Like I said - working at it off and on. But your methods sound more
reasonable. I would now go your direction. The way I did it was like
25-30 years ago.

John

John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com

On 6/22/2011 10:44 AM, Alistair Bell wrote:
> A week! Jeez John! A week?
>
> Easier/faster way is a carbide drill or a diamond drill.
>
> or
>
> a brass tube (diameter of hole), with little shallow slots cut on one
> end with thin bladed saw. Chuck it up on the drill press, make a dam
> with putty around the part of glass you want the hole in, add some
> carborundum grit and oil to make a slurry, then (slow speed) bring the
> slotted tube down and the combo of the slots and the soft brass will
> embed the grit and grind the hole.
>
> I've used a carbide drill, but I have not used the brass tube method.
>
> alistair
>
>
>
>
> On 22-Jun-11, at 8:35 AM, John Rodgers wrote:
>
>> It works. I ground a round hole through the glass in my aquarium so
>> I could run a plastic tube in through the side. I needed a close fit
>> for the tube so I could get the sealer to work. I used the eraser
>> from  an electric erasing tool from the drafting department where I
>> worked as the grinding tool. Applied toothpaste as the grinding
>> agent, much like lapping compound for lapping valves to the seats in
>> the heads. It is a VERY slow process, however. Took me a week of
>> working at it off and on. Didn't know of any other way to DRILL a
>> hole in glass. Not my invention. I saw the method on some craft show
>> on TV.
>>
>> John
>> John Rodgers
>> Clayartist and Moldmaker
>> 88'GL VW Bus Driver
>> Chelsea, AL
>> Http://www.moldhaus.com
>>
>> On 6/22/2011 9:52 AM, Alistair Bell wrote:
>>>
>>> get away!
>>>
>>> really?
>>>
>>> the abrasive in toothpaste is something like calcium carbonate
>>> (chalk) , right?
>>>
>>> or are they adding carborundum to Crest now?
>>>
>>> :)
>>>
>>> John, have you done this trick?
>>>
>>>
>>> alistair
>>>
>>>
>>> On 22-Jun-11, at 7:16 AM, John Rodgers wrote:
>>>
>>>>
>>>> BTW - toothpaste applied on the  end of a rubber power eraser can be
>>>> used to grind a hole in glass, should you ever have the need to do
>>>> so.
>>>>
>>>> John
>>>
>>>
>
>