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Re: [APD] Re: Drilling tanks


What LFSs do you go to?  I've never been in one that would even consider
drilling a tank, or is set up to do it.  Having worked in a couple, it'd be
way too be a pain in the butt, not to mention the liability issues.

Justin Collins

----- Original Message ----- 
From: <BAshcraft at BrashearLP_com>
To: <aquatic-plants at actwin_com>
Sent: Wednesday, March 10, 2004 6:21 AM
Subject: [APD] Re: Drilling tanks

> > Date: Tue, 09 Mar 2004 18:45:46 -0500
> > From: Bill Wichers <billw at waveform_net>
> > For most people who only need a few holes drilled it is going to be
> easier
> > and safer (from the tank's perspective :-) to have the holes drilled at
> a
> > glass shop.
> 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
> http://www.khue.com/dept/grind/dbits.htm
> >You really need a diamond coring bit and a drill press or
> > drilling jig that can keep the bit steady to ensure good results.
> 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 diamond coring bits are usually run at relatively low speed for a
> longish
> > period of time to drill the hole, and are usually used with a liquid
> > coolant/lubricant to keep the bit from seizing or overheating.
> That depends on your definition of "low speed" and "longish period of
> time".  If I remember correctly, 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.
> >The equipment is too expensive for occasional DIY use.
> >
> >          -Bill
> For one time use... maybe.  My bit paid for itself and still saved me $60
> on the first tank.
> Bob Ashcraft
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