drilling 304 stainless steel


Old 09-29-04, 09:34 PM
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RPM drilling 304 stainless steel

hi I have to drill a 1 inch diameter hole 4 inch deep in 304 stainless, I'm working with a metal lathe and a 1 inch diameter Prentice Bit I 'm woundering what rpm I should be runing at, and what type of pressuer light medium heavy. and of course tuns of cutting oil

Last edited by bigtonyicu; 09-30-04 at 07:17 AM.
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Old 09-30-04, 01:35 PM
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Start slow with minimum pressure and work up from there.
Old 10-01-04, 03:01 PM
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I'd do a pilot hole and work up to 1" diameter and, as you said, lots of coolant. I use Mobil, water solubile cutting fluid mixed 5% with 95% water. It works slick with stainless and, although it makes a mess on the floor, it's cheap and that's what Speedy-Dry is for anyway. I've done 2" diameter holes in 12 gauge stainless with a low end hole saw and, after 2 years and god know how many holes, the hole saw is almost as sharp as the day I bought it. I made a coolant flood system with an old sheetrock bucket, nylon window screen, vinyl tubung and an acquarium pump.

If you're interested, let me know and I'll get the number off the Mobil jug. I can also send you (or anyone else here) some photos of my DIY cooling system.

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