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dust-collection-funnel-company He also supports a forum to discuss his design - accessed from the link above. Probably not good options, unless you only do it with the air coming out of the cyclone, after most of the chips and dust have been removed. Then the filter in the shop vac stays relatively clean, and operates at high efficiency, without spending lots of time cleaning the filter or vacuum. But I have found the 3 mil "Construction site cleanup bags" from Home Depot and other dust collection funnel company quite adequate at about 35 cents each. A wide selection of cartridge types, options, and accessories enable the collector to be dust collection funnel company to specific application requirements. But his design of the Thien Separator appears very effective.

Designed to serve a single source or a system of multiple sources, it saves energy by recirculating clean air. The AAF ArrestAll has been engineered for years of efficient service in such intermittent applications as woodworking, grinding, polishing, packaging and venting with reliable off-line cleaning.

It is available in modular configurations for almost unlimited airflow capacities. Choose from bin vent, flat bottom, or funnel bottom dust disposal arrangements, with either standard or extra wide pocket spacing. An automatic shaker is standard on sizes AR to AR Sizes range from 3 to 25 horse power and to 12, cfm. The AAF cartridge collector system is a completely modular design that allows an unlimited range of sizes. The compact modules help conserve valuable space, and can be interconnected to accommodate the largest air cleaning task.

The aerodynamic design permits free-fall of dislodged particulate into the hopper without direct impingement of contaminant on the cartridges, minimizing abrasion and dust build-up. A wide selection of cartridge types, options, and accessories enable the collector to be tailored to specific application requirements. The kind with a couple bags. The original system had a very good airflow, but I finally figured out why The corner of the shop with the dust collector was being caked with a layer of dust.

And with a lot of dust that I could see, it was also mixing the fine dust that I couldn't see into the air for me to breathe. The first fix was to get 0. The vendor insisted that I wouldn't have enough airflow unless I had those bags on both the top and bottom, so I installed two. System worked great for a few minutes, but then the bags plugged. The chips and dust embedded in the lower bag, and fine dust plugged the upper bag. Lets see, woodworking for 15 minutes, then 30 minutes with a shop vac, working in a cloud of dust, trying to clean the bags enough so that they could be used again for another minutes.

Didn't make sense. The custom bag they made for my 2 hp collector is about 3 feet in diameter, and reaches my 10 foot ceiling. The bottom bag could be plastic - the air would exit through the top bag, and the accumulated chips and dust from the top would drop in the bottom bag.

The performance of the large felt-like bag depends on the "cake" of fine dust on the inside of the bag, providing the fine filtering. Therefore a big bag is required to provide adequate air flow through the cake and felt. It was a big improvement, but not the final answer. Another solution looked good, but I haven't tried A bar is often included, to knock the dust off the pleats inside the filter, but that puts substantial wear on the relatively expensive filter cartridge. Breaking news - if a baffle is installed to keep the chips away from the cartridge, like the Thein separator described below, that helps the life of the cartridge.

I also learned that banging the top of the cartridge, where there are no pleats, may jar more grunge out of the filter than the paddle some systems provide to bang on the inside of the cartridge pleats. A couple other problems with a single stage collector. First, the dust and chips go through the fan. Better hope you don't pick up a nail or screw and certainly don't use the optional "floor sweep" , because that metal piece can cause a spark when it is hit by the fan, and that spark can smolder in the dust for hours before catching fire in the middle of the night.

Second, the air and grunge are blown into the filters before they drop This is sometimes called a two stage dust collector. A high volume of fast moving air can carry heavy chips in addition to fine dust. Air from the machines is spun around a funnel-like "Cyclone", and as the air spins around and down the gradually narrower tube, it slows, dropping the dust and chips into a bin below the first stage. With a perfect cyclone, Dust Collection Funnel 05 the air stops at the instant it changes direction from around and down, to being sucked up the center, through the fan, and out.

If it stops completely, all the dust is dropped. If it just slows, the chips plus most of the dust is dropped. If there is an air leak at the bottom of the cyclone often at the seal of the trash bin the airflow is disturbed and a lot of dust remains in the air. Note that normally most of the debris is gone before it goes through the fan and into the filter. The filter after the fan is typically a large, very fine filter, often a pleated cartridge the second stage.

However, with little dust left in the airflow, there is little contamination of the filters, so the filters remain very efficient. If you have a cyclone and the filter gets plugged frequently, something is wrong with your setup - likely an air leak at the collection bin, or you should contact the vendor.

There are huge battles about different types of cyclones. Almost any circular container will drop the chips and "look good" but a slight turbulence in the air from a less than perfect shape or air leak, and the efficiency plummets - the fine dust is not dropped. The fairly tall cyclones that do the best job of dropping dust and chips don't fit within the typical small shop ceiling. Shorter cyclones either require much higher power or become less efficient - don't separate the dangerous fine dust.

Bill Pentz designed a cyclone for optimum performance and published the plans on his web site to allow woodworkers to freely no royalty build one for their personal, non commercial, use. Parts of the design were stolen by vendors who didn't pay design royalties required for commercial use , and other parts should have been stolen - Bill can demonstrate that many of the highly regarded cyclones aren't very good at separating the very fine dangerous but invisible dust.

Experts who are not trying to sell a competing product generally agree that Bill's design is excellent. ClearVue Cyclones is the only vendor currently licensed to use Bill's design in a commercially available cyclone. The ClearVue founder, Ed Morgano, retired, and when he stopped taking orders on May 1, , I feared the death of a good company.

