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Project Information

So, I got a new table saw, and I really like it. See the review I posted titled "Decisions, decisions". As I stated in that review, the dust collection off the top of the table is non-existent. I have always been frustrated by the back of the saw blade throwing sawdust back at me while making through cuts. Even with the riving knife installed, it still was a significant issue. Some saws (including one I contemplated getting instead of the Grizzly) come with dust extraction built into their blade guards. My Grizzly G1023RL comes with a pretty stout blade guard, but it has no dust extraction feature included. I tried to rig something up to the included blade guard, but that didn't work. So, I decided to engineer my own. I don't like most of the aftermarket "Overarm" systems that are available. They are just too cumbersome, and in the way too often. I wanted something that could be easily raised completely out of the way when not being used. But it also had to be easy to lower it back into place when needed. You know how it is… the more difficult something like that is to get set up to use, the less likely you are to actually use it. After a lot of internet research, I took the elements I liked most from several different ideas. The heart of the mechanism is the "scissors extender" device that I made (out of wood of course, or I couldn't post it here in "Projects"). As you can see in the photos, when not in use, it retracts up to the shop ceiling and completely out of the way. When I need it, I just tug gently on the counter-weight that I have rigged to it with a couple of pulleys. It lowers right down to whatever height I need it at. It hovers just above the blade, and my work piece doesn't even contact it. One thing you can't see too well from my photos is how I modified that black shop vac hose adapter. I cut the bottom edge off on the bandsaw, so it is completely open along the entire edge. I allows me to lower it enough to cover a good portion of the exposed blade depending on how thick the material I am cutting is. It works great on true "through cuts", and harvested very nearly 100% of the saw dust created above the table. The only shortcoming is when you aren't taking a cut that has wood on both side of the blade. Like when you are just trimming an edge less than the width of the blade. In that scenario, it still kicks out a fair amount of dust to the front and left of the blade. I read similar complaints about most of the factory available and aftermarket options out there. I guess that is a compromise I can live with, until I find a better solution. There is also a short video available on Youtube. Just search "Table saw topside dust collection"



25 Posts
Why you clever…I Love IT!

4,323 Posts
What a monster construction you have there! well done.

Like all woodworking tools that produce wood dust, the ability to effectively to route them anywhere but in your face seems to be lacking right from the design stage, the enclosures have so many openings its very hard to get effective removal without limiting the features of your machines.

I have even fully enclosed spaces reto fitted fans in an atempt to extract dust all of which have a minimal effect.

With various table saws I have tried:
Blocking in the cast table top space with EPE and using metalised A/C Duct tape to hold everything in place.
Fabricating a complete bag over the Contractor saw motor so everything tilted and moved as required but all it did was collect more dust.

I made crescent shaped blocks for the tilt openings, this produced the best results in improving dudt extraction but limited functionality.

On my spindle moulder
I again I blocked in the cast table top space with EPE and using metalised A/C Duct tape to hold everything in place, and closed in all the vents added a series of three 4" or 100 mm computer type fans to provide positive pressure inside the cabinet with the intention to stop chips from droping into the cabinet void, but not so strong as to blow all over yor face as you worked. Again limited effecton extraction improvement.

Add a Zero Clearance insert and chips will definately appear table top side.

Your design would definately work well in this situation.

The removal of dust and chips is all part of good woodworking health and safety practice and goes hand in hand with your machine upgrades, upgrade to bigger equipment and you may have to up the dust extraction as well.

Thats a evil looking saw blade you have fitted …what are you cutting with it?