brianm Posted March 27, 2008 Posted March 27, 2008 If it were me doing it I would drill 1 small hole, say 4mm, then go straight for it with the 10mm.As already said use some kind of lube, a slow speed, and a pillar drill would be best. Going up in 1mm increments will cause the drill to snatch and maybe break.I would reccomend Dormer or other good quality drills, DONT buy cheap DIY drills and dont let your electric drill get to hot, hth Paul Absolutely right Paul. Keep max weight on the drill and very low speed to prevent burning the bit out, may need to feather the speed with the trigger. In the absence of proper cutting oil you will find thick oil a better bet than thinner stuff as it wont run off with the heat as quickly Quote
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