Table saw dust collection - Woodworking Talk - Woodworkers Forum
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post #1 of 10 Old 08-20-2018, 10:48 AM Thread Starter
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Table saw dust collection



Just wanted to run it by my fellow wood workers to see if I知 doing a okay job on my table saw for dust collection after the cherry wood misshapen with burning my skin so thought I put my dust collection on my table saw.
Thank you
Freddy
BuiltinWestchester


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post #2 of 10 Old 08-20-2018, 01:56 PM
where's my table saw?
 
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I see a few issues ...

Table saw dust collection is one of most difficult machines to achieve perfect results! You either need a DC with the velocity and CFM of a small jet engine OR allow gravity to do it's thing and settle the dust down into a funnel shaped inlet. Your inlet is dead flat and the inlet pipe sticks up about 1/2" or so. That will make it more difficult for the dust to get into it, so make it flush. You will find, and I have pretty much the same setup, that a lot of dust will collect in the corners and never make it down the inlet. I just deal with it by taking a narrow stick and moving it towards the inlet with the DC under power. It works for the moment, but it just comes back again.

A gradually sloping bottom panel or a funnel shape would work better than a dead flat one, BUT it wouldn't be 100% better, just more better.
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post #3 of 10 Old 08-20-2018, 02:16 PM Thread Starter
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Quote:
Originally Posted by woodnthings View Post
Table saw dust collection is one of most difficult machines to achieve perfect results! You either need a DC with the velocity and CFM of a small jet engine OR allow gravity to do it's thing and settle the dust down into a funnel shaped inlet. Your inlet is dead flat and the inlet pipe sticks up about 1/2" or so. That will make it more difficult for the dust to get into it, so make it flush. You will find, and I have pretty much the same setup, that a lot of dust will collect in the corners and never make it down the inlet. I just deal with it by taking a narrow stick and moving it towards the inlet with the DC under power. It works for the moment, but it just comes back again.

A gradually sloping bottom panel or a funnel shape would work better than a dead flat one, BUT it wouldn't be 100% better, just more better.


I知 sure gonna make it flush I知 kind of coping off a wood worker on the forum he sent me some pics but only the outside so I知 making it up as I go along thank you very much


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post #4 of 10 Old 08-20-2018, 03:57 PM
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Why not take out the whole center piece of wood and make the hole larger. If going this route, make sure all seams are air tight
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post #5 of 10 Old 08-21-2018, 10:46 AM
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Quote:
Originally Posted by woodnthings View Post
Table saw dust collection is one of most difficult machines to achieve perfect results! You either need a DC with the velocity and CFM of a small jet engine OR allow gravity to do it's thing and settle the dust down into a funnel shaped inlet. Your inlet is dead flat and the inlet pipe sticks up about 1/2" or so. That will make it more difficult for the dust to get into it, so make it flush. You will find, and I have pretty much the same setup, that a lot of dust will collect in the corners and never make it down the inlet. I just deal with it by taking a narrow stick and moving it towards the inlet with the DC under power. It works for the moment, but it just comes back again.

A gradually sloping bottom panel or a funnel shape would work better than a dead flat one, BUT it wouldn't be 100% better, just more better.
I used one of those dust hoods under my contractor ts, but like you said a lot of dust builds up in the flat corners. The dust hood has a slight slope to it but the cabinet itself has the lip that makes for flat edges and corners.
I also made an over the blade dust collector.
The whole setup isn't perfect but gets most of the dust. And I've got a separator between the saw and dust collector which I'm sure causes a loss of suction.
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post #6 of 10 Old 08-21-2018, 02:29 PM
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Quote:
Originally Posted by flytoolow View Post
Why not take out the whole center piece of wood and make the hole larger. If going this route, make sure all seams are air tight
When I refurbished my Grizzly, I cut a hole in the top of the stand to match the opening in the bottom of the Grizzly's cabinet, about 16" or so square. This lets most of the sawdust drop through into the drawer below. I just slide the drawer out and dump it occasionally.

The sawdust in the drawer in the second picture is what was captured from 2 passes of the 2X10 shown. It doesn't capture sawdust from above the table, but it does ease cleanup substantially.
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post #7 of 10 Old 08-21-2018, 02:38 PM Thread Starter
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Quote:
Originally Posted by Alchymist View Post
When I refurbished my Grizzly, I cut a hole in the top of the stand to match the opening in the bottom of the Grizzly's cabinet, about 16" or so square. This lets most of the sawdust drop through into the drawer below. I just slide the drawer out and dump it occasionally.



The sawdust in the drawer in the second picture is what was captured from 2 passes of the 2X10 shown. It doesn't capture sawdust from above the table, but it does ease cleanup substantially.


That痴 real nice like the idea do you have pics of the inside?


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post #8 of 10 Old 08-21-2018, 03:17 PM
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Best system I ever had for bottom end of a contractor saw was the kit Craftsman offered with the plastic frame and the bag that attached to it.
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post #9 of 10 Old 08-21-2018, 04:07 PM
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That痴 real nice like the idea do you have pics of the inside?


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Not much to it -hole cut in the top of the base, drawer mounted underneath. First pic looking into the back of the saw, second is from underneath with drawer out. Drawer was made as close as possible to sides/back of the base.
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post #10 of 10 Old 08-21-2018, 06:42 PM
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Common sense dust collection .... theory?

Here's my theory of dust collection based on years of observing flying and fallen dust particles. As long as they are flying, you can capture them, but once they have fallen (out of the air stream) you can't catch them. The fallen ones have been effected by gravity, and it's too late for them.

So what's the answer? Like I said earlier, a giant high velocity, high volume "sucker" with a minimum of 5 HP maybe 10 HP. This will probably collapse the top on your table saw, but it will suck out all the dust.
We don't like that answer much at all. To have a dust collector with more HP than your table saw seems counter productive, counter intuitive. So, we all struggle with under powered 1 1/2 HP or 2 Hp upright dust collectors like Jets and Harbor Freight units. Those who are brave enough to try the 3 HP versions like the twin bag Grizzly and cyclones are rewarded with better performance.

For those who have tried overarm dust collection on the table saw, like myself, that's a pretty good method to keep the air cleaner, but even that won't get all the dust that ends up inside the cabinet. The best solution, and the newer table saws have have it, is a blade shroud that encloses the blade with a shop vac port immediately behind off the rear. This captures the dust right at it's point of generation, is not in the way like an over arm system and can use the smaller easier to manage hose size of the shop vac. I own a Bosch job site saw with that shroud and it really works well.

That's my theory.

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 08-21-2018 at 08:56 PM.
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