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Can I use a shop vac with my table saw?

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Forum topic by DTrak posted 11-09-2015 01:34 PM 1045 views 0 times favorited 24 replies Add to Favorites Watch
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DTrak

39 posts in 558 days


11-09-2015 01:34 PM

I have cabinet maker grade Sawstop table saw with a 4” dust collection port. I also have a shop vac with a 1 1/4” hose. I havent used the table saw yet. Two questions:
-Can my shop vac handle the output from the table saw, or do I need to buy something else?
-If yes, what is the best way to go from 4” to 1 1/4” hose? I have only seen adapter that go down to 2 1/4”.

thanks
Dan


24 replies so far

View WoodNSawdust's profile

WoodNSawdust

1417 posts in 638 days


#1 posted 11-09-2015 01:46 PM

I have never tried to do what you are asking, but my thought is that the shop vac will not have enough power to adequately move the chips. It will get some but not as many as a dust collector will.

The items to consider is suction measured in static pressure and amount of air moved measured in cfm (cubic feet per minute).

Many hobbyists buy the Harbor Freight dust collector. It regularly goes on sale for around $160 then there are 20% off coupons that reduce it even more.

-- "I love it when a plan comes together" John "Hannibal" Smith

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johnstoneb

2143 posts in 1634 days


#2 posted 11-09-2015 02:41 PM

Your vac will pull the sawdust off your saw just fine. You just need to get down to you vac hose.

-- Bruce, Boise, ID

View Bill White's profile

Bill White

4449 posts in 3422 days


#3 posted 11-09-2015 02:57 PM

Reducers are readily available. I bought one a HD (shudder).
Bill

-- bill@magraphics.us

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waho6o9

7171 posts in 2038 days


#4 posted 11-09-2015 03:05 PM

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builtinbkyn

651 posts in 402 days


#5 posted 11-09-2015 03:10 PM

I plan on doing the same, however I think a 2 1/2” hose is needed along with a shop vac that has a rating of 5+ HP and the highest CFM you can find. A separator will also help. I used a Ridgid 16g shop vac attached to the dust port on a Bosch 4100 and it certainly made a difference. However I didn’t have a separator attached, which I think will further improve the performance. So I wouldn’t reduce the size of the collection hose.

-- Bill, Yo!......in Brooklyn :)

View Knothead62's profile

Knothead62

2581 posts in 2422 days


#6 posted 11-09-2015 03:52 PM

I have a DD on my TS and it works OK. It throws some sawdust forward from the blade. You should do OK. Beats sweeping up a barrel of sawdust.

View alittleoff's profile

alittleoff

296 posts in 738 days


#7 posted 11-09-2015 04:02 PM

I have a 16 gal. Rigid vac. That I use on my table saw with a 2.5 inch hose and it does fine.I even hooked it up to my 13 in. Dewalt planner and it kept up with it. The planner really through the chips out. I thought it would clog the vac. But it didn’t. I don’t use it on the planner any more but a vac. Should work on your saw.
Gerald

View TheFridge's profile

TheFridge

5765 posts in 947 days


#8 posted 11-09-2015 04:07 PM

A vac is better than nothing at all and well worth it if you already have a vac.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View Redoak49's profile

Redoak49

1941 posts in 1450 days


#9 posted 11-09-2015 04:18 PM

The answers are interesting. IMHO a vacuum with a 1.25” hose will likely not work well. You need about 4000 fpm to move the chips and dust.

I looked up a 6 hp shop vac with 2.5” hose. The spec shows 179 cfm or about 5264 fpm with that hose. Hooking it up to 4” pipe reduces it to just over 2000 fpm and too low.

Of course any vacuum will help but …..

View TinWhiskers's profile

TinWhiskers

179 posts in 413 days


#10 posted 11-09-2015 04:35 PM

I cut a hole in the top of a 55 gal drum and inserted my shop vac. Works good for my planer and sander.

View Brouss's profile

Brouss

10 posts in 403 days


#11 posted 11-09-2015 04:50 PM

I’m with TheFridge on that one.


A vac is better than nothing at all and well worth it if you already have a vac.

- TheFridge


View Karamba's profile

Karamba

116 posts in 397 days


#12 posted 11-09-2015 06:55 PM

Some saws are designed to work with shopvacs. For example Bosch 4100 has 2” port. Delta 36-725 has 2-1/2” dust port and shrouded blade with very air little volume to move. Shopvacs work really well with them.
If you go to an enclosed cabinet saw with a lot of ventilation openings you need a high volume dust collection, which shopvac is not.

View bearkatwood's profile

bearkatwood

1196 posts in 473 days


#13 posted 11-09-2015 07:49 PM

This should work just fine as long as you can adapt the fittings to work. Just remember to always use it when you are cutting, if you don’t sawdust will build up in the bottom and when you go to use it again it won’t be able to pull through the clog of dust. (ask me how I know) ;)

-- Brian Noel

View DTrak's profile

DTrak

39 posts in 558 days


#14 posted 11-09-2015 08:27 PM

Thank you all so much for the feedback. After reading through these and digging more online, I decided that my little shop vac was probably not up to the task. I ordered this instead:
http://www.amazon.com/gp/product/B00AU0FZPA?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

It is pretty cheap for a dust extractor and probably something I needed anyway.
Dan

View HarveyM's profile

HarveyM

92 posts in 1484 days


#15 posted 11-09-2015 10:28 PM

Hi Dan:

The Sawstop (PCS) has a 1.25” vacuum port on the blade guard, so you can still use your shop vac for that. In fact that’s how I use mine- a 1hp dust collector on the 4” cabinet port in with a cheapy shop vac attached to the blade guard.

-- Just a Duffer

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