drill bits

[johnluc]

Hi all,appologies if this has been covered but cant find it,what are the best type of drill bits to use on stainless for pilot holes for Qmax hole punch.
johnluc.

 

[simonranson]

John,

Cobalt drills to make light-work of the stainless. I got a set of these http://www.screwfix.com/prods/95497...S-Sets/Erbauer-HSS-Cobalt-Drill-Bit-Set-15Pcs. Do make sure you keep them nice and cool when drilling.

Simon

 

[johnluc]

cheers simon would you drill a couple of holes starting at what size and going to what for a Qmax.

 

[Springer]

As john said and as advised keep them cutting not skating and heating up
Have a look here
Using a short drill allow a better pressure to be applied. :)
S

 

[simonranson]

Yes. I'd start off with a 4mm pilot hole, then it was a 10mm for the 21mm q-max and an 8mm for the 12.7mm q-max. Once the pilot holes are drilled, the larger drills go through so flippin' quick so be careful you dont slam the chuck into the side of the pot!

 

[johnluc]

thanks all for advice just one more is it 10mm hole for 38mm Qmax as well.