How do I prevent a crack from running past the drill hole?

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?

Answer:

To prevent a crack from running past the drill hole, be sure you drill 1/32″ past the end of the crack with the properly sized carbide bur. 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. Please watch our spring hammer instructional video, then practice drilling to different depths and popping bullseye until you get the desired consistent results.