J. Phil Thien's Projects

Not an expert here by any means..  but my suspicions on the topic would be:

• CON: Circles are stronger than squares
• PRO: A square would slow the air below the drop slot, which i would think is a good thing

There, a tie for your pro/con list.  Hows that for helping!?!

All,

I wanted to say thanks for the great discussion and ideas on this board.  After suffing for many years with a perpetually clogged shopvac filter I cannot say how impressed I am with the effectiveness of the Thien seperator.  I did a little write-up on my blog.  It may be bad form to reference you there instead of re-typing everything : but I am going to do it anyway! :)

http://widgetninja.wordpress.com/2012/05/01/dust-seperator-for-the-cnc/

I cannot think of anything i would change or do different in the design.  My only add is to make a dolly of some sort to put the bucket/shopvac on the same platform for easier mobility.

-Rob