Hi this is Bill Pentz. Most of your cyclone and blower are evolved from my designs that I have been refining since 1994. You have done a pretty good job, but there are a few things that you need to consider for safety and ability of people with lesser metal and woodworking skills to be able to build your units. 1) the 1/4" plate is heavy but is the right stuff to use for your impeller base. 1/8" plate will warp all over unless you have a very fine welder and good heat sink. 2) Your noise levels at over 100 dB were not unexpected but can be greatly reduced with a few minor changes. a) You really do need to be using backward inclined blades. If you divide your blower into six equal pie shaped wedges, then you should offset your blades 2.5" from those division lines to create backward inclined blades. Backward inclined and your already backward curved blades make a huge difference in blower noise. b) You also need to sharpen your blower gore point instead of a gradual curved bend and add a second matching gore point on the inside outer portion of your blower to create a noise canceling effect. Sharpening gives you better performance and a level of noise that can be canceled. c) Also, I chose to weld on both sides of my impeller blades. If you just weld on one side, it should be the blade backs to reduce turbulence to also help with noise. 3) Your cyclone and mine are identical except I continue the cylinder up instead of just closing off with the air ramp. Many are poorly copying my design both ways now. The advantage of coming up is you save having to add a duct piece on the front of your blower and can just make a 9" diameter hole. You need that same sized duct coming out of your cyclone if you want optimum separation and airflow for an 18" diameter cyclone. 4) I found bolting the motor directly to the Baltic Birch plywood and using Loc-tite holds up for a while, but eventually vibrations cause the Baltic Birch to fail. I shifted over to using a steel motor mounting plate that I hold in place similar to how you hold your blower intake duct. 5) I found having my blower base and blades laser cut costs little and greatly minimized balancing. Also, I made my base have a tight fit to the compression bushing arbor which reduced runout and made for a smoother less wobbly impeller. 6) I also tried mounting the metal blower sides to the Baltic Birch. Turns out they will eventually develop openings from being banged hard by debris when you forget to empty your collection bin. A better technique is to make the blower larger in diameter, securing with carriage bolts outside of the metal which rests in 1/8" deep grooves in the Baltic Birch. 7) You can buy ducting flanges in the diameter you want that have a flared base and foam insulation making it far easier to install than the complex hole. 8) Many will want to make their cyclone and blower parts from galvanized steel. Galvanized reacts with silicone to break down and lose its seal. You might instead want to use a good gutter sealant. 9) you can take your identical sized blower vanes and move them out on the same sized base to create a larger overhang and 16" total diameter impeller. I found with these 4" tall blades, that is the ideal size to use your motor full capacity without risking burnout from moving too much air. 10) Please don't ever turn on a newly made impeller that is not encaged in a blower housing. One of my buddies started making impellers for me and he had bad welds. A blade broke loose and destroyed the blower housing plus the whole rest of the impeller before I could kill power! Bill Pentz billpentz.com/woodworking/cyclone/blower.php

I know your struggles on the back side, it’s something I go through. glad to see you making progress and getting another build up. Take your time we will wait .

Always amazed at the carefulness and attention to detail you put in a project. Awesome video once again!

I love the the squiggly seal, efficient and good looking!

“We don’t know what 3phase is in the US” gave me a good chuckle. Good seeing you on camera again.

Awesome work. As far as butt welding sheet metal - you want to stack tacks. Tack every 2", then come back and put a tack on each tack. That will move your heat around and minimize distortion. Also prevents blowing holes in the the metal. Other than that, awesome work buddy. Leagues ahead of me.

Great build. No doubt, a better blower than my one. I like the idea of bolting the housing to the motor and having the opening for installing the impeller on the bottom. Makes more sense now that I think about it. Do you want to install an inlet screen to protect the blower from large pieces?

Awesome to see you back Jer, and also awesome to see some build videos being successful on KZfaq. The algorithm really beats them down these days. Keep up the awesome work, you're quickly turning into the next Matthias.

I like your thinking on the wiggly bits, and love when what looks like decoration is actually functional industrial design.

