Gallery, Projects and General > How to's

Drilling sheet material

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Rob.Wilson:
HI Lads  :wave:

this is the way i drill  sheet materials like brass and copper ect , as the size of the drill increases the problem gets  worse , any way here we go , i regrind the drill piont to this shape so the outer edge of the drill breaks through first .


This is a 19/32" / 15mm drill ,poking a hole through 0.013" copper sheet

The back side of the sheet ,showing very little rag and the holes come out very round

A few more shots on thicker stuff, on thicker material i normaly drill an 1/16" pilot hole , to help the center cut and make it easyer to locate the drill


I have a god collection of drills sharpend up this way , that i keep for jobs like this , here are some of them


Cheers Rob

sbwhart:
Hi Rob

Thanks for the tip: you've also jogged my memory as I can remember my Father grinding up drills like that.

I'll try that on my boiler build.

Cheers

Stew

Bernd:
Rob,

Brings back memories of when I worked in the shop. They used to call those "sheet metal" drills. Becasue that was all you could cut with them. I was always flabbergasted on how they were sharpened. Now that I have a few spare drills laying around I might just give it a try at sharpening one or two.  :dremel:

Bernd

Bluechip:
Folks ..

Judging by the pics., they look almost the same as 'Lip & Spur' drills. These are available at little cost from woodwork tool suppliers and the sheds.

I have some el cheapo ones, use 'em for dowel holes. They don't wander like twist drills in wood.

No idea whether they can be used for copper etc. for some folk may be better than modifying twist drills.

Think mine (DeWalt ?). were about  £3 or so for 1/8" to 3/8" by 1/16th.

No good if you want a larger hole tho'  :(

Dave BC.

Rob.Wilson:
Cheers Lads

Yep can't remember were i picked up the tip , just no it was a long time ago  :dremel: ,, works a treat and has saved many a part from disastor .

Hi Dave ,,,,,,,,,,yes 'Lip & Spur' drills as used in wood working ,,,,,,,they would probably do the trick


Cheers Rob

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