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21-02-07, 06:14 PM

I've just realised its a 3/16" hole you need, you won't be able to drill it in one go, you'll need a smaller pilot hole, 1/16" if possible then enlarge it with 1/8", then 3/16", its starting to sound more expensive for one tiny little hole ! If you have a variable speed drill try it at low speed with lubricant. Once the drill's blunt you're wasting your time, engineers sharpen their HSS drills on a grinding wheel before using them, the precise angle ground into the cutting tip of the drill must be exactly right or it won't cut.

21-02-07, 06:14 PM	#11
oldjack Guest Posts: n/a	Re: Can't drill into exhaust pipe I've just realised its a 3/16" hole you need, you won't be able to drill it in one go, you'll need a smaller pilot hole, 1/16" if possible then enlarge it with 1/8", then 3/16", its starting to sound more expensive for one tiny little hole ! If you have a variable speed drill try it at low speed with lubricant. Once the drill's blunt you're wasting your time, engineers sharpen their HSS drills on a grinding wheel before using them, the precise angle ground into the cutting tip of the drill must be exactly right or it won't cut.