Can‘t wait to see the last video … it‘s always a joy to see you working … I like the way you find solutions for the process and the result is outstanding. Thx for sharing

I'm from Ukraine, I've been watching your work for a long time, I want to thank you for the accuracy, honest attitude to work, I'm a teacher of labor, wood, metal, I'm older than you, but you teach me, THANK YOU!!!! SORRY FOR MY BAD ENGLISH.

Another build that is outstandingly detailed, well thought out, and an excellent example of fine craftsmanship! Great job, Jeremy!

Normal household Silicone sealer is a bit too soft to stand up to basically being "Sandblasted" for very long but, on the flip side I am sure the same joints would eventually get packed with saw dust anyway so it only has to last long enough for that to happen. For future (re)builds I would recommend some good quality automotive seam sealer like "SEM 29372 Gray Seam Sealer". The nice bonus part about the SEM tubes is that the nozzles screw on, which makes unclogging them or even replacing them entirely so much easier. The downside to SEM sealant is that its too good at being impermeable so it takes some specialized paint to get it to stick to it.

GLAD TO SEE YOU BACK TO BUILDING THINGS. I'V ALWAYS ENJOYED SEEING WHAT YOU COME UP WITH NEXT. KEEP IT UP.

I’ve missed you on KZfaq. It’s great to see you back. I hope to see more of your work as time goes by. Thanks for some interesting, educational videos.

So nice to see someone with natural feeling for geometry at work. Making smart use of stuff available.

So good to have you back mate! Was super happy to see the jer notification

So beautifully designed and executed. that thing’s a piece of art

Yes, the fine kreg screws are excellent for Not splitting. Great work Jer, as usual. Please send rain !!

Dude, thanks for showing us your process. Have a nice day.

Your skill level and attention to detail is phenomenal. I’m looking forward to seeing the fun part when you put it all together.

I’ll say it again. Totally amazed with your problem solving/solutions to your build process. Truly impressive!

Each little section is a project of perfection in itself - and then you put them all together into a serious tool! Very impressive work!

My first job in Brazil was to make these snail exhaust fans and air recirculators for gas ovens for curing powder paint.

I am in my 50's and I have been fabricating things since the late 1970's ... your skills and methods are impressive!!

glad your back been missing ya

I get the same joyous feeling watching you(r videos) as I get watching Lionel Messi playing soccer! For those not in the knowing; one of the best players ever to walk the pitch.

great use of maths and geometry designing your parts. you're smart in finding solutions

Rocket science :-) Amazing !!! Everything looks easy ... but it's not. The detail is not (never) an option with you !!! Bravo !!!

I really love that you are back posting more regularly, I have been watching for years and still drop everything when I see a new video from you! Thanks you for making such great videos

i really enjoyed watching your thinking process during this project. You're a wonderfully talented and kind man. Thank you!

As usual magnificent engineering and execution

Just gorgeous fabrication. Loving the efficient use of materials and accessible tools. So good to see you back in action.

Can't wait to see the whole thing assembled.

I love the aesthetics, Jer! Great to see you back creating, and sharing it with us. Hope you're keeping well.

So glad to see you back - great build as always.

Wow, that Leeson motor is a beast.

Jer, incredible engineering as always. I love you narrating the details. Explanations. Fantastic.

Pure genius. Thanks for letting us into your mind.

You seem a lot happier now. I like your new content even more then I liked the old.

I said it once and I say it again: Continue like this and one day you'll score a job at NASA, building spacecrafts. Absolutely brilliant work.

Glad to see you posting videos again. Welcome back

Excellent progress. I’m so looking forward to the next instalment.

Nice work, as usual. I think it's cool you're using only clear finishes for both the wood and the steel.

A nice little project but sometimes what I find most interesting is the simple and effective way you develop fabrication methods to accomplish the build, Bravo.

I'm a week late, but I'm so excited to see another video by you! ♥

Amazing build quality! So glad to have you back making content.

Im working on building my own dust collector, this is exactly what I need! Thank you!

Jer - Its good to see you making videos again. I hope all is well in your world and, as always, your work is perfection!

