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Thanks, I will do that.
tom

Alan, you are so right... The darn things seem to multiply like rabbits and you never have one wide enough, thick enough or long enough. So, you end up wasting a bunch of time sorting through it...

I just hauled 4 trash cans full of wood scraps ... shorts mainly less than 2' ... to the street. They are mostly domestic hardwoods from several years of flat work that had just built up to the...

It left smear marks ... We were working with a material that was not a liquid, but when it contacted a surface at high speed it would leave part of itself behind. We called it 'make up' but it would...

Chris, I second that... adding unethical! ... I am still going to have my shop doors open on a nice day... ;} That said, I will have a 2 micron rated cartridge filter after the cyclone. It is the...

I would want the vortex below the tube as well... but it seems hard to imagine that you could have no vortex and then 1 inch later have a fully developed one. I am worried that it kills the inner...

I have a question on % efficiency you guys are talking about. Are you guys talking mass % of the total stream or a particle count efficiency? In other words, # of 10 micron particles separated...

One of the things we did with our cyclones to prevent re-entrainment ... something we used to have a lot of issues with build-up in the 'throat' was to put something we used to call a 'Chinese hat'. ...

It is an interesting catch 22. You work really hard to move as much air away from your woodworking device ... to carry away not just the chips and shreds but the fine dust as well...only to have...

Aleks,
My memory was you need at least 4 inlet diameters after any disturbance like an elbow etc. So, if you have an 8" inlet, you would need at least 32" of a straight run before the fan inlet. If...

We are getting to the guts of it.

Phil, i think you you are right and your references are helpful that the vanes are there to improve fan performance. That matches my own industrial experiences...

Yes, they are just below the Impeller on the suction side.

I can see how they would both protect the fan from big stuff... Especially strings etc. I also could see how it would improve fan...

My bad... it was a Jet JC-3... here is an image of the straightening vanes in the outlet tube.267357
This would seem to try to straighten the flow out or break the vortex before going into the fan...

I will get the hang of this yet... sorry here is the image of the vanes267356
Tom

My Bad Jim... did make a typo.
... it is a Jet Dust Collection System Model JC-3... JC-3CF to be precise. Attached is an image of the vanes ... The image is looking at the top 1/2 of the cyclone...

I recently acquired a used Jet DC3 for a good price. One thing I don't understand is why there are crossed straightening vanes in the tubular guard or air outlet tube? I have some experience with...