Most commercial shops must change out their fine filters roughly every three months of full time woodworking. In a cyclone this 5 hp motor actually was left with over 1 hp of unused capacity, so I engineered a 16" impeller. Unless you really know what you are doing, making your own impeller or grabbing just any old impeller can be potentially life threatening. Almost all small shop vendors error by supplying their larger cyclones with only 14" diameter impellers and only 2 or 3 hp motors. I decided to see if I could come up with a better way of holding the impeller on the shaft, without going through too much hassle or expense. At first I was not sure on my wiring, so started with the impeller turning the wrong way. I strongly recommend use of steel backward curved material handling impellers. Before you use these plans you should check that your printer prints to "size" and square. With Microsoft IE click to open the drawing then move your mouse to the lower right corner. These impellers are designed for mounting on horizontal motor shafts. For those who don't recognize what a thermite reaction is, you already know because Fourth of July sparklers are made from powdered aluminum that when lit burn with a very bright, hot, high intensity flame. I again subsidized the costs for test gear, testing, blower housing, and provided the engineering specifications. That table also shows it will move this much air through a 6" blower opening which matches our main duct. blower has been just too handy for stuff like my Take a few minutes, study your impeller and figure out which way it should rotate. Although 300 square feet will work, I recommend using 600 square feet because the engineering notes from all the major suppliers recommend we double the filter area because that will greatly reduce filter resistance, cut the cleaning frequency by more than half, and will more than double overall filter life. If smaller than 3 hp then I recommend selling your existing dust collector and using the money to help pay for a good motor and impeller then making my budget blower. I block the air inlet. I reassembled the fan, connected the hoses, and turned it on. don't "throw" the air at the tips. speed table. pitot tube pressure to air | With the inlet unobstructed (no filter or separator), the motor 1/4 nylock nuts for motor plate bolts, 4 ea. It made quite a howl while doing this, and that later This means we can size our blower and motor using any good fan table. the bag. new one easy enough. Most only have one or two tiny set screws holding the impeller in place, so many have reported that their impellers slid down and did bad things to their blower housings. Sadly, all of those kinds of posts rapidly vanished from the major Internet woodworking forums whose livelihood depends upon vendor advertizing. I deliberately made the impeller with longer blades, silent dust collector. Pictured is used like the one shown. Or look for a heating and cooling repair company. already. The upside is that the parts I tried worked well. One of the main reasons I recommend our impellers besides their being professionally balanced, is they use a compression hub to hold them tightly on the motor shaft. too constrictive to use with this type of low pressure high volume Once a layer of Some of I used a bit of calculus to work out the theoretical pressure Website The new owners stopped honoring our agreement and stopped carefully packing the impellers they shipped so most arrived damaged and people complained to me. Used Blowers- (both motors are capacitor run motors), so by those indications, the motor These low service factor motors are often used for fixed purposes such as opening a gate and have heat sensors that limit how much they can run. Perhitungan saya hanya menyesuaikan dengan ukuran gentong yang saya pakai. pieces together hard enough to prevent the temporary enclosure pieces Then carefully spin that shaft with a hand drill to quickly take down the aluminum impeller alloy to have nice flat faces both top and bottom. It was lower (better), and the running capacitor was also a larger capacity I can certainly sleep much better, confident that the impeller will not slip off the motor shaft. Your email address will not be published. Motor yang saya gunakan adalah motor bekas mesin cuci. This unit has just a 1/3 HP motor, yet it Bragging like crazy because tested it out and got a real 1498 CFM, 7600 FPM, 3.8" static pressure, and all at 12.9 amps. The other possible problem was my impeller design. This heavier junk we can suck up can severely damage any lightweight impeller and even cause them to explode. The Donaldson-Torit filter engineering specifications say the minimum filter size for woodworking dust collection is one square foot of blended filter area for every four cubic feet per minute of airflow. Because blower technology is mature most blowers of the same type and motor speed have near identical performance. I think the idea is as the air moves radially outward, the backward curved blades http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575168271&toolid=10001&campid=5337860386&customid=Electric+Motor&icep_item=400342556275&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg. Next again use the circle-cutting jig to route a bottom blower piece hole to match the outlet from the cyclone. It's normal for radial blowers to need less torque when airflow Drill two 1/8X1/8 pop rivets to connect spiral metal pieces. Square, drill and then tap both ends. That seal is critical in terms of controlling the really fine dust. Imeasuredthe air speed at the output using a pitot The smaller the filter area the faster the dust builds, the more the airflow gets killed, and more often we must clean our filters. Marbles are nominally around 5/8, but from I shortened the blades, made a circular housing for the impeller, With no impeller attached fire up the motor. Air engineers did years of testing to determine how big of a "bubble" it takes to pull in the fine dust. The all polyester filters are much thicker so require half as much filter surface area as the blended filters. choke the exhaust down with a dust bag. Did you make this project? Does the groove for the metal motor mounting plate go on top or the bottom of the upper piece of plywood? If you do so, then you need to also inset your fender washers so they hold the blower on tight. put the O-ring over the bag end on the adapter. This is great. All rights reserved. At 4" static pressure the airflow climbs to 1893 CFM while the horsepower climbs to 3.68 hp which is well over 3 hp motor ratings even with large 1.1 (110%) service factors. This sizes our ideal impeller at 15.5" based on that blower table. I found using a 16" diameter impeller makes a big difference in my shop, as I have a number of tools that just could not be modified to accept bigger ports. These impellers cannot be used directly as delivered because they need a different way to mount to the motor shafts (see impeller mounting below). We have to calculate our highest resistance ducting run then add the resistance of our filter, which changes over time. This is the impeller that is now used in the Clear Vue Max cyclones. So it looks like the system of air resistance and and neglected to take more pictures. pass a little dust at first but it will quickly seal those tiny air leaks in Dicks Sporting Goods (36" Cotton In precise engineering terms, the blower blows like crazy! the house died, the blower lives on. The bottom line is Jet requires a full 3 hp motor to power this impeller with a dust collector which does not move as much air. When we have a vertical shaft, then the weight of the impeller is constantly trying to slide the impeller off the motor shaft. That will save your back, makes inspection and service much easier. on the optimistic side. for dust collectors. You can contact him at RMcbra@aol.com to see if he can make one for you, but you need to work out your arrangements with him. Using the grate I took out of the floor drain, I lined it up to the intake side of the blower and marked the 3 mounting holes. It is a good idea to use a 3/8" round over on the inside edge of this inlet hole to smooth the airflow coming into the blower; With the blower top and bottom stuck together with double-sided tape drilled all the matching hardware holes at once so the holes all align just right. The consensus was both of these firms are really only setup to service large commercial accounts that regularly order large numbers of filters. Remember that these firms I have helping do small shop owners a favor. We need a nice smooth curve that gets keeps right distance from the impeller. Fasten the adapter to the blower case I balanced the impeller by cutting away at the edges a bit, sanding a bit, With our motors all turning at the same 3450 RPM for U.S. 60 cycle current, every one of those blowers moved exactly the same amount of air. Wikipedia, and made a pressure to air speed conversion table: Duct tape the outside flange on the blower fit perfect in the drain. Can I use this same good quality motor that has exactly the same mounting face as the Leeson you recommend to power a 14" jet impeller? My early designs that used the Cincinnati Fan and Jet impellers held on to the motor shaft with setscrews tend to be a problem. I recommend using this impeller with a left handed version of my cyclone design for both optimum airflow and separation efficiency. Between the potential for material hits, need to move a high volume of air, need for self-cleaning, and need to provide higher pressure, most available fans, aluminum impellers, plastic impellers, squirrel cage impellers, vacuum impellers, and airfoil impellers will not work to safely power a dust collector or cyclone. The more air we move the harder the motor must work meaning more current, amperage and hp required. This is one of those that got me into trouble before. This same vendor also states on their web pages that steel impellers are a major fire risk and do not comply with the National Fire Protection Association (NFPA) guidelines. We actually had one small shop vendor who supplied exactly the same sized impeller with their 1.5 hp, 2 hp, and 3 hp dust collectors and cyclones. inlet board in your lap as you carve. I would rather not discuss After looking all over others found Cincinnati Fans sells a very heavy aluminum material handling impeller and a lighter air movement impeller. I removed all the screws from the blower to sperate the housing. Slide the blower / dust bag portion of the unit under a bench and inlet is Unfortunately a full dustbin, a plug in the cyclone cone, clumps of debris, a large surge of dust, or an air leak turns our cyclones into little more than a pipe that passes all right through the blower. Used my band saw with the pieces still together rough cut the blower top and bottom pieces, followed by a sander for exact shaping. Unfortunately, Harbor Freight quit selling these, so you are going to have to look elsewhere. We can use the same blower table and see that a 14" diameter impeller is so challenged by resistance that it does not even perform once over 11" of resistance. Anyhow, these move the same air as the 16" diameter impellers which is as much air as you can move without putting your 5 hp motor at risk. well. At this point, my blower was working adequately, so after that, With these corner registration marks you can print a full sized layout including the spiral that many find difficult to draw. to that other 1/3 HP motor/blower unit. The outlet width needs to be equal or bigger than whatever limits the blower input and must also be big enough to provide the clearance we need on our spiral. To those set screws I added a collar mounted on the motor shaft and a beefy fender washer that clamps the impeller against the collar. A motor with a 0.5 service factor should never be run more than half time or it will overheat and can burn up. Can I use the same 14" impeller that others use and get ample performance? The result is you get some additional pressure and a little more volume but not a huge amount. Build your own Bahannya dari besi dan impeller-nya dibaut ke adaptor. Bill, please help. With too many unable to build their own arbors, I had a machine shop make up arbors and sold them at cost. draws 415 watts. An undersized impeller just spins leaving a good portion of your motor's horsepower unused. Most likely you need to make a blower housing because yours will either be too small or make terrible noises with the larger impeller. It typically takes nine to twelve deep cleaning cycles meaning as much as a couple of years before small shop woodworkers fully season our filters.