For the most part these are a poor choice just as they are for ducting. Carefully in order add the lines that go to that corner joining the first two to make a triangle. The first was Jim Halbert in 1995 and shares on a YouTube video at (click here). Typical small shop dust collector and cyclone blowers only generate about half of their maximum possible pressure when working, so run in the 4" to 6" of pressure range when working. This page assumes you have already decided to move forward to good collection. All was over triple what I paid for good quality smooth walled 4" flex hose, but that was not big enough for some of my needs. (Radius will give you sixths, splitting any angle will give you 12ths, then one more split for twenty-fourths.). I drilled a hole near each pipe end through both layers of foil, inserted a 1/4-20 screw from the inside of the pipe, put on a nut to make a good circuit, then connected each section using 14 gauge wire. Making your ducting from Melamine creates rectangular ducting. If you purchase the ductwork the drawings are free. In simple words this means normal room air currents are moving faster than our sucked air so the fine dust gets blown all over. Additionally spiral pipe ducting is a pain in the tail to change. Our smaller blowers also require us to use properly sized duct with long sweeping big radius curves or 90-degree joints broken up with a straight run between two 45-degree joints. That combination creates piles of dust in the ducting just waiting for a spark for the duct airflow to quickly blow into a fire that the PVC will make worse. Using MDF instead of my original plywood top on my cyclone and blower helped some. My engineer friends at Dwyer Instruments that build most of the air measurement meters say roughly 10 diameters of pipe will both stabilize the airflow and set that airflow to about the same duct speed as your main. I need your help with transitions. Even with rebar sides, my straight walled trench cracked. 
"With regards to cyclone noise, I work in automotive and one product which probably be good for reducing cyclone noise is what we call peel and stick mastic. Ducting size is very important as too small limits the total air volume and too large lets the airspeed drop so low that the dust builds into large ducting piles. Please take the time to protect yourself and those close to you. Plus, with my now in retirement and thinking about a downsized new home with a separate shop, this system would allow for easy disassembly and reassembly. I'm just in the preliminary stages of planning a cyclone dust collector based on your airfoil blower. You are not alone in this sticker shock. Remember that just one obstruction, our water valve will totally control water flow. All it takes is a heavy box to slide into or get stacked on top of our ducting and fittings to ruin them. The top magazine rated cyclone vendor designed and supplied the ducting for their cyclone I installed in my shop. The sides I leave straight and use aluminum tape to hold to the metal sides of the blower. Many publish their information on the Internet such as Cincinnati Fan Engineering Data. If done right that wire also attaches to the metal coil spring inside your flex hose then you ground that wire both at your machine and your blower. Here are pictures of ties and matching mounts that you can order from Amazon. We spent quite a bit of my company's money to try and solve the problem with consultants and experts all to no avail. Many of us end up with confusion and problems in trying to hook up our dust collection systems. Some tools have internal ducting that requires use of two 4" ports. Because improperly designed ducting can cause fires, fail to meet local codes, etc., these drawings, plans, procedures and words are for information only. I don't want to waste my electricity or limited capacity blower on leaks. If you do change size ducting, use a big enough blower to support opening multiple blast gates and appropriate connections for enlarging and reducing: My friend Sugi found a better way to do ducting reduction and expansion. Using PVC pipe instead of dust collector spiral pipe or thick HVAC pipe helps considerably as you don't hear nearly as much sawdust rattling in the pipes. Each of us can go through this process to determine our needs, pick a blower large and strong enough, configure our ducting, separate off the heavier dust, and either exhaust the fine stuff outside or appropriately filter that dust. My expensive new commercial blast gates won't fit my PVC duct. My own galvanized steel cyclone measured 92 dB. Also, after making sure all fits and before my final assembly into the PVC, I pull out my flux and solder the HVAC transition up so there are no air leaks. This will keep up the main airflow ample to ensure no plugging but you kill the total airflow needed for fine dust collection and often don't end up even with good "chip collection". Is there any problem with static buildup, as there is in PVC? The low cost sewer and Drain (S&D)PVC (plastic) pipe worked so well I used to recommend the PVC ASTM 2729 "Sewer and Drain (S&D)" pipe for most small shop woodworkers. Even reducing ducting size right at the machine for the shortest possible distance to a small 4" port will still kill system performance. So, unless we use tools that totally enclose the dust making activities, when woodworking we need to worry about fine dust. What are your thoughts on doing this and can you share