QUESTION:How do I prevent a crack from running past the drill hole when using the Delta Kits spring hammer to terminate a long crack?
Be sure you drill 1/32" in front of the anticipated path of the crack with the properly sized carbide bur. We mention “anticipated path of the crack” as you’ll have to make an educated guess on the direction the crack will run, however please note that even with the best educated guess, glass can be unpredictable.
The spring hammer depth gauge is set to the "minimum" drilling depth for optimal performance but depending on the thickness of the glass you may need to drill slightly deeper (at least 1/3 but no more than 2/3 of the first lite or layer). Please watch our spring hammer instructional video, then practice drilling to different depths and popping bullseyes until you get the desired consistent results.
Make sure to check out our other Youtube videos on our channel DeltaKits08.
As always, do not hesitate to give Delta Kits a call for support.