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Wales
by Joske Vermeule, September 1
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Forums39
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Posts837,666
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Jun 14th, 2026
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Joined: Aug 2006
Posts: 1,105 Likes: 17
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Aug 2006
Posts: 1,105 Likes: 17 |
Hi,
I want to drill some holes in the inner wings, what drill bit do you need to stainless steel?
I tried the normal metal ones as they are hopeless
Thanks
Will
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Joined: Apr 2017
Posts: 1,799 Likes: 4
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Apr 2017
Posts: 1,799 Likes: 4 |
I've used these DeWalt bits with some success but not cheap. The flute angle is a bit aggressive and tends to pull through in thin steel so make sure there is nothing vulnerable on the other side of the wing. Brake pipes, wires, hoses etc. DeWalt drill bit
Bob
2009 Black Roadster
1999 4/4 2 litre Zetec
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Joined: Jul 2010
Posts: 53
Just Getting Started
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Just Getting Started
Joined: Jul 2010
Posts: 53 |
Use as low a drill speed as possible -
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Joined: Aug 2015
Posts: 1,616 Likes: 143
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Aug 2015
Posts: 1,616 Likes: 143 |
One with 5-8% cobalt content
Plenty of lubricant as well, currently using Rocol RTD spray or Trefolex
Arwyn
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Joined: Dec 2015
Posts: 938 Likes: 19
Talk Morgan Regular
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Talk Morgan Regular
Joined: Dec 2015
Posts: 938 Likes: 19 |
One with 5-8% cobalt content
Plenty of lubricant as well, currently using Rocol RTD spray or Trefolex
Arwyn
I use Rocol RTD (reaming, tapping, drilling) now but in the machine shop in the 70’, Trefolex was used and it had a peculiar smell about it which I liked.
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Joined: Feb 2013
Posts: 287 Likes: 8
Learner Plates Off!
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Learner Plates Off!
Joined: Feb 2013
Posts: 287 Likes: 8 |
Any descent HSS drill will do considering the small amount of material you will be removing, but you do need to give the cutting edges 0 degree rake by grinding the faces of the lips this will reduce the amount of snatch you will get when drilling through. It would be best if you could clamp a piece of scrap plate behind where you are drilling through, this will help.
P.S. don't buy something cheap from B&Q get a Dormer drill
Last edited by bilibib; 03/06/20 12:59 PM.
Owen
"bilibib"
1982 4/4 Twin Cam, Royal Ivory
1932 Super Sports, Duo tone(two tone)Green
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Joined: Nov 2015
Posts: 8,684 Likes: 493
Just barreling along Needs to Get Out More!
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Just barreling along Needs to Get Out More!
Joined: Nov 2015
Posts: 8,684 Likes: 493 |
Helps to start small with a pilot hole & go up in sizes, the cone shaped & stepped cone drills are good on thin panels too
Jon M
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Joined: Dec 2014
Posts: 220 Likes: 4
L - Learner Plates On
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L - Learner Plates On
Joined: Dec 2014
Posts: 220 Likes: 4 |
These have never failed me yet. Had them for years. https://www.drillallsales.com
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Joined: Apr 2016
Posts: 2,519 Likes: 320
miles of smiles Talk Morgan Expert
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miles of smiles Talk Morgan Expert
Joined: Apr 2016
Posts: 2,519 Likes: 320 |
Presto of Sheffield do a range called Hi-nox especially for Stainless. It features a wider cutting angle, a tighter helix and a stubbier flute, works very well. If you struggle to find them locally PM me and I’ll sort you out with some.
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Joined: Aug 2010
Posts: 5,466 Likes: 171
Charter Member
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Charter Member
Joined: Aug 2010
Posts: 5,466 Likes: 171 |
Use as low a drill speed as possible -
+1 You really don’t want to generate any heat or the stainless steel work hardens and wrecks the bit. I learned this the hard way. Set your drill on its very slowest setting and be patient.
Paul
Costock, UK
Plus Four 75th - Furka Rouge - Pip
Disco 5
Teddy - 17h1 Irish Draught cross
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