Drilling copper

Drilling copper

This topic has 6 replies, 5 voices, and was last updated 29 September 2012 at 07:03 by Bob Perkins.

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28 September 2012 at 20:51 #99600
Bob Perkins
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@bobperkins67044
I need to drill quite a few 0.8mm holes around a 70mm 2 3/4" 16 swg copper tube. Any advice on speed, coolant drill type welcome.

Thanks

Bob..
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28 September 2012 at 20:51 #15600
Bob Perkins
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@bobperkins67044
28 September 2012 at 22:08 #99609
JohnF
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@johnf59703
Hi Bob, Buy a new pack of HIGH QUALITY HSS drills — don't economise buy a top brand e.g. dormer or similar. Speed— probably as high as you have on your machine but not knowing what machine you have I may be wrong?

For lubricant I would use suds if you have it if not soapy water works well but clean and oil your machine after.

Another one I have read about but never tried since I read it is milk — might be worth a try.

Good luck John
28 September 2012 at 22:41 #99612
julian atkins
Participant
@julianatkins58923
gosh 0.8mm is small! i would be inclined to use a smaller drill first, and deburr on the inside after, then drill through 0.8mm. i use WD-40 or similar (paraffin alternatively) for drilling copper. there is an ideal drill angle for copper, but you wont be able to do that for a drill of that size by way of re-grinding. not too fast.. not as fast as say drilling brass that size.

good luck!

cheers,

julian
28 September 2012 at 22:48 #99613
DMB
Participant
@dmb
If you use milk, you need to have a good clean up – nice to drink cold but out of date, rank + stinking!

I think even a small amount left on machine will probably stink.

I have used (not for copper) excess oil drained from tinned sardines but that goes very smelly fishy pong. Live + learn!

good luck,

John
28 September 2012 at 23:05 #99615
Clive Hartland
Participant
@clivehartland94829
Lard is good, will be easy to clean off as well.

Clive
29 September 2012 at 07:03 #99625
Bob Perkins
Participant
@bobperkins67044
Would a two flute end mill or PCB type drill with a larger shank be more suitable?
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