless? Any special cutting oil or recommended
bit speeds? Any special precautions to take?
Sure appreciate any comments or suggestions.