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Table saw dust above the table

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Forum topic by mlipps posted 09-21-2016 02:43 PM 697 views 0 times favorited 23 replies Add to Favorites Watch
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mlipps

88 posts in 582 days


09-21-2016 02:43 PM

Topic tags/keywords: table saw dust collection dust guard dust over the head dust guard

Hi All,

I have a SS ICS 3 hp and I’ve noticed a large amount of saw dust escaping above the table saw such that my shirt is covered in saw dust. I’m running a 1.5hp Jet 1100vx dust collector directly to the table saw with no more than a 6ft run. Nothing else is attached to it. I do have a zero insert equipped. The only thing I can think of is that the back of the table saw blade is hitting it as it comes around. I’ve bumped out the fence about 0.005” but I’m not seeing a difference.

I could slow my feed rate, but then burning occurs when I cut 8/4 stock. Plywood is fine in that there is no burning but it still produces a lot of saw dust.

My question is, is this the nature of the beast when not using an over the head dust guard or is this fixable?

Thanks everyone,
M


23 replies so far

View Joshh's profile

Joshh

28 posts in 85 days


#1 posted 09-21-2016 02:50 PM

Do you use the blade guard ? If so cover the hole on the back of the guard with a piece of paper or something. I is designed to work with the overhead dust collection and if the one is not used it spits a lot of dust.
But generally no matter what when you finish the cut the dust is thrown at you. You can use a thin kerf blade to decrease the amount of it by 30% but generally there is no cure.

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WhoMe

1472 posts in 2711 days


#2 posted 09-21-2016 03:12 PM

Imo, it is the nature is the beast. With a zero clearance and no upper dust collection, any sawdust not in the gullet of the blade as it goes below the table has no place to go but up.
I noticed this on my old saw (before my SS). With dust collection below and a standard insert, I saw very little sawdust. But as soon as I put a zero clearance insert on, I saw a big difference in how much sawdust stayed above the table. There was simply no place for the sawdust to get sucked below the table.

-- I'm not clumsy.. It's just the floor hates me, the tables and chairs are bullies, the wall gets in the way AAANNNDDD table saws BITE my fingers!!!.. - Mike -

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mlipps

88 posts in 582 days


#3 posted 09-21-2016 03:18 PM

@WhoMe it still happens even with the standard insert and riving knife (I am not using the over the head blade guard).

Do you still get a lot of saw dust with your SS (since I have a same brand saw).

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Redoak49

1964 posts in 1456 days


#4 posted 09-21-2016 03:38 PM

I have the PCS and without the guard/dust collector , you will get a lot of dust.

When I put the blade guard on and hook it to my dust collector, it works pretty good.

I am using the over arm dust collection along with the one to the cabinet. If you do not have dust collection over the blade you will get a lot of sawdust.

My dust collector is a 5 hp Super Dust Gorilla piped into my shop.

View clin's profile

clin

514 posts in 463 days


#5 posted 09-21-2016 04:46 PM

I have a SS PCS and have found the type of cut makes a HUGE difference in the amount of saw dust going out the top.

As mentioned by others, with a zero clearance insert, there’s really nothing any under-cabinet dust collection can do for dust that actually comes out at the top. There’s just no airflow.

I think almost all the dust, that comes out the top, takes a ride in the gullets of the blade before getting cast off as the blade comes around.

The most significant thing I’ve noticed is whether there is an off-cut vs just trimming an edge (taking less than a blade width off). With a trim cut, the waste just spews out forward and to the side. When there is an off-cut, the dust is confined to the channel being cut by the blade. I think this helps to give the under-cab dust collection more of a chance to work.

I also suspect a lot of the dust is simply cast off via centripetal forces. Therefore the less blade sticking out the top, the less dust will come out that way.

I use my blade guard and overarm dust collection, and only have a shop vac connected to the main and overarm dust collection. That works fantastic. I hardly get any dust on top as long as there is an off-cut wide enough for the blade guard to seal against. I use that setup any chance I can.

A cross cut sled gives me less dust on top than a miter gauge. The slot in the sled helps to confine the dust. And, while it doesn’t reduced the total dust, the fence on the sled blocks much of it, so at least it doesn’t spray forward filling my pockets.

And sometime, I will place a scrap in a miter slot, and even a block of wood out front and to the side, just to act as a shield for the dust. At least the dust just piles up on top of the saw instead of being throw back at me. Just depends on what I’m doing and whether it is safe, given the cut I’m making.

