Xenophon wrote:
Rex B wrote:


Harold and Susan Vordos wrote:

"Ignoramus8644" wrote in message
...

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?

i




Nothing wrong with the idea, but be advised that if the vacuum is
used for
collecting combustible materials, saw dust, for example, you'll
eventually
set it on fire with sparks from grinding steel. Use caution
unless it's
a dedicated collector, strictly for your grinder.



Put the vac a distance away, for the noise abatement.
Make the intake of thinwall tubing. Run it into a 5-gallon bucket with
a n air-tight lid, with the end of the tub about 3 inches from the
bottom. Fill 3/4-full of water. Attach vac hose to the lid so it pull
air from atop the water.
This way any sparks will wind up in the water, the water will filter
the air enroute to the vac.

Keep the water level up, as it will evaporate.
Be sure the vac is wet-or-dry.


I saw a similar setup in a shop using a 10# coffee can and no water. A
thin plate was welded to the top of the can and a hole cut into it. with
a hole cut into the side of the can near the bottom. the bottom hole
was connected to the grinder and the top hole connected to the vacuum
cleaner. This way most of the sparks went into the can and only the
smallest lightest ones made it into the vacuum plus they had to travel
so much that they were cold by the time they hit the vacuum anyways.
The can was placed at the bottom of the grinder but the vacuum was about
6 feet away under a bench.

That setup would certainly be less restrictive and would be
lower-maintenance than the water trap.