I recently purchased a widget works diamond drag and my cutter quit after about 4-5 hours with the default depth/feedrate and was told by their rep that is about the life of the tooling on regular glass.
What I would like to know is if their is anyway to extend the useful life of the bit or find cheaper replacements, I asked about using cutting oil but he thought that would help only somewhat.
I am hoping to use my cutter to score and break stained glass but am not to sure now.
Thanks for the advice.