Quote:
Originally Posted by Nanozeugma
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I was wondering what would be the most appropriate tool to enlarge the hole neatly? I could, of course, use a half round file, but that would be a bit crude and possibly end up off centre to the existing holes for the fixing bolts.
Your thoughts much appreciated  |
It wouldn't be that much of a chore with a half-round file - to enlarge by 3mm only requires 1.5mm to be removed around the perimeter. That said, if you have a pillar drill, a 'step drill' (often incorrectly terms a 'cone drill', which is tapered -not stepped), is by far the best solution. They've been mentioned before, but are worth repeating. A step drill would do the job neatly and in a jiffy. A set of three isn't expensive, and they're excellent for cutting holes in metal, ABS project boxes, and especially acrylic sheet without snatching, and even cut their own pilot hole. EG:
https://www.amazon.co.uk/Malayas-Tit...74251327&psc=1
Hope that might help.
Good luck with it.