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Reducing the suction of my Ridgid shop vac?

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Forum topic by Sanity posted 02-24-2012 01:33 PM 3497 views 0 times favorited 7 replies Add to Favorites Watch
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Sanity

171 posts in 2442 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


7 replies so far

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Dallas

3599 posts in 2239 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!

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Sanity

171 posts in 2442 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

crank49

4016 posts in 2723 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.

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Sanity

171 posts in 2442 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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tnvanman

4 posts in 2737 days


#5 posted 01-13-2017 09:49 PM

I built a box to hold a 15 gallon plastic bucket and mounted a Oneida Dust Deputy on top attached to a small ShopVac. Box is 16×18x24”. The Dust Deputy was connected to the Shop Vac with regular hose. The smaller hose attachs to the Festool sander with normal hose. I had to heat up the plastic intake end of the hose and run a broom handle internally to splay out the opening to fit 27mm Frestool connection. I also used a hose clamp to squeeze the connection tight.

The suction can be adjusted with holes in the box.
Cover the hole or holes when more suction needed.

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AHuxley

652 posts in 3073 days


#6 posted 01-13-2017 10:18 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.

- crank49

Festool, Fein et al use a separate fan to avoid any issues with cooling, that said I know several people that have used router speed controls on shop vacs for years with no ill effects, I did for a while until I went a different route. I was reticent at first due to cooling but would not have an issue now, the added benefit is less noise than when running full blast and bleeding air also adds to the noise.

View teejk02's profile

teejk02

469 posts in 877 days


#7 posted 01-13-2017 11:55 PM

Grandma’s old Electrolux had that opening that Dallas mentioned above but that old machine was no where near as powerful as the Ridgid shop vac (I think mine could fetch a bowling ball from 20’). I think that blast gate solution is probably the best.

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