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Re: [APD] Re: Drilling tanks
If you're drilling down on a horizontal surface, you can
build a well around the area being drilled with modeling
clay to retain a small amount of water to keep the bit and
If drilling on a vertical surface, you can rig a bottle
with airline tubing to provide a steady but light stream of
water for cooling -- masking tape will hold it the
waterline in place over the drill area.
Bob, have you used these bits? Do you know how many
drillings are they good for?
--- BAshcraft at BrashearLP_com wrote:
> > Date: Tue, 09 Mar 2004 18:45:46 -0500
> > From: Bill Wichers <billw at waveform_net>
> Most LFS's that sell tanks will drill it for you.
> Though, at $15-$20 per
> hole, the cost will quickly surpass the cost of the
> diamond bit. A 45mm
> bit (1 3/4") is less than $40 from here
> A 3/4" board with the appropriate size hole cut in it and
> clamped to the
> glass works very well for a drilling jig.
> . . . the recommended speed on
> a 45mm bit is
> about 800 rpm. Water can be used for coolant and it took
> 4 or 5 minutes
> to drill a piece of 3/8" thick glass. This includes
> stopping to add
> coolant every 15-20 seconds. The coolants purpose is
> ultimately to keep
> the bit from overheating, but more importantly, to flush
> away glass
> particle and keep the bit from clogging and causing the
> high heat.
> For one time use... maybe. My bit paid for itself and
> still saved me $60
> on the first tank.
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