The spindle bearings alone will cost you hundreds of dollars. toomuchstuff is right, look for a used one (and about the coolant). btw you will need y travel if nothing else but to dress the wheel.
Sorry for raining on your first post, but it strikes me that a surface grinder is an unlikely diy cnc project - there's just not a huge advantage over manual. Compare it to a mill.... if all someone ever did was straight cuts at constant depth why bother making it cnc? Make sure the design is tight - the potential for a glitch driving a wheel into the work is a bit scary (I live with a, perhaps irrational, fear of a wheel letting go on me)
Finally, good mag chucks are expensive but even a good one might not work. I believe the holding power is relative to the mass of the item. For example I was grinding some 1/8 think washers the other day and need to put some larger flat stock around to stop them from moving about. I don't know how you'd hold something like this - electromagnet chuck maybe? |