Ignoramus8644 wrote:

Just got myself a used 1/2 HP baldor grinder. It has openings in the
back of the wheel guards, for dust collector or some such. I am
thinking about attaching a shop vac to these openings. Is this plan
fatally flawed, or is it workable?

Are the openings round or oval? If oval, you'd have to figure the circumference,
find the equivalent sized round piece of PVC, heat it in hot water, and flatten
it to fit, or something like that. Not real trivial.

GWE