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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Using Air Bags to lift ramps
I have never used air bags before (the lifting type), but I think my
latest project would benefit from them. I have a "chassis dyno" in the shop, and it uses two ramps that you drive the car up, then once the drive wheels are on the dyno rollers, I lift the ramps up with floor jacks to be level, and place stands under the ramps. Once the car is in place, only the non-drive wheels are on the ramp, so the lifting load is easily manageble with a floor jack on each ramp, lifting them each evenly. I would estimate the max load the air bags would EVER see to be 2500 lbs. The problem with using the floor jacks is... quite simply it is clumbsy, and can be slow. Here are my obsticles. The ground clearance is about 4" where the lifting must occur, and the distance it must lift is about 14" total, or 10 inches from the lift point. As far as I know, this would eliminate any hydraulic bottle type jack because of the stroke required. I googled "lifting air bags" and have contacted a couple of companys for some initial pricing info, but I suspect it will be expensive. I can live with the jacks if it is priced out of my league, but I need to investigate this fully before I abandon it. So, does anyone out there have some positive advise, of HELPFUL pointers of things I might be overlooking? Maybe some resonably priced vendors, or applications that may work also? Thanks for the interest! |
#2
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Using Air Bags to lift ramps
On Jul 27, 12:30 pm, wrote:
I have never used air bags before (the lifting type), but I think my latest project would benefit from them. I have a "chassis dyno" in the shop, and it uses two ramps that you drive the car up, then once the drive wheels are on the dyno rollers, I lift the ramps up with floor jacks to be level, and place stands under the ramps. Once the car is in place, only the non-drive wheels are on the ramp, so the lifting load is easily manageble with a floor jack on each ramp, lifting them each evenly. I would estimate the max load the air bags would EVER see to be 2500 lbs. The problem with using the floor jacks is... quite simply it is clumbsy, and can be slow. Here are my obsticles. The ground clearance is about 4" where the lifting must occur, and the distance it must lift is about 14" total, or 10 inches from the lift point. As far as I know, this would eliminate any hydