I'm new this message board so I hope I'm repeating topics previously discussed. Our shop is in Oklahoma City, we do laminate, solid surface and stone countertops. We have a Park Industries Titan CNC and are just trying the UHS fingerbits. We're trying the ADI UHS 925566 24mm x 48mm fingerbits. I'm certified to run the Titan but spend most of my time doing cad drawings. Our CNC operator set up the first bit at 6500 RPM @ 14" Min. on some semi-hard granite. The bit got hot and blow-out the middle of it. GranQuartz tells of people getting 20" to 24" Min. @ 7000 - 7200 Rpms (I'm assuming thats with engineered stone) and I was wondering if anyone out there is getting those kind of results. Our CNC operator is currently running it at 4800 Rpm's @ 10" Min. (isn't exactly UHS). He's a little gun shy now and doesn't want to speed it up, but then whats the point of UHS. I told him I'd see if I could get some input from people who know more than I do. I'd appreciate any advise anyone could offer.
                  Thanks; Kirk

Your feedrates sound correct for that fingerbit. We ran them for a while but usually stayed around 15 ipm.

I know too that they say that they can run at 24 ipm but we never tried and never really wanted to try. I've read that the life of the bit is shortened considerably at those rates.

Right now we're using a Diablo fingerbit from Helix Tools. They seem to handle the variety of materials that we cut and the price is pretty good. The only issue that we have with them is that they can't manufacture the tools fast enough so you need to order early.

UHS bits are great but you need to set up 3 to 4 different feed rate in order to use them properly.  7000 rpm 25 ipm is for ES, all the super soft sandy abrasive stones.
6750 rpm 17-18 ipm works great on uba tuba and darker soft stones.  6500 rpm 16 ipm is for blue pearl, tan brown ect..  For really hard stone like tropic brown, I run 6200rpm 14 to 12 ipm.  Quartzites and stupid hard stuff is 5800 to 6000 rpm 10 to 12 ipm.  I run these feeds on a Maxima with no problems.  If the bit starts to whine and you turn down the feed, it will destroy the bit.  if you decease the feed you must decrease the the spindle speed.