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Do I want one? What do you use them for? (Seemingly) decent one on offer @ Screwfix, comes with a wire brush which is handy apparently!
[url= http://noviceframebuilder.co.uk/tools/pro-max-350w-6inch-bench-grinder-review ]This framebuilder[/url] uses one for polishing parts.
When I give up my mundane life to be an artisan framebuilder 😀 I shall use one to craft lovely dropouts.
I could use one for sharpening knives, lawnmower blades and axes. cleaning up wood carvings, spoons that I might one day make.
Good for finishing off outer cable ends.
One word. Goggles.
But yes, useful.
Depends. I only use mine for sharpening drill bits and lathe tools. Pretty much essential for those tasks but not really useful otherwise.
A belt-grinder with a grinding wheel on the other end may well be more versatile.