24.05.2020  Author: admin   Easy Woodworking Projects
Wood dust may seem like one of the more benign dusts, due to its source material, but exposure to it has been linked with serious health problems. Woodworking equipment tends to throw this dust around a facility, as anyone in these industries knows, so addressing the dust is often a challenge. However, the evidence is in that a worker's exposure to wood dust needs to be limited. Fortunately, methods exist to remediate this dust, protecting both workers and property. Additional Information. Abrasive Blasting Dust Collection. Aluminum Dust Collection. Blast Room Dust. Carbon Black Dust Coll. • Making An Automatic Dust Collection System; Shopmade #  DIY Wood Guy. • тыс. просмотров 2 года назад. Циркулярный стол своими руками из паркетки и фанеры (полная хронология). Wood Dusts - Wood dust particles are particularly bad news. Electron microscope images show fine wood dust particles are covered with razor sharp edges and extended sharp often barbed points which more seriously damage and scar our tissues and cause these particles to get lodged trapped deep in our tissues where it is very difficult for our bodies to get rid of them.  Wood Dust Risks - Most large woodworking facilities vent their dust collection systems outside, so fine dust exposure is limited to the dust being made.  These airflow requirements were set by those firms who guarantee customer air quality after decades of air engineering and experience with how much air we need to move at our larger stationary tools for good fine dust collection.

A good system, however, will keep the broom and your lungs from wearing out prematurely. There are two main points to consider when choosing a dust collector. First, figure out the air-volume requirements of the machines in your shop see the chart on p. Next, decide on what kind of hookups you are reqhirements to use: flexible hose, PVC pipe or metal duct.

I used the collectors with my tools, which include requiremengs in. The wood dust collection requirements 3d rating is a fairly wopd guide to the performance of a dust collector see the chart on p. Hookups, however, are everything. Too much flexible hose will rob even a big collector of power. Metal duct, not unexpectedly, performs best. Even an 8-year-old, 1-hp col-lector can collect chips from machines 25 ft.

Every shop is different, of course, and your results may vary, so use reqquirements findings as guidelines, not absolutes. A 1-hp single-stage collector can handle any machine in my shop The biggest sawdust wood dust collection requirements 3d in my shop is a in. And even a 1-hp singlestage dust collector wood dust collection requirements 3d handle that machine, hooked up with about 6 ft.

I borrowed a new UFO, same as my old collector, to see if anything had been changed. Some woodworkers buy two units and station them strategically in their shop. At 82 decibels measured at 8 ft. The most economical and biggest-selling dust collectors are the two-bag, single-stage models.

Single stage fust the dust is sucked through the impeller fan and dumped into the lower bag. Wood dust collection requirements 3d upper bag collects fine sawdust and lets the exhaust air back into the shop. Two-stage collectors are the next step up. The motor and impeller sit atop a barrel. Chips enter the barrel and are directed downward, although tequirements swirling air inside may occasionally move smaller chips upward.

A filter bag hangs off to dsut side and collects the finest dust. Two-stage cyclones are at the top of the evolutionary chain. The motor and impeller sit atop a cone-shaped canister, the cyclone, which is connected to a trash can below.

Chips or other large debris enter the cyclone and swirl downward, avoiding the impeller. The longer wood dust collection requirements 3d cyclonic chamber, the greater its effectiveness at slowing down and separating large particles. Air is filtered either by a pleated internal cartridge or by one or more felt bags hanging off to the side of the machine. Internal-cartridge collecton use the least amount of floor space. The upper bags or cartridge filters of all collectors must be shaken out occasionally to remove fine dust.

Debris entering a single-stage collector passes through the impeller, many of which are made of steel. Even a small bit of metal, such as a screw, can cause collction spark when it hits a steel impeller. Dust-collector explosions are rare, but the potential is there.

Debris, metal or otherwise, not only makes a racket when it hits an impeller but also imparts stress on the bearing and will shorten its life.

One way to reduce the risk of fire is to choose a single-stage collector with a plastic or aluminum impeller. Steel impellers are fine, however, if you avoid using wood dust collection requirements 3d dust wood dust collection requirements 3d to sweep up miscellaneous debris off the floor or workbench.

I also used the 1-hp collector with a PVC duct system 4-in. At that distance, because of increased resistance, wokd air volume drops to under cfm, less than recommended for woodworking tools. In reality, however, one can live with that. When I hooked up the 1-hp collector to a newly installed metal duct system, with my tools in the same configuration as before, I woo really requkrements. The air volume was back up to cfm, very acceptable.

Then I hooked up my old 1-hp collector, which is outfitted with oversized felt bags available from Oneida Air Systems that improve airflow and capture fine dustand I measured almost cfm. Hooked up to a 6-ft. Cyclones and two-stage collectors have slightly more internal air resistance; hence the lower cfm reading.

Performance ranged from good to so-so, depending on how much sawdust was being spit out by my tools. The best way to direct maximum airflow to the tool being used is to attach a blast gate to each hose. Hooked up to a PVC duct system a run of about 25 ft. A colleection unit such as wood dust collection requirements 3d Oneida costs almost twice as much. Penn State Industries also sells a cyclone collector. With two blast gates open, the air volume dropped and was insufficient to operate two big machines at once.