-- Clin

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them700project

33 posts in 486 days


#6 posted 09-21-2016 05:15 PM

with my pcs I have noticed with most hardwoods i am covered after one quick rip without the overhead dust collection on. With it on its not so bad. I feel that the SS may be dustier than other competitors without that overhead.

with the birch ply I barely get any dust on the table

View UpstateNYdude's profile

UpstateNYdude

704 posts in 1450 days


#7 posted 09-21-2016 05:34 PM

Just curious because I don’t own one yet, but does it have shroud around the bottom of the blade with a dust collection tube, only reason I ask is my Grizzly 1023 has that and if a piece gets wedged in the tube and clogs it full of dust then it start spewing up tons of dust at me exactly as your describing, so I wasn’t sure if that might be the case.

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG

View Fred Hargis's profile

Fred Hargis

3950 posts in 1961 days


#8 posted 09-21-2016 06:36 PM

I have to disagree that the zero clearance is part of the problem. It’s not having the over blade collection that’s needed….the thing about having an opening in the insert is that even if you did, unless you’re trimming an edge the opening is covered by the workpiece. I have the ICS, a 5HP DC and I put the Excalibur overblade guard on it. I still get just a few pieces of just in front of the guard. the saw dust trapped in the blades gullets is traveling very fast, I think catching it all would be almost impossible. That said, there is a shroud around the blade in the cabinet, and if the hose to it is clogged with something it would be worse I would think. But using the factory guard with it’s puny port (and a shop vac) would be better than nothing.

-- Our village hasn't lost it's idiot, he was elected to congress.

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mlipps

88 posts in 582 days


#9 posted 09-21-2016 07:25 PM

Trimming an edge aside (I know this produces a large amount of saw dust), it’s good to hear that people get a significant amount of dust above the table when making cuts WITHOUT some form of above the table dust collection.

It’s just hard for me to fathom how some of these YouTube woodworkers achieve, what appears to be, dustless cutting without any above the table collection.

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clin

514 posts in 463 days


#10 posted 09-21-2016 07:52 PM



It s just hard for me to fathom how some of these YouTube woodworkers achieve, what appears to be, dustless cutting without any above the table collection.

- mlipps

My guess is the video doesn’t pick up the dust. The dust is moving quite fast and I think travels several feet within one frame. So I’m not surprised you don’t see dust coming off.

Videos are, of course, staged. So they likely clean things, take a shot, clean again, etc. Makes it all look a bit more tidy than it is in the real world. And of course, how many cuts you make. The one cross cut here and there. Not much accumulated dust. Cut 20 pieces or more in a row, and it starts to add up. Videos aren’t going to show you saw after making dozens of the same cut.

And as said, actual cut, type of wood, blade so on and so forth, makes a difference.

It sounds to me like you’re concerned there is an issue with your saw. In general SawStop puts a lot of engineering into their saws and I think dust collection is part of it. I doubt they cut any corners. I know my PCS looks well designed with the dust port ending in a shroud that surrounds the bottom of the blade. This would seem to encourage maximum airspeed past the blade. And in the end, that’s what’s needed to redirect dust particles that are moving at high velocity. I don’t see how it could be better.

Heck, I notice that when I forget to attach my shop vac to the table saw, it spews dust out the port. So just the spinning saw blade and general airflow of the saw moves a lot of dust out the port.

-- Clin

View MadMark's profile

MadMark

978 posts in 920 days


#11 posted 09-21-2016 08:18 PM

Your blade is dull or your saw is filled to the top with dust. You could also be using the wrong blade.

There should be little or no topside dust when ripping or crosscutting. Edge trims are always messy.

Think about how the blade cuts, it removes material as the blade enters the wood so the dust has nowhere to go but the gullet which should eject due to centrifical force. For you to get covered in sawdust means the blade is bringing up dust from under the table.

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

View Joshh's profile

Joshh

28 posts in 85 days


#12 posted 09-21-2016 08:25 PM

Nothing to read here, pass along.

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mlipps

88 posts in 582 days


#13 posted 09-21-2016 09:37 PM

@MadMark

I tend to agree with your understanding of the issue unfortunately I have a recently sharpened Forrest WWII mod #6 and my cabinet is completely empty (recently cleaned it).

Any other potential culprits?

Thanks,
(The other) M

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MadMark

978 posts in 920 days


#14 posted 09-21-2016 10:47 PM

Any pitch build up?

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

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mlipps

88 posts in 582 days


#15 posted 09-21-2016 11:11 PM

Nope. Blade is clean.

showing 1 through 15 of 23 replies

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