Pbassred Posted October 30, 2007 Share Posted October 30, 2007 I need to mount an extra pot through the bass body. All of the others are resessed ( i.e counterbored) into the electrics bay. The pot has a 10 mm thread and the body of the pot needs 25mm. I will hand drill it with a big brace and bit, but what about the drill bit itself. What type do I need? There is the flat type which I often see used on chipboard, and there is the old fashioned spiral kind. The spiral ones are the type I associate with hand drills but I'm a metal worker, not a woodman. I just know that I need to cut a clean hole with a clean, flat bottom. Quote Link to comment Share on other sites More sharing options...
neepheid Posted October 30, 2007 Share Posted October 30, 2007 (edited) [quote name='Pbassred' post='81243' date='Oct 30 2007, 01:37 PM']I need to mount an extra pot through the bass body. All of the others are resessed ( i.e counterbored) into the electrics bay. The pot has a 10 mm thread and the body of the pot needs 25mm. I will hand drill it with a big brace and bit, but what about the drill bit itself. What type do I need? There is the flat type which I often see used on chipboard, and there is the old fashioned spiral kind. The spiral ones are the type I associate with hand drills but I'm a metal worker, not a woodman. I just know that I need to cut a clean hole with a clean, flat bottom.[/quote] You need a Forstner bit of the appropriate diameter. They drill nice clean holes with flat bottoms. I used one to sink the bushings for a neck mount I'm about to do, and it ended up like this: This is a forstner bit: This is one in action: That the kind of thing you mean? Edited October 30, 2007 by neepheid Quote Link to comment Share on other sites More sharing options...
warwickhunt Posted November 6, 2007 Share Posted November 6, 2007 I'd be inclined to use that bit in a hand powered tool rather than a powertool... you just know you'll give it a bit too much pressure Quote Link to comment Share on other sites More sharing options...
neepheid Posted November 6, 2007 Share Posted November 6, 2007 [quote name='warwickhunt' post='84452' date='Nov 6 2007, 03:26 PM']I'd be inclined to use that bit in a hand powered tool rather than a powertool... you just know you'll give it a bit too much pressure [/quote] I've got a vertical drill press, so all the control is in the wheel on the side. I don't think I'd be too keen on using one in a standalone power drill either. To be fair though, they don't cut that fast. You shouldn't be applying too much pressure anyway - let the bit do most of the work. Quote Link to comment Share on other sites More sharing options...
Pbassred Posted November 8, 2007 Author Share Posted November 8, 2007 Pillar drill, sheets or rubber, clamps and 300lb mate to hold it steady. Job's a goodun. Quote Link to comment Share on other sites More sharing options...
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