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SMF - Just Installed!

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Topics - Adam

#1
Here are the basic steps I followed.

1)   Trace the patter onto the can
2)   Use a dermal and make short work of cutting the opening for the inlet.
3)   Tape the pattern onto the Inlet tube.  I used snap together metal AC duct for this. 
4)   Use tin snips and cut out the pattern before snapping the metal into a tube
5)   Move the patter about 2? down from where you just cut
6)   Cut tabs back to the new location. 
7)   Attach Tube to can alternating tabs to the inside and outside of can.
8)   Pop rivet in place.   
9)   Caulk with Air seal. 

I used this website to make the templates for intersecting the inlet tube with t trash can: http://www.harderwoods.com/pipedocs.html

This took just a little time to do, most of it was making decisions on how I wanted to do it so I thought this write up might help some one else.  Otherwise, it went rather quickly.  Drilling out all the pop rivets took the longest mostly because I stopped to calk under each tab as I went along. 

I haven?t taken pictures of the baffle yet, but it is down and has a HF mini DC unit installed on the top.

The separator works rather well, I cleaned up my shop floor and all the dust ended up in the can with none in the bag.  My only complaint seems to be with the HF mini unit.  It doesn?t seem to have the suction power I expected it would.  I?m using a 10? flex hose and the Rockler master system.  When vacuuming the floor you really had to be completely over the dust before it would pick it up.  It also didn?t really have the power to suck up anything heavy like a screw which my shop vac would have grabbed.   Is there something wrong with the unit or am I expecting more than I should? 

#2
I?m looking at doing something like this?
http://www.jpthien.com/smf/index.php?action=dlattach;topic=27.0;attach=41;image
http://www.sasmopeds.com/dd2.JPG

In doing so I?m look at getting a HF portable DC like the one shown.  So my question is:

Why is this unit
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=94029
cheaper than this unit?
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=31810

They are both 1 HP but the more expensive one is rated for less CFM?  I don?t understand the reasons for the differences in cost and CMF?  Does the cheaper one have a cheaper motor that will break or something?  Otherwise it seems obvious to go with the one that cost less and has high CFM.