I'm having problems with core /faucet bits. I ordered two new thin wall bits and have distroyed then in three days. Ran these years ago when I did the parts ordering, and they ran fine. Since that they had someone else do the ordering and they have been using thick wall bits. I had to order and got these thin wall bits. What has happedned is they have gone through the diamond and right into the steel of the bit. I haven't changed any tool speed or feed. Speed is 3000 and feed is 30. Is there a bit that I can use for ES and Stone that I would have good luck with? What do others use? Any help would be great.

We've been using thin wall core bits since I started working here. It's been a while since I ordered them but I believe that they are the yellow Talon brand ones.

We had an issue with them a while back - they changed the design on them for some reason to add holes in the side of the bit...I guess so that water and sludge can escape. Unfortunately, when they did that the core would stick in the bit because the water pressure wasn't great enough to force it out. The next hole (and usually the bit) would get screwed up if you didn't stop the machine. Because the plug was in there the water flow was cut and the bit would overheat.

To fix it we wrapped some duct tape around the bit where the hole were and we haven't had a problem since.

Brian, the bit cut a faucet hole and the plug is still attached to the top. It will be knocked out on site. The yellow talon bit's are what I'm using. I did have question about the holes on the side. Thought they were new. Just can't understand what's going on. By the time they got to the machine the bit was about 1 1/2" long now. Can't imagine what the stone looks like.

Ed -
We use the same core to drill a pilot hole in sink cutouts. Those get drilled all the way through so that we have somewhere to drop the finger bit down. Those were getting stuck in the bit.