I am looking for advice on how to reduce, if not eliminate, the dust nuisance that is my 10” cabinet saw. It is a Chinese-made OEM that is sold under a number of brands here in New Zealand and other countries.
I have been using this for a number of years and putting up with it being a very dirty saw – dust piles up underneath and is flung into the air above the table, despite having overhead dust extraction. My workshop fills with dust from this beast and I am worried about my health as I have now developed a persistent cough.
The table features:
- open bottomed cabinet
- 4” dust port, which is connected by 4” flexible duct to the side of a shroud covering the blade. The duct opens right next to the bottom of the blade
- riving knife that goes down through the insert plate and is connected to the blade assembly. It has an overhead guard attached
- The overhead guard has a 1” dust port ( To which I attach a separate shop vac)
- standard insert plate This has quite a wide slot
I have embarked on a pogrom to try and eliminate this machine’s dust nuisance as far as possible.
I used an article in Fine Woodworking Magazine as my basic guide (http://www.finewoodworking.com/workshop/article/dust-proof-any-tablesaw.aspx) and did the following:
1) Closed off the cabinet to increase suction though the insert plate. I did this by:
a) Installing a false floor in the cabinet under the motor
b) Using foam to close-off the gaps between the top of the cabinet and the underside of the table
c) Covering the tilt adjustment slot in the front panel with duct tape
d) Using foam draft-excluder tape and duct tape to seal the removable side panels
2) Installed a zero-clearance insert. I now don’t use the riving knife(splitter) or the overhead guard/dust extraction. (if I continue with this mode I will install the Micro Jig splitter for safety)
3) Drilled holes in the side panel next to the motor to allow some cooling air to pass across the motor
The result has been a noticeable increase in suction at the insert plate (I use a 2hp dust collector connected to a Dust Deputy cyclone, which provides lots of suction).
However, I am still getting fine dust thrown off the top of the blade. This is obviously withstanding the trip down into the cabinet, past the 4” dust collection duct, past the suction coming down the back of the blade, and then being ejected from the blade at the apex.
Also fine dust and tiny chips are thrown forward as the piece of wood is finally cut through.
The good thing is that the inside of the cabinet now remains clean, but it is the airborne dust that is coming off the top of the blade that I am trying to conquer.
Does anyone have any idea of what I might try next? I already wear a powered respirator and have a workshop filter running.
I was wondering if the OEM blade provided with the saw (recently sharpened) might not be as good at releasing dust as some other brands.
I hope that you can help (cough cough)
-- Max, New Zealand