A couple months later July it was bought by Bushey Enterprises, three brothers, who moved the manufacturing to Seattle, with office operations in Burlington Vermont.

In August manufacturing is moving back to South Carolina. Wherever they are, the business is continuing. What cyclone to buy? I have heard at least as many bad comments as good about JDS dust collectors. Penn State Industries sells the Tempest dust collectors, but they don't design and build them. Grizzly specs look good, but the user enthusiasm on the woodworking forums is not convincing - Grizzly cyclone users are happy but far less enthusiastic than users of some of the other Grizzly machines.

Shop Fox is a close corporate relative of Grizzly. ClearVue user reviews are always positive. Oneida seems to have good user reviews. All these notes are based on second-hand discussions, not on first person experience. I helped a friend with a commercial shop select and install an Oneida system. He was very complementary about this web page until I got to the point of recommending Oneida. Bill said "Please rethink that recommendation.

I think the Oneida Air System cyclones are probably the worst choice that someone can make today due to terrible separation, poor filtering and way too little airflow in all but their 5 hp and larger units.

She was very complementary about this web page and the need for dust collection at the source. She goes on to say "I am sorry to see that you have given a forum to Bill Pentz and his anti-Oneida rhetoric. I would ask that you remove his negative comments and understand that he has no foundation for them. Trying to understand the battle, I have done some more research Despite the clean appearance, he ended up hospitalized with lung and heart damage that was traced to shop dust, bad enough to require full time oxygen.

As a professor he started researching the problem as a one-time professor, I know that is a very natural thing to do. He became an expert and found most commercial designs didn't hit the target. He offered consulting services to vendors, and testing services to magazines. He pointed out that most sales claims and magazine tests were not meaningful in practice.

His testing showed that most commercial designs were inferior to what he felt necessary. He designed a cyclone to meet the needs of a small shop, and offered the plans free to individuals to make one for their own use. Today only ClearVue manufactures a cyclone following Bill's design and pays him a royalty for the design , but you can build one yourself for personal use without royalty sounds like a professor to me.

I don't know the details of the Oneida - Pentz battle. I don't know who was right or wrong. I am not sure I could judge the case on it's merits, so all I can do is report a battle between Bill Pentz, one of the world's leading experts on wood dust collection, and Oneida, one of the leading vendors in that field.

Over the years I have talked with numerous users of Bill Pentz's cyclone design, either home-made or bought from ClearVue, and they have universally been happy.

I have talked with numerous Oneida customers over the past few years, many of whom have given good reviews as users of 2 and 3 hp Oneidas, as well as 5 hp but don't expect the tiny Oneida systems with small hoses to compete with a "real" system. I have recently talked to a couple users with large shops and smaller Oneida cyclones who had less than great results - so don't get a unit that is too small for your shop, from Oneida or from anyone else.

Although I still believe Oneida can be an excellent vendor if you get a big enough system, I recently chose a ClearVue for my own shop. Effective dust and chip collection depends on a very large airflow. That requires large pipes I had a huge improvement in my dust collection when I went from 4 inch to 6 inch ducts. You may be shocked to spend as much on ductwork as as on the cyclone.

That large airflow requires a large fan impeller , driven by a powerful motor. The squirrel cage fans often recovered from old furnaces probably won't be adequate - I don't think they will maintain the necessary speed and volume to carry relatively heavy chips through pipes. Your dust collector motor may be the hardest working motor in the shop - hp or more, running under full load moving lots of air for hours at a time, not just intermittent brief periods of heavy load while a tool is cutting.

Be careful And a 5 hp cyclone creates a lot of heat - not only from the motor and noise, but also from stirring a large volume of air through ducts, fans, and filters. These are basically a low efficiency cyclone that is put "in line" prior to the primary single stage or cyclone dust collector. Any separator like this constricts the airflow, dropping the pressure, which reduces the air volume, so experts normally say they should NOT be used.

The inefficiency of a simple trash can separator helps here - the large chips are dropped, and the fine duet goes on to the main unit. As a result, people are often willing to take the chips for garden mulch or animal bedding. The really ugly dust Dust Collection Funnel Online at the dust collector has to be disposed of far less often. When I had a single stage collector, I made a real effort not to open the plastic bag any more than necessary to get it out - it is really ugly fine dangerous dust. I probably got over 20 bags of chips for each bag of dust.

Now that I have the more powerful cyclone, it pulls medium size chips to the cyclone, and only drops the largest at the separator, so I only get about 5 bags of chips for each bag at the dust collector. I am experimenting with opening additional gates to reduce the suction at the separator, so more chips stay at the separator rather than going on to the cyclone.

Also, with a single stage, there is positive pressure on the collection bag it inflates. With the cyclone there is negative pressure on the collector in suction so I cannot collect directly into a bag without taking exceptional steps - I have to empty the collection can. A fellow named J. Phil Thien tried the usual Rockler, Woodcraft, and Lee Valley trash can lids as separators, and didn't like the results - too many chips got through, and chips that had already been dropped were sometimes picked up and carried out of the separator called scrubbing.

He also has a small shop and uses a shop vacuum for dust collection. But his design of the Thien Separator appears very effective. In a few minutes I can make as much dust as he used in his demonstration of a "week's worth" of dust and chips, so I don't expect to go back to a shop vacuum driven dust collector.

His design has been extended to versions that work with or inside conventional dust collectors. He also supports a forum to discuss his design - accessed from the link above. More on chips: Walnut wood chips contain a chemical that prevents seeds from germinating and can reportedly kill horses when mixed with horse urine don't use it for horse bedding. Not good for mulch? On the contrary.

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