View Full Version : Deep drilling 303 stainless steel
batt-man
06-25-2010, 02:48 AM
Looking for some advice...
I have a few lengths of 15mm diameter 303 stainless rod and i need to drill a 9mm hole into the end about 80mm.
I'm looking for any recommend speeds / feeds / cutting oils / words of wisdom / etc...
Cheers
Batt
John Stevenson
06-25-2010, 03:00 AM
Slow speed, about 400, heavy feed, bags of coolant, flood not drip, sharp tool, preferably a brand new cobalt drill.
NEVER let it rub.
303 is the best of the stainless to work, turning and milling with tipped tools is a dream, it's when you drop down to normal tools like drills and taps in HSS that gives problems but 9mm going 80mm deep in 303 should be a breeze.
beanbag
06-25-2010, 05:00 AM
search this forum in thread titles "deep hole drilling"
jimsehr
06-25-2010, 11:18 AM
I would use a parabolic drill . They tend to push the chips out.
Jim
BobWarfield
06-25-2010, 12:47 PM
I would use a parabolic drill . They tend to push the chips out.
Jim
Funny you mention that:
http://www.cnccookbook.com/img/GWizard/GW3034BattMan.jpg
GW suggests when you should consider a parabolic, JS is right on the mark for rpm, and you can see a suggested feedrate there on the screen shot. Peck drilling is also reccomended.
Cheers,
BW