A New Zealand Fabricator’s Guide Ask a fabricator what the best cutting disc is and you’ll probably get a brand name. But brand is only part of the answer. When cutting stainless steel, the right disc depends on what you are cutting, the thickness of the material, the grinder being used, how much heat you can tolerate and whether speed, precision or disc life matters most. So what should you actually be looking for? For most everyday stainless fabrication involving sheet, tub