Dust collection tips - David Bedrosian

[Sominus]

https://canadianwoodworking.com/techniq ... ollection/

-also-

[sunnybob]

The value of every machine and tool in my workshop wouldnt cover half of the ducting in that pic. Wish I was rich.

[Sominus]

The value of every machine and tool in my workshop wouldnt cover half of the ducting in that pic. Wish I was rich.

He has quite a setup, that is true! He has slowly upgraded many machines and tools in his shop -- not sure if his instagram presence has gotten him some evaluation tools or not.

He is an engineer, and approaches his shop and woodworking as an engineer would -- his videos are fairly informative.

[Cherryville Chuck]

The cfm to run that system is immense. The amount of air needed to get sufficient air flow is proportional to the square of the diameters. So the flow of a six compared to a four inch needs to be 36/16 or 2.25 times as much.

[Sominus]

The cfm to run that system is immense. The amount of air needed to get sufficient air flow is proportional to the square of the diameters. So the flow of a six compared to a four inch needs to be 36/16 or 2.25 times as much.

But if the system is designed to operate on a (for instance) 6” main, then running at that diameter as far as possible will give the greatest bang for the buck, only reducing at the last segment (if necessary).

I believe he is saying (as many have said, including prominent members of this site) that reducing immediately to conveniently-available 4” pipe is a big mistake. He neglected to bring up the issue of grounding your conduit.

[Cherryville Chuck]

The cfm to run that system is immense. The amount of air needed to get sufficient air flow is proportional to the square of the diameters. So the flow of a six compared to a four inch needs to be 36/16 or 2.25 times as much.

But if the system is designed to operate on a (for instance) 6” main, then running at that diameter as far as possible will give the greatest bang for the buck, only reducing at the last segment (if necessary).

I believe he is saying (as many have said, including prominent members of this site) that reducing immediately to conveniently-available 4” pipe is a big mistake. He neglected to bring up the issue of grounding your conduit.

Mine, like others, splits right at the induction fan. If you have a heavy flow going through a pipe then bigger I would think is better. The heavy load produces drag and slows the air stream velocity. More space in the pipe should mean less drag and better flotation in the air stream. For something like a planer that could make the difference between working and not working. My 16" produces so many chips that I never bothered even trying to hook it up to a DC.I even had to take the 4" port off because it would plug up. I wheel it into the unheated portion of my shop and shovel them up when I'm done. I would also be spending a lot of time emptying the DC as it will fill a garbage can in a half hour.

For all the other tools a 4" is plenty adequate. My 8" jointer occasionally plugs but not enough to go to a 6". My tools are on two walls with the DC in the corner so the 4" Y is perfect for that setup. I used regular heating duct so that I could easily ground it to my panel ground bar. Some worry about leakage with them but you can always tape the joints with real duct tape (the foil stuff). I haven't found it to be an issue.