Questions about: angle-grinder

Whether you use water or not is entirely dependent on the blade, not the material (unless you are cutting something soluble in water). Some binders used in diamond blades and bits take heat better than others, and the trade off is how the cut works (
When shopping for an angle-grinder, how important is variable speed? The importance is use dependent. I think that using different disks (grinding, sanding, cutting, brushing, etc. ) is a satisfactory way to get the most use from the grinder
Sharpening with Makita Wet Grinder Sharpening as a 9 page pdf Why Jig? There are differences of opinion on whether it's better to learn to sharpen entirely without jigs, or to use jigs. I used to claim to at least understand the viewpoint of the non-