Another Long Crack Question

[wilz]

You wouldn't mind sharing your techniques to your success.

[Shepard]

:eusa_danc

Oh, I mis-read, I was thinking the post meant using the ball-bearing on a rubber-band trick. That is when I get stars...

I use Henry Schein burs, and drill 3/4 of the way, then pop the rest with the same bur by hitting the end of my Dremmel...works great.... oops, sorry I asked such a silly beginner question!~

OK, now here is one... every so often, usually when it is really hot (but sometimes not) I try to drill at the end of a crack (about 1/4 inch from the end in the direction I think the crack is heading) and while I am drilling, the light pressure I am applying causes the crack to continue beyond my drill point, then I am "chasing" the end. I can't drill too far ahead of the crack because I can't be sure of its intended route, but if I am too close...

is this just a finesse, experience & luck thing or is there something else I can do?

[wilz]

Coitster, do i have to court you on this one.

[glassfixerCO]

Shepard,
The key on a hot day is to get the windshield cool before you start drilling the end of the crack.

[Coitster]

Well there are a few ways to clean out cracks. The easyest way is to use Isopropen Alcohol and an air compressor. As you spray the alcohol into it use a air compressor to blow out the dirt and alcohol.

[wilz]

You' re the man

[sgailey]

Well there are a few ways to clean out cracks. The easyest way is to use Isopropen Alcohol and an air compressor. As you spray the alcohol into it use a air compressor to blow out the dirt and alcohol.

A word of caution about air compressors:

Be sure the one you are using has been properly maintained! Otherwise they are liable to spit out fluids along with your air.

[Coitster]

Well you must have a moisture catcher with it. Its a little attachment you can buy that will take all the moisture out of the air.
David
Coitster

[screenman]

Hope nobody minds me coming in on this one.
I have been using compressors for drying out cracks since 1988 so I have had a little practise.
First always drill and pop to stabilise the crack.
Next drill a cleat hole as close to the dege as possible.
When using the airline always blow away from the sharp popped end towards the edge. This helps prevent spreading.
12 inch crack in a very wet bus or truck screen will take only a few minutes to dry out using compressed air.

[wilz]

Now, this is getting better.