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Compass Marine How To | all galleries >> Compass Marine How To Articles >> Sealing Deck Penetrations to Prevent Core Rot > Dremel Bit #654
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Dremel Bit  #654
04-Nov-2006

Dremel Bit #654

This is my other favorite bit the Dremel #654. I like this one because most hardware, like stanchions, on 28-42 foot sailboats, is through bolted with 1/4" X 20 thread bolts. The head of this bit is 1/4" and it fits down into a 1/4" hole and can then be used to remove core, for potting, without first over-drilling the top skin to 5/16".


I should mention that I prefer to leave as much of the top and bottom skin in place as is possible. Much of the strength of the deck comes from these skins so leaving them intact when potting hole is the best practice. Leaving the top and bottom skins intact, without over drilling all the way through both skins, leaves you with a "captured plug" of epoxy that can't physically pop out or break free as easily as a complete over drill of both skins can.


Either method is arguably better than not sealing the core at all. Don't fret over the method just chose one and do it before it's too late.

Nikon D200
1/60s f/5.0 at 70.0mm iso100 hide exif
Full EXIF Info
Date/Time04-Nov-2008 12:06:59
MakeNikon
ModelNIKON D200
Flash UsedNo
Focal Length70 mm
Exposure Time1/60 sec
Aperturef/5
ISO Equivalent100
Exposure Bias
White Balance
Metering Modematrix (5)
JPEG Quality
Exposure Programaperture priority (3)
Focus Distance

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