TS outfeed table with downdraft #1: The Nutty Professor is at it again

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Blog entry by Mainiac Matt posted 05-21-2013 01:24 AM 2882 reads 1 time favorited 3 comments Add to Favorites Watch
no previous part Part 1 of TS outfeed table with downdraft series Part 2: cut the parts today... »

This view shows the back side of my recently refurbished TS. There are ~46” between the saw and my primary work bench. I lowered the bench to match the height of the TS @ 32-7/8” and planned to bridge the two with an outfeed table…. but I wanted to do something different with it.

Since I have two 4” DC lines running back there, I figured this would be a great place for a down draft table.

Here’s the preliminary design…

To maximize air flow, I figured I’d ‘Y’ off of both 4” lines to the bottom, minimizing bends and bends in the flex hose. And rather than buy two blast gates, I figured it would be easy to fabricate a two hole gate into the bottom…. like this”

Reading up on the topic, I decided to size the hole at 1/2” diameter, with a pattern of 3/4” holes added, so I can use my plastic bench dogs to secure the pieces I’m sanding.

Bill Pentz has some very good info on his sight on the topic of down draft tables, but it’s difficult to know what numbers to use, since the published stats on my Grizzly single stage canister DC are pretty ambitious. Grizzly advertises , 1,700 cfm with 10” static pressure drop…. so I figured if I was really pulling 800 scf, I was probably doing pretty well. Fortunately, BP’s Q&A on the topic published some design numbers for a similar capacity setup, so I used that as my guide.

-- Matt -- I yam what I yam and that's all what I yam

3 comments so far

View DIYaholic's profile


19921 posts in 4126 days

#1 posted 05-21-2013 01:57 AM

Souds like you have a plan….
Anxiously awaiting it’s implementation!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View Handtooler's profile


1628 posts in 3583 days

#2 posted 05-21-2013 04:00 AM

Your research and imagination is leading to a wonderful addition to an already fantastic job you’ve done with the refurb of the TS! Keep the blog coming, please.

-- Russell Pitner Hixson, TN 37343 [email protected]

View Mainiac Matt 's profile

Mainiac Matt

10050 posts in 3780 days

#3 posted 05-21-2013 03:20 PM

Thanks for the encouraging words Russ.

-- Matt -- I yam what I yam and that's all what I yam

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