Reducing the suction of my Ridgid shop vac?

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Forum topic by Sanity posted 02-24-2012 01:33 PM 2620 views 0 times favorited 4 replies Add to Favorites Watch
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170 posts in 2110 days

02-24-2012 01:33 PM

I would like to be able to attach my orbital and profile sanders to my trusty Ridgid sop vac. The problem is that the suction is too strong and the sanders don’t move smoothly across the wood. If I was to buy a variable speed Festool or Fein dust collector I can just imagine the discussion with my very tolerant wife “Hey sweetheart guess what I just spent $500 on…..”. So is there a way I can safely reduce the performance of my shop vac without wearing out the motor? I was wondering if I could attach one of those remote variable speed unit’s for a router?

-- Stuart

4 replies so far

View Dallas's profile


3599 posts in 1907 days

#1 posted 02-24-2012 01:54 PM

Stuart, If you look at the wife’s handy helper… the vacuum cleaner, you’ll see that at times there is a need to reduce suction. Many of them accomplish this by having a small hole in the side of the tube and a sliding cover over it.

-- Improvise.... Adapt...... Overcome!

View Sanity's profile


170 posts in 2110 days

#2 posted 02-24-2012 02:02 PM

Dallas, I had not thought of doing it that way, thanks. Some sort of Y connector and blast gate may work nicely and a lot cheaper than my original idea.

-- Stuart

View crank49's profile


3979 posts in 2391 days

#3 posted 02-24-2012 03:03 PM

Yes. Dilution fitting, like Dallas said.

And by the way, since the air sucked up by a vacuum is often the cooling air for the motor you could cause the motor to overheat by running it at a lower speed so I wouldn’t put a VS control on a vacuum.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

View Sanity's profile


170 posts in 2110 days

#4 posted 02-24-2012 03:32 PM

Michael, obviously that was a concern. I will see what fittings I can find at my local Rockler store.

-- Stuart

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