J. Phil Thien's Projects

hi there.
i have seen on a few threads that people have rounded over the slot ,some have chamfered the top ,others the bottom.
is there any advantage to this and if so what way should it be

thanks alan

hi there. i am planing on blowng the fine dust out side.
i have one of those extractors that the impeller housing and the ring the bags mount to is one piece. i will use a seperate seperator before the dc unit.
i am thinking of a second baffel inside the second ring and a bag below . an open enough material across the top of the ring and a 6 " flex pipe up to a stainless  pipe going out side.

does tis sound good.


what should i put on the end of the pipe going throught the wall to stop vermine etc and water coming in the pipe

thanks alan

hi there.
great forum and great product.
i started down the metal cyclone route but hit a dead end  looking for someone trust worthy and good enough to weld it all together. \i had hears about this design and passed it off thinking it wasnt any good and started the cyclone. then when i stoped the cyclone i said why not try the baffel idea . so i did. i used a small barrel with a sealed lid adn suspended a baffel from it.
i couldnt follow the plans on that one as it wouldnt work with thwe barrel . it works great with my festool ct22 extractor, even thow it isnt built properly to scale etc.
anyway now i am back needing a big seperater for my workshop  system that i am abou to put in.
i was hoping to use a 80 gallon (not a us gallon but british or eu ) or a wheely bin (not sure of the us design but over here they are a square cross section tapering out as they go up  and have wheels and a flip up lid).
i am not sure if the wheelybin will hold up to the pressure   or not (on my smaller one, the barrel gets sucked in a bit so i had to bolt pieces of wood inide to stop the plastic bending in.
i see that the normal design is for a 4 "pipe system. should i adjust the size to suite the 6" pipes.should th eoverall radius of the baffel be made larger to  allow for the increase in inlet size.
i was thinking of making it a horezontal inlet design.
i am going to upgrade the power scourse by buying anouther chip colector(with the impeller houing seperate from the ring for the bag etc) and using the whole housing  and motor  and bolting that above the baffel. the online store selling the dc unit says it will moove 3900 m3 an hour(over 2200cfm if google is right). given that those numbers are inflated  at times  a bit. do you think that is too much for the  baffel   . will the high cfm suck the dust up before it gets to drop down through the slot

any advice would be aprieciated
thanks alan