Bob Perkins | 28/09/2012 20:51:15 |
249 forum posts 60 photos | 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.. |
JohnF | 28/09/2012 22:08:06 |
![]() 1243 forum posts 202 photos | 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 |
julian atkins | 28/09/2012 22:41:25 |
![]() 1285 forum posts 353 photos | 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 |
DMB | 28/09/2012 22:48:53 |
1585 forum posts 1 photos | If you use milk, you need to have a good clean up - nice to drink cold but out of date, rank + stinking!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 |
Clive Hartland | 28/09/2012 23:05:47 |
![]() 2929 forum posts 41 photos | Lard is good, will be easy to clean off as well. Clive |
Bob Perkins | 29/09/2012 07:03:26 |
249 forum posts 60 photos | Would a two flute end mill or PCB type drill with a larger shank be more suitable? |
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