More horsepower does mean more noise; both registered 85 decibels at 8 ft. The Delta comes wired for volts but can be switched over to volts. The Oneida wood dust collection requirements 3d without cable wpod switch. It can be wired to run on either current. A 2-hp unit can sometimes handle two machines at once Hooked up to two requorements. When I connected the 2-hp wood dust collection requirements 3d to the PVC duct system, they too were robbed of considerable power, but one machine could be operated at a time with satisfactory results.

When connected to a wood dust collection requirements 3d duct system, the Jet collector really moved a lot of air, cfm at the tablesaw-jointer connection after about 25 ft. With two blast gates open, the air volume was reduced to less than cfm, still acceptable for some operations. The Dust Boy produced slightly lower readings but still had more than enough power to run collecfion tool at a time in any configuration.

If you regularly requuirements more than one machine simultaneously, it would be wise to look at 3-hp or bigger dust collectors. They cost more, however. Most 2-hp collectors come wired for volts. The Dust Boy can be run at either volts or volts. On the matter of choosing a dust collector, a two-stage cyclone gets my top vote.

A small cyclone collector takes up dusy room, is easy to empty and runs very clean. For example, on all of the single-stage units, even after running them for only an hour, fine dust appeared on the machine and in the area around it.

The Oneida cyclone, outfitted with an internal requirementz, rubber gaskets and wide metal ring clamps, dut better. Two-stage units such as the Dust Boy Delta also makes a two-stage collector are also nice and compact. The Dust Boy takes up 6 sq. The Dust Boy as does the Oneida collextion with a Leeson motor reequirements cast-aluminum housing and impeller fanand the sturdy colleection barrel holds coolection lot of debris, 55 gal.

Before it can be emptied, however, the heavy motor and housing must be lifted off. Removing the lower bag of a single-stage collector is an easy matter of loosening a band clamp. The real fun begins when you try to reattach it. The lower bag must be wrapped around the metal waist of the machine and held in place before the clamp can be cinched. Some manufacturers, such as Jet, add an elastic band inside the lower bag to facilitate reattachment somewhat.

The skirt and a standard gal. I just wish rwquirements skirt were made of felt rather than the more porous woven fabric. This setup will reduce the air volume. Wwood an ad says wood dust collection requirements 3d collector is rated at 1, cfm, what does it mean? Not much, really. Cfm stands for cubic feet per minute, a measure of the volume of air moving past a point of reference.

The cfm figure needs to be put in the context of the collectiion of resistance, or friction, present called static pressure, or Wood dust collection requirements 3d. Air moving through duct or hose encounters resistance, just as a person would slipping down a water slide.

The more bends and bumps, the slower the ride or the lower the air velocity and volume. Many manufacturers rate their machines without bags or duct attached. While trying out a number of dust collectors, I measured their performances under real working conditions, using flexible hose, PVC pipe or metal duct in my requiremrnts.

I also measured collectors hooked up to a straight piece of 6-in. Collectors ranging in size from 1 hp to 2 hp have impellers fans sized from 10 in. All things being equal motor speed and impeller designa bigger impeller coupled with dut bigger motor will move more air than a smaller pairing.

There are some differences among collectors; to learn more, ask a manufacturer for an impeller performance chart. As soon as any collector is hooked up in ccollection shop, performance declines in wood dust collection requirements 3d to the length and type of hookup. Materials that affect airflow. The metal elbow topwhich is designed for central dust-collection systems, has a gentle sweep, which lowers resistance to airflow. Plastic PVC pipe has a tighter-radius bend and restricts airflow more.

Ribbed flexible pipe also disturbs airflow, up to three times as much as metal. Hooked up wood dust collection requirements 3d two 6-ft. With a larger upper collecion, I found that the cfm readings were not compromised. But if you happen to vacuum up any offcuts, they will make quite a racket rattling around in a metal trash can.

Although many woodworkers, myself included, have used PVC drainpipe for duct without mishap, experts warn against using the material.

Feb 10,  · A Revolution in Dust Collection The trouble with wood dust is that the most dangerous particles—the very fine ones—are the most difficult to collect. Under 10 microns in size, they hang longest in the air, penetrate deepest into the lungs, and are the hardest for the body to eject. Aug 15,  · Even the best dust-collection system won’t eliminate the need for occasional sweeping. A good system, however, will keep the broom and your lungs from wearing out prematurely. There are two main points to consider when choosing a dust collector. First, figure out the air-volume requirements of Fine Woodworking Dust Collection Year the machines in your shop (see the chart on p. 84). Nov 03,  · The speed of air movement through a dust-collection system is critical. For systems carrying woodshop dust and chips, engineers recommend minimum air velocity of 4, FPM in branch lines (that’s about a 45 mph breeze) and 3, FPM in the main duct. The speed of the air moving in the system may exceed these figures, but shouldn’t fall below them.

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