Shop vac too powerful for ROS?

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Forum topic by Dagobah posted 03-15-2017 03:45 AM 620 views 0 times favorited 3 replies Add to Favorites Watch
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71 posts in 837 days

03-15-2017 03:45 AM

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 replies so far

View Redoak49's profile


3598 posts in 2163 days

#1 posted 03-15-2017 11:13 AM

I drilled a hole in the fitting closest to my sander. I cover it with tape when using it for other tools.

View Fred Hargis's profile

Fred Hargis

5142 posts in 2668 days

#2 posted 03-15-2017 11:28 AM

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.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Bill White's profile

Bill White

5105 posts in 4135 days

#3 posted 03-15-2017 02:06 PM

Won’t a speed reducer work on the Ridgid vac? Far as I know, they (mine) use a universal motor?


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