Mornajina 5Packs 4Inch Green Diamond, Ceramic Glass Cutting Disc for Angle Grinder, Accurate & Chip Free Cutting, Dry & Wet Compatible, 100mm x 1mm x 20mm

Excelente

Do you have what it takes to use these wheels? My two electric grinders have 5/8th arbor which will not do for these. One of my air grinders had an A-daptor kit, as Johnny Cash once said, so I was set!I have two greenhouses that I made from some donated heavy plate glass. 1/4 inch thick. I cut it in the past with a traditional carbide glass cutter/breaker. It was a less than optimal solution. I needed to replace some pieces that broke it a hailstorm this spring and didn't want to use that old cutter ever again. So what to do? I got these, is what I did!It made cutting this thick-ass plate easier by a mile! How I use these disk. I made a wooden "Sled" that I strapped my grinder with the blade. I put tape as a straight line and placed the sled so the blade cuts along the tape line. I didn't cut through the glass but only about a 16th inch deep. I used a cutting oil/water mix to make the blade last and cut cooler. Once I had my cut, I removed the sled, placed a fulcrum under and along the underside of the cut, lifted the plate glass up at the cut side about 2-3 inches, then dropped that end on the fulcrum, breaking the glass smoothly along the cut! I removed the tape and hit the new edges with some sandpaper to get rid of the new razor edges. I made nine 36" long cuts and still have half the blade left.I wish I'd had this cutter wheel 12 years ago!

These small and well-made grinder wheels appear to be very good for cutting glass and tile. The problem is they do not fit on a standard angle grinder - the center hole is too small. They are made for some specific grinder made by this manufacturer or a small grinder. Perhaps they are more for the hobbyist and not for use in construction.

Cuts well and easy to exchange. I reach for these every time I need to change. Stable and can use for a long time without exchanging. I don’t feel like they would fly off when I use them.

I have used this blade on a glass bottle and a mirror it cut great and if you take your time you have the straightest cleanest cut you will need.

Firstly these discs require a 20mm arbor on the grinder. If your grinder has a different size, it will need an adapter. I used one of the blades to cut porcelain tiles which worked well. The cuts are clean and the blade cuts quickly without excess heat. The diamond surface lasts long.I tried cutting some glass bottles to see how it cut glass. It was no challenge and the diamond blade cut through effortlessly. These blades are good value and work well, provided they fit the arbor diameter of your grinder.

I ordered this 5-pack of Mornajina 4" glass cutting disks primarily for glass cutting. I have a couple of those stick-type glass cutters with the carbide cutting wheels, but (and maybe it's my inexperience with using them) I can get fine straight line cuts with them, but have not been able to cut out a rectangle out of the corner of a sheet of glass. I would have to cut ALL THE WAY down one edge and ALL THE WAY down the other edge, which to me seems a waste.So I was pretty excited to get the package delivered at my home. I looked them over and they seemed very well made: quite stiff with the diamond abrasive grit apparently very strongly attached to the perimeter of the disk. They sat in my workshop for a while, and TODAY was the day I went to use one for the first time! I have three angle grinders: one AC-powered and two different battery-powered ones. Unfortunately, these disks did not fit ANY of my machines, which was very surprising. Yes, they are all 4.5 inch grinders, but I've used flap disks and stiff grinding disks that were made for 4" grinders with these machines before with no issues whatsoever. But these disks have a 20mm hole in the center, while the arbors on my grinders are all 5/8". All of them have nuts that have built-in adapters for disks with holes larger than 5/8", but sadly NOT 20mm. So for now I am out of the water with respect to using these disks.I'll hold onto them, of course. At first I thought that maybe I'll buy another grinder that will work with these disks, but then I shopped around a bit and saw that there are 5/8" to 20mm adapter rings specifically made for a situation like this. So there is hope for me to be able to used these items some day - I just need to buy something else to make it happen. Still awarding 4 stars because they look very well made.

These won’t fit any of my three grinders. Based on photos they would, but the bore is not comps with any of mine. They were not manufactured consistently either. Different depth on each one.