SFA

Have a quick question about blades that seem to be out, general topics I’ve seen have been across the board on which to use, what’s best, and how to prevent glazing on the blade. Currently I am using the Farnese Miter Plus Excel for all miters. Used to use a Fusion 4245 for miters but switched over to the robo sawjet from Baca. At the time they didn’t have a miter feature. We’ve tried multiple blades for quartzite across the board and currently we are using the cyclone qtz. Normally I just use an Italdiamant ZT12G yellow for everything including Dekton. After one pass the blades all seem shot and have to be dressed no matter what blade it is. I’ve had the machine die out a couple times during cut. I usually re dress the blade by running it through silestone slowly, since it seems to work better than my dressing stones. Does anyone else have or has used the miter plus and any tips or blades to use for the miter plus on quartzite?

Weha White Lion has been my go-to for quartzite for years. I would try slower feed rates, more RPM, and more water while cutting.

What diameter blade are you using and what rpm does this machine run? Are the rpm's adjustable?

It uses a 14” blade, and the rpms are at 1750 right now. We are putting it through at 1, the slowest speed we have and I am flooding it with water while cutting. The rpms should be adjustable on the machine, inside the control box.

Weha White Lion has been a game changer for us with Quartzite. Mitres through anything in 1 pass at reasonable feed rates.

you need to tweak the rpm and feed speed to find the sweet spot. Ask the manufacturer for recommended feed & speed. We have a blade that we run @ 700 rpm and some we run at 1750.

The horsepower of your saw will make a difference in the equation also.

Learn your saw and blade. You will still have to dress the blade periodically, but not every pass

Jerome, that rpm seems to be perfect. It of course depends on the blade type and may need to be increased/decreased depending on your feeding speed and material thickness. Is your feeding speed adjustable as well? Give me a ring and we can go over a few options that would improve your situation.

We run a Farnese as well, running on one is what is glazing your blade. Dress it and try running between 3 & 4. You have to find that sweet spot and adjust accordingly. For Dekton and porcelain we use the italiadiamont yellow. I am testing some other blades right now that are a better price point but don’t know how they’ll perform.

A hard quartzite should be getting cut at about 1300 to 1600rpm with a 14" blade but this can vary per manufacturer as well. Cutting at the wrong rpm will glaze over diamonds pretty fast.

White Lion, Terminator Q2 and Absolute Black Diamond Red Dragon all performed well on quartzite when we tested these blades. Your rpm sounds good but as suggested before, increase your feed rate and see how it does. You have to push these blades to keep fresh diamonds exposed.

We have been running the miter saw for several years now. Keep the blade. sharp. dress it after each cut. Best material to sharpen is a recipe I learned 30 years ago: One part 16 mesh silica sand and one part molding plaster. Usually will mix 50# of each at a time. Put visqueen down on your saw table, build a form of 2x4 (ripped down to 2" max so it will fit under your miter saw); mix up the silica and plaster dry then add water, mix and pour into your mold. Plaster sets up fast so hustle. In the morning cut up your block into whatever workable size pieces you like. I usually have a stack of these at the bridge saw and we use it for sharpening all blades and cnc tooling as well. The plaster is soft so the blade cuts through quickly and the silica is abrasive to open up the diamonds.