Drilling stainless steel?
#3
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I would use a center punch on a hard surface underneath then use a small carbide or titanium coated bit.Make sure the bit has something to bite into and make sure the bits are sharp!You want to go very slow and if it gets hot use a bit of 3 in one oil to help cool it.Use a quite a bit of down ward pressure.
Chip
Chip
#5
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you can have it on fast if using a battery drill, but just press and release, press release, press release trigger. stops it getting as hot and melting the tip, maybe go through with a smaller drill 1st and use cutting fluid or some oil... or spit if u dont have any !
Last edited by firebug; 17 January 2011 at 05:02 PM.
#6
Cheers lads, will look at a decent drill bit, the only ones I can find so far are just HSS.........http://www.screwfix.com/prods/31100/...2mm-Pack-of-10
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5mm....normal drill bit, slow speed, watch for the ****** as it breaks through, and the most important thing is plenty of lubrication as this will keep the bit cool which will stop it burning out.
If it glows red you have gone to fast lol.
If it glows red you have gone to fast lol.
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#9
use dewallt bits, expensive, but havent found anything that comes close yet.
http://www.screwfix.com/prods/59901/...-HSS-Drill-Bit
http://www.screwfix.com/prods/59901/...-HSS-Drill-Bit
#10
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You can buy bits that are specially ground for stainless, they have different angles ground to the point. They drill ss like it was mild steel, and if you use them on mild steel.....hang onto your drill. I have some in the car, will see if I can see any details tomorrow if you need them.
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#14
Also known as daz
I would look at cobalt drill bits, they're designed for stainless, engineers at work use them all the time as nearly all the gear there is stainless for health reasons.
http://cgi.ebay.co.uk/DEWALT-DT5940-...item3a61b5f36c
Cobalt drill bits offer the best heat resistance and rigid thick web design for drilling in extremely hard and abrasive materials such as treated stainless steel (precipitation-hardened), cast iron and titanium
http://cgi.ebay.co.uk/DEWALT-DT5940-...item3a61b5f36c
Cobalt drill bits offer the best heat resistance and rigid thick web design for drilling in extremely hard and abrasive materials such as treated stainless steel (precipitation-hardened), cast iron and titanium
Last edited by hux309; 18 January 2011 at 01:38 PM.
#16
#17
They need to be over 110mm long.
I've found some on Screwfix, £8+ a set of ten, plus a local guy sells them singly at £2.50 each, 135mm long. Might buy a set, they are Dormer branded, and will be useful anyway.
My Easy-Out is crap though, the threads at the end of the one I need are chewed up to hell.
Must be a crap cheap set............thought they were hardened
I've found some on Screwfix, £8+ a set of ten, plus a local guy sells them singly at £2.50 each, 135mm long. Might buy a set, they are Dormer branded, and will be useful anyway.
My Easy-Out is crap though, the threads at the end of the one I need are chewed up to hell.
Must be a crap cheap set............thought they were hardened
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