Thank you. Your efforts are a pleasure to watch

Love it. The way you made that cover, making the little wavy bits individually and then gluing them to the disc, was class. Great build, really enjoyed it.

Very inspired by your attention to detail and the amount of care you put into your projects!

I'm just 13 mins in, and don't really do any work like this, but it's really impressive how resourceful and creative you are with repurposing shop items. Using the drill press stand as a mandrel, or the drill bit as a router guide, testing the screws in the plywood... It's not so much about the specific tips, or how to build this exact item, but the philosophy of being adaptable in completing a task. Fun to watch.

This is such a clean build. Very well done. 👏 I love the look of the wiggly sections. Form from function at its finest!

I love your material usage measures. I really need to start thinking like that. The “wiggly bits” make it look really cool. Definitely was worth it.

Nice job Jeremy glad your back in the shop again.

Glad to see you back. 👍. Your videos always provide inspiration and demonstrate problem solving I can apply on other projects even if I'm not building the same things. Thanks for all you do

Nicely done, Jer. Glad you're back!

Glad to see you 'back on the horse' and working on projects again. All the best from Australia, looking forward to the rest of this project.

Good to see you back

JEREMYYYYYYYYY, I love your videos more than any other content creator on this platform, nice hairstyle you're rocking!

Love it. Always enjoy your work. Can't wait to see the rest of the build.

Beautiful design. Glad to see you creating again. For welding thin metal try series of spot welds, cooling with shop air between passes, instead of continuous bead. Very thin gap will allow good penetration. Loved the rabbet detail so sheet metal would be flush and help alignment.

Love your video style, length, level of detail. I'm so pleased you're back posting, even if it's less frequently

I'm always amazed at how smart you are and how interesting you're able to make your videos. Thanks,

You are an absolute genius!!!! Love your content! Glad you are back

Great work Jer, its coming right along. Thanks for sharing.

Your cyclone and blower look like they will last forever and work extremely well. They far outclass the ones I made. You can take as much time as you like and I will always be happy to see a new video from you. This was not a long wait.

I really appreciate all the jigs and fixtures you use. Very clever.

GREAT WORK - many thanks!

Just awesome so far. Can’t wait for the final outcome! Nice work!

DAMN this KZfaq algorithm! I didn't see that you're back! We missed you

I love how everyone building something looks at the numbers on their test meters and says something along the lines of "it's using a bit more "

You're on another level, that's for sure. Kudos from Brazil.

Great work Jer. Nice to see you and your videos. You are a brilliant person.

Thanks for another great video! I remain impressed with your problem solving skills and your thrift is most definitely appreciated. Keep up the excellence!

Amazing as usual Jer absolutely great work loving your new workshop

Fantastic build Jeremy! Your attention to detail and execution is amazing! Looking forward to Part 3 of this build. Be well..... 👍👍

I always enjoy watching you work. Interesting, informative, and impressive. Thanks!

Appreciate you and love ❤❤❤

You are one of the best builders on KZfaq IMO....i love when you post videos

Never cease to be impressed by your sound thought process. Amazing engineering and inventor mix. I’d be curious by a financial breakdown of your final assembly.

Magnificent.

Good to see you back with another amazing build.

Always good to see you post

A neat and lovely build! Thanks for sharing.

Amazing work.

Brilliant. Excellent video.

Wow. The result is awesome.

Nice job. That impeller should last a lifetime.

Amazing attention to detail. Superb job

I love watching your jigs and setup work. The real secret sauce.

Good to see you back. This is a great build. Be well Clint

I'm only 7 min in, but I love your ingenious use of jigs and geometry, and how you made and bent the vanes. Brilliant!

This is the most impressive and best built dust collector blower what I have ever seen in youtube. This must pull A LOT of air. I can't wait to see more progress of this system 👌

Masterpiece as usual.

Fantastic build dude. A really professional look about it. I am so glad to see you back on here mate it was so long since you made a video prior to these. Great video buddy 😉👍🏻👍🏻

Jer, it's really coming together! Heavy metal is just all right with me! 👍👍

this guy is an absolute madlad!

Genius. Nicely done.