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Thanks for the kind words.

A few clarifications. Complacency is fine unless you are looking long term or build an allergic reaction. An allergic reaction can happen in as little as a few hours...

There is a lot of good information here and a whole bunch of things that bother me considerably. I spent way too much time looking over this thread and years trying to address the same basic problem....

Frankly, venting DCs outside with standard 30-micron filters is exactly how the originals were designed to work before our small shop vendors foolishly brought these back inside and added fine...

Lappa,

No, I don't know how to get those kinds of flows from a 1.5 hp dust collector. I oversaw three sets of magazine tests for dust collectors. Jet and Delta consistently tested as not only the...

Chris,

You are absolutely right and are seeing the same problem I had to address back in early 2000, except I had already landed in the hospital so was motivated to find a real solution. After...

Hi,

I received a few emails asking for help with this thread. Please for give the Imperial units as I am on the wrong side of the pond and untrainable at my age... So I'll jump right in...
...

Interesting...

I rarely post on the forums as just don't have the time to follow up on the questions. I was requested via email to maybe shed some light on this topic...

Woodworking makes huge...

Ian,

With the smaller impellers and 2850 RPM it is a good idea to build a larger cyclone body as you did. When I make cyclones for friends I do as you did and spot weld all together then seal. I...

You are welcome and have my permission to be quoted and hyperlinked...

Also, you are welcome to make suggestions toward my web pages rewrite.

bill

Dust risks and collection are really very simple, but there is so much bad information, equipment and advice that few have good dust collection or safe shops.

Woodworking dust poses numerous...

Shane,

I’ve put a few comments in blue. Hope they help.

Bill

QUOTE=wattlewemake;887458]Hey…

I am working out of a 2 car garage. Double tilt a door front and a single roller door at the...

Zelk,

Although we could do the math, it turns out my shop is just a bit bigger than yours and a big normal 120V AC exhaust fan in the doorway works great. I tried at first a little box fan then an...

I spent a good part of late 2006 and 2007 traveling around and testing air quality in various woodworker shops. Except for a very few shops almost all tested with dangerously high residual dust...

Reuelt,

I've included some brief comments in blue.

bill

Reueit,

Your numbers 1, 2 and 3 are almost always at the most risk from fine wood dust exposure. These are the ones who most often choose to work with the more toxic woods and often foolishly work...

Hi Mates,

When we talk about woodworking dust collection we get ourselves into the middle of a vendor created confusion of identical terms meaning very different things. We have had standards to...

It seems that I get a touch more email than most on the subject of dust collection from my Cyclone and Dust Collection Research web pages, roughly four to six hours worth a day. Anyhow, I have gotten...

Al B,

Here is a link to the Clear Vue site where Louie (Davis Less) has shown off his pretty amazing cyclone information (Louie's Godzilla cyclone). I would like you to add your set of pictures...

Al,

I think the best working gates are those with a through plate where when open a hole in that plate lets the air pass and when closed the plate blocks the airflow. Unlike less expensive gates...

Tucked my two cents into your posts in blue.



Barry & HiString,

The other thing I wanted to share is more on this sizing the cyclone issue. I really hope I did not put you off with what I...

Oops.. just a little caution here. The smaller the cyclone diameter and chamber the bigger the motor and impeller required. The tighter the separation spiral you force the air to go into, the more...

Very well done and nice pictures.

You will have to bring me up to speed on any areas where you think the web pages can use a little help or your pictures instead of my words. Can you believe I...

It turns out that enough people complained besides me that eBay pulled down most of the plans, software, and other intellectual property being sold by Jandelgifts. He did get eBay to pull down one of...

eBay removed my ad because I used some of Jandelgifts wording. eBay refused to accept my expensive VeRO complaint FAX because I sent it to the U.S. office on an eBay Australian form. Turns out the...

eBay cancelled and removed removed my competitive listing(s):

5508458017 PLANS FOR PORTABLE PROFESSIONAL MASSAGE TABLE

"for violating our Image or Description Theft Policy. Please read our...

PAH1.. You are absolutely correct.

The first item is fraud. The eBay seller Jandelgifts used first my picture of a professional quality massage table to foist off poor quality plans. When I...

Stinky.. thanks for the tip. I was only able to go back a month and found 35 sales of these plans.

1. I contacted my attorney. He said this is a long major expensive war hardly worth fighting,...

I put my own eBay ad up using my own pictures, etc. offering anyone who wants a copy of the plans the opportunity to get them for free off my web pages. If they are kind enough to make a donation as...

As my good friend Barry in Adelaide would say, Thanks Mates!

bill

Years ago I put up a web page http://BillPentz.com/massage that shares out my detailed plans to build a really top of the line massage table. That page was copyrighted, meaning individuals are...

Pat,

I only get a few tablespoons of dust in my filters from a full barrel. After maybe 10 to 15 barrels I can send that dust out into the front yard grass and it totally vanishes. Alternatively,...

Size of a 2 hp impeller for a dust collector with minimum ducting or flex hose should be 12" in diameter with six or eight blades each 3" tall. See the pictures on my web pages for blade shapes and...

Barnsey & Friends,

You know I kind of like this site. It is one of the few places I can visit and still be a junior member!

Sorry there are so many dimensions on my cyclone plan, clearly my...

Wayne,

No problem on the bag then, just wanted to save you some grief.

That page on Airflow Measurement is near done, have a couple of more graphics to do with just place holder in the spot on...

Wayne,

A little heads-up on the plastic bag. An air leak in the drum or connection with pull that plastic bag right inside the cyclone in a jiffy. Either put in a liner or a weight in the bottom...

Zymurgy,

The air ramp or a variation is often given to college math students as one of those nasty test problems. It turns out you can not solve this one quite so easily. Its length is easy to...

Pat,

Thanks, glad I could help.

bill

For the dust bin, I just unlatch the lid, and dump the barrel in the trash. For the filters I have a little cleanout on the bottom that fits a 4" hose. I snake a 30' hose off of that cleanout to...

Wayne,

With just too many questions about the detailed building steps, I added more to my pages with very detailed instructions:


Take a look here and let me know if these would have helped:...

Long time user/owner of the combination machines.

I currently have both the Inca joiner/planer, the Robland Tablesaw/shaper, the Robland joiner/planer/mortising table, and a ShopSmith. I've owned...

Paulbear,

Seems as though a million years ago I ran over my father's Estwing with the lawn mower. Not a good scene, but was lucky as only wiped out the leather handle. He bought that hammer new...

I would recommend that you contact www.oneida-air.com They have a pretty good design service for which they only charge $50. Work with them to get them a complete drawing in the format they need. The...

Wayne,

No pictures of my push-through setup. I only put it together long enough to test. What I did was put some extra long rods on my Jet DC-1100 and used a cyclone in place of the bag tree. I...

Ken,

Not to steal Wayne's thunder, but there is now a nifty catch hood that sits behind your miter saw to get most of the dust, or you can make your own.
...

----- Original Message -----
From: Wayne_Davy
Subject: Push through cyclone question

Hi again Bill,

Thanks for your comments on my cyclone pics (posted on www.woodworkforums.ubeaut.com.au). ...

G'Day Wayne,

Well done on the cyclone!

For the blower I recommend a backward curved material movement impeller such as the Jet DC-1900 that is about 355 mm (14") powered by a good heavy duty 3...