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Shop vac too powerful for ROS?

1K views 3 replies 4 participants last post by  BillWhite 
#1 · (Edited by Moderator)
I recently bought a Bosch ROS65VC-6 and have been attempting to use it with my Ridgid shop vac.

The vacuum overpowers the sander, causing it to move uncontrollably unless part of the pad is off the work surface. It's also leaving lots of swirl marks, but only when used in conjunction with the vacuum.

On the Bosch, there's even a gap that's exposed where the tool meets the hose, I presume to drop the pressure a bit. This is fully exposed, and it's still a problem.

Do I need a less powerful vac or what's the solution here?
 
#3 ·
What redoak said, you need to vent the suction somewhat. I was using a shop vac on a Bosch 3725, and the suction would actually hold the sander in place on a 45° angle when it wasn't running. This has another detrimental affect, it can ruin the hooks on your pad very quickly. Somewhere in your plumbing you need to put a relief hole. Eventually I wound up buying a vac with variable speed just for that reason.
 
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