J. Phil Thien's Projects

In any sort of flow (air, water, etc.) the more or a radios the more residence which slows down the flow.
If you search for "dust collectors ductwork layout's" you will find using 90's is considered a no-no any where.
If you 'have' to use a 90 it normally performed to use two 45's with a strait pipe between.

Do an experiment and see what you find out for yourself.


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If you find there is leakage around the rim of the can, another suggestion would be to put a bead of non-harding silicone in the groove of the lid and thin it out to around 1/16 - 3/32 thick and let it dry. Did that to a lid i just made and it worked great.

Also maybe use the handles of the trash can and some bungy cables to really secure the lid to the rim, kind of like this:
http://www.jpthien.com/smf/index.php?topic=383.0

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Your ideas, time and effort has helped me a great deal, thank you Mr. Phil Thien.

While doing some research about Dust Collectors many blogs and forum threads pointed me here, while peeking around the forum here i came across vawoodworker84's 6" model and i like the concept and decided to make my own for a 6.5HP shop-vac.

Took vawoodworker84's idea, made it alittle smaller (2.5" ports for shop-vac) and rounded the top instead of an octagon.
Dont have any real way to test the vacuum, but "by touch" (holding my hand over the end of the hole) it seams to have close to the same suction as a direct hook to the shop-vac.

Heres some images: The "sheet-metal" is extra coil i had left over from when i re-sided my house last summer.





The "inner cylinder" is a smaller drum whihc i chopped the bottom off and inserted so the garbage bag does not get sucked out.



Nothing really too special about it, but if you want to read alittle about the process you can here.




Again, thanks so much for your site, Thien - it has been a huge help.