any hints? This will get the tape stuck. In some cases we cannot amply fix our tools, so we must use them with a powerful downdraft table. If you are still concerned, go read his information. Even with a good cyclone and vacuum, I found some tools still spray dust. A bell shaped (hyperbolic) curve eliminates most of the problems from the air coming from the sides and back to reduce resistance and increase flow. These experts share how to avoid these piles. Just about all HVAC supply stores and ducting supply firms offer one or more of these types of systems. The more fold lines, the smoother your circle. And, it does help to dampen the noise considerably. Most of these are held together with either rivets or metal stamps that kind of push a little circle through adjacent pieces then mushroom the top a little. Even with venting outside, the peer reviewed medical research shows the more fine dust we take in the greater the short- and long-term health damage and this research also shows even with their much lower exposures almost all large facility woodworkers develop serious dust triggered health problems and significant loss of respiratory capacity. The only way to capture the fine dust as it is made is to start with hoods that block the fast moving air streams. ✓ If your dust collector moves air quickly enough, use pipes with larger diameters to allow more air movement and less static pressure. I used a second compass that is set to the length of an arc that is 1/24th of a circle. Adding more suction to these units causes the sanding pad to be pulled to the work surface making the tool difficult to use and potentially damaging the piece being sanded. I like a wooden sub floor in a shop because it is much easier on the legs.
Dust collection when improperly built, implemented, used, or maintained may cause serious injury or even death, so USE THIS INFORMATION AT YOUR OWN RISK! Unless you as a woodworker provide appropriate fine dust protections, most small shop owners put your health, the health of those close to you, and even the health of your pets at risk. |
It can work too well and tighten the ties so much it is near impossible to remove the spacers, so just tighten to snug, not tight. Where did you get good 4, 5, and 6" flex hose? Now take a tight ball of rags and push it through the pipe from that well secured end. As with wyes, there are many different types and the best are going to be those that are smooth and have the longest radius.
Economical Hangers are fabricated of 20 gauge galvanized steel, which is stronger than most competitors. It almost made it, but his metal calipers got turned sideways at the second bend and jammed in so hard it locked in place. My PVC is about 6 1/4" in outside diameter. We thank you for your support and your business and we hope that this will all be over soon. It is real simple. I made your cyclone and low cost blower for $167 from your Build Budget Blower web page using a 14" Jet impeller and HF 5 hp motor. When I bought a set of air gauges and did some testing, I realized that my trashcan separator was not good news at all. (my thanks to Dave for reminding me that under typical dust collector pressures air is virtually incompressible). He is right, but it takes a fairly long length to be as efficient. Had I used that raised computer room flooring my trench would have been big enough to also include lines for my shop vacuum, drainage, and possibly water if permitted by my building codes. You cannot because our lungs cannot create the pressure needed to overcome the high resistance of that small pipe. Having the tape back to back made grounding easy. With a basement shop, make sure your blower is not attached to a ceiling or wall and that you go from the blower to the melamine with flex hose to dampen blower noise. I found the best prices at Wynn Environmental (thanks Jack Diemer) and next best from Amazon. For instance, our 4" duct moving 350 CFM at 4000 FPM in a down drops suddenly cuts the airspeed in a 6" main to 1783 FPM creating instant plugging in our larger mains. These gates come with a screw that pushes down on the slide portion of the gate to lock that slide in place. As shared previously fine invisible dust is so unhealthy that the EPA sets very tough indoor air quality standards. but I still constantly struggled with the new upper filter bag getting so full of dust it felt like cement and would barely pass air. Although heating PVC gives off very dangerous fumes that you need to protect yourself against, you can do magic with a heat gun or two and PVC. Nope. With no clean out, you would not believe what we had to do to get that apron unstuck. Each successive line makes another triangle whose base equals the length of a segment that is 24th of a circle. Most cannot because it has too much resistance. Wood dust ducting can be installed on machinery and utilizes efficient levels of speed to draw air and extract contaminants from each machine before the contaminated air reaches respiratory zones. Another solution for hanging duct is to use stranded metal cable (called wire rope) with special clamps that let you adjust the length. They provide simple formulas and approaches to help design our ducting to move the needed air with ample volume and speed at each tool. Every filter cleaning left me and my shop covered in the fine dust I bought that fine bag to avoid. Benefits of Air Handling Systems Hobby Shop Ductwork include: Ductwork available in 3 7 diameter.
"With regards to cyclone noise, I work in automotive and one product which probably be good for reducing cyclone noise is what we call peel and stick mastic. Ducting size is very important as too small limits the total air volume and too large lets the airspeed drop so low that the dust builds into large ducting piles. Please take the time to protect yourself and those close to you. Plus, with my now in retirement and thinking about a downsized new home with a separate shop, this system would allow for easy disassembly and reassembly. I'm just in the preliminary stages of planning a cyclone dust collector based on your airfoil blower. You are not alone in this sticker shock. Remember that just one obstruction, our water valve will totally control water flow. All it takes is a heavy box to slide into or get stacked on top of our ducting and fittings to ruin them. The top magazine rated cyclone vendor designed and supplied the ducting for their cyclone I installed in my shop. The sides I leave straight and use aluminum tape to hold to the metal sides of the blower. Many publish their information on the Internet such as Cincinnati Fan Engineering Data. If done right that wire also attaches to the metal coil spring inside your flex hose then you ground that wire both at your machine and your blower. Here are pictures of ties and matching mounts that you can order from Amazon. We spent quite a bit of my company's money to try and solve the problem with consultants and experts all to no avail. Many of us end up with confusion and problems in trying to hook up our dust collection systems. Some tools have internal ducting that requires use of two 4" ports. Because improperly designed ducting can cause fires, fail to meet local codes, etc., these drawings, plans, procedures and words are for information only. I don't want to waste my electricity or limited capacity blower on leaks. If you do change size ducting, use a big enough blower to support opening multiple blast gates and appropriate connections for enlarging and reducing: My friend Sugi found a better way to do ducting reduction and expansion. Using PVC pipe instead of dust collector spiral pipe or thick HVAC pipe helps considerably as you don't hear nearly as much sawdust rattling in the pipes. Each of us can go through this process to determine our needs, pick a blower large and strong enough, configure our ducting, separate off the heavier dust, and either exhaust the fine stuff outside or appropriately filter that dust. My expensive new commercial blast gates won't fit my PVC duct. My own galvanized steel cyclone measured 92 dB. Also, after making sure all fits and before my final assembly into the PVC, I pull out my flux and solder the HVAC transition up so there are no air leaks. This will keep up the main airflow ample to ensure no plugging but you kill the total airflow needed for fine dust collection and often don't end up even with good "chip collection". Is there any problem with static buildup, as there is in PVC? The low cost sewer and Drain (S&D)PVC (plastic) pipe worked so well I used to recommend the PVC ASTM 2729 "Sewer and Drain (S&D)" pipe for most small shop woodworkers. Even reducing ducting size right at the machine for the shortest possible distance to a small 4" port will still kill system performance. So, unless we use tools that totally enclose the dust making activities, when woodworking we need to worry about fine dust. What are your thoughts on doing this and can you share any hints? This will get the tape stuck. In some cases we cannot amply fix our tools, so we must use them with a powerful downdraft table. If you are still concerned, go read his information. Even with a good cyclone and vacuum, I found some tools still spray dust. A bell shaped (hyperbolic) curve eliminates most of the problems from the air coming from the sides and back to reduce resistance and increase flow. These experts share how to avoid these piles. Just about all HVAC supply stores and ducting supply firms offer one or more of these types of systems. The more fold lines, the smoother your circle. And, it does help to dampen the noise considerably. Most of these are held together with either rivets or metal stamps that kind of push a little circle through adjacent pieces then mushroom the top a little. Even with venting outside, the peer reviewed medical research shows the more fine dust we take in the greater the short- and long-term health damage and this research also shows even with their much lower exposures almost all large facility woodworkers develop serious dust triggered health problems and significant loss of respiratory capacity. The only way to capture the fine dust as it is made is to start with hoods that block the fast moving air streams. ✓ If your dust collector moves air quickly enough, use pipes with larger diameters to allow more air movement and less static pressure. I used a second compass that is set to the length of an arc that is 1/24th of a circle. Adding more suction to these units causes the sanding pad to be pulled to the work surface making the tool difficult to use and potentially damaging the piece being sanded. I like a wooden sub floor in a shop because it is much easier on the legs. Dust collection when improperly built, implemented, used, or maintained may cause serious injury or even death, so USE THIS INFORMATION AT YOUR OWN RISK! Unless you as a woodworker provide appropriate fine dust protections, most small shop owners put your health, the health of those close to you, and even the health of your pets at risk. |
It can work too well and tighten the ties so much it is near impossible to remove the spacers, so just tighten to snug, not tight. Where did you get good 4, 5, and 6" flex hose? Now take a tight ball of rags and push it through the pipe from that well secured end. As with wyes, there are many different types and the best are going to be those that are smooth and have the longest radius. Economical Hangers are fabricated of 20 gauge galvanized steel, which is stronger than most competitors. It almost made it, but his metal calipers got turned sideways at the second bend and jammed in so hard it locked in place. My PVC is about 6 1/4" in outside diameter. We thank you for your support and your business and we hope that this will all be over soon. It is real simple. I made your cyclone and low cost blower for $167 from your Build Budget Blower web page using a 14" Jet impeller and HF 5 hp motor. When I bought a set of air gauges and did some testing, I realized that my trashcan separator was not good news at all. (my thanks to Dave for reminding me that under typical dust collector pressures air is virtually incompressible). He is right, but it takes a fairly long length to be as efficient. Had I used that raised computer room flooring my trench would have been big enough to also include lines for my shop vacuum, drainage, and possibly water if permitted by my building codes. You cannot because our lungs cannot create the pressure needed to overcome the high resistance of that small pipe. Having the tape back to back made grounding easy. With a basement shop, make sure your blower is not attached to a ceiling or wall and that you go from the blower to the melamine with flex hose to dampen blower noise. I found the best prices at Wynn Environmental (thanks Jack Diemer) and next best from Amazon. For instance, our 4" duct moving 350 CFM at 4000 FPM in a down drops suddenly cuts the airspeed in a 6" main to 1783 FPM creating instant plugging in our larger mains. These gates come with a screw that pushes down on the slide portion of the gate to lock that slide in place. As shared previously fine invisible dust is so unhealthy that the EPA sets very tough indoor air quality standards. but I still constantly struggled with the new upper filter bag getting so full of dust it felt like cement and would barely pass air. Although heating PVC gives off very dangerous fumes that you need to protect yourself against, you can do magic with a heat gun or two and PVC. Nope. With no clean out, you would not believe what we had to do to get that apron unstuck. Each successive line makes another triangle whose base equals the length of a segment that is 24th of a circle. Most cannot because it has too much resistance. Wood dust ducting can be installed on machinery and utilizes efficient levels of speed to draw air and extract contaminants from each machine before the contaminated air reaches respiratory zones. Another solution for hanging duct is to use stranded metal cable (called wire rope) with special clamps that let you adjust the length. They provide simple formulas and approaches to help design our ducting to move the needed air with ample volume and speed at each tool. Every filter cleaning left me and my shop covered in the fine dust I bought that fine bag to avoid. Benefits of Air Handling Systems Hobby Shop Ductwork include: Ductwork available in 3 7 diameter.