Warco themselves introduced some heavy duty single phase 6 & 8 inch bench grinders a few years ago, I'm not sure if they still list them though, These grinders looked quite substantial, and they made of point of the solid work rests fitted to them.
I took a look at them at one of the Harrogate shows, they did look larger and more robust than the usual grinders of the same size. The work rests were indeed strong and solid items, if a little rough and untidy on the examples on show.
Edited By Lathejack on 05/02/2017 01:35:07