A couple of thoughts on the beveling process...if I have several holes to do in one project, while he mentions changing from bit to bit, I like to use more than one drill motor; one for the drill bit, one for the counter-sink bit and a third for a phillips head bit for the fastener itself...while I have for years, beveled FASTENER holes intended for a wood type screw to thread into, I never thought to bevel a CLEARANCE hole for a machine screw to pass through..it makes sense as it does away with that 90* edge of the hole which is easily cracked and provides for a bit more sealant where it counts...I've never used Butyl Tape, but it sure looks like a good idea in some installations...but not below the waterline...
A couple of times w/just a couple of holes to bevel, I have used the tip of a phillips head screwdriver...twisted back and forth between your opens palms, it quickly takes that 90 off the edge...once I couldn't find my countersink bit, I put a phillips bit in the drill motor and it worked fine...
One thing I'd like to ask him; If beveling reduces cracking and failed seals(which I agree it does), does he ever bevel outside AND INSIDE of through holes...if not, why not?
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'74 V-20/ BF 150
'95 V-21/ BF 150
'84 V-20/ 200 2.4 Merc
'87 V-20/'18 F150 Yamaha
Last edited by reelapeelin; 01-19-2013 at 07:17 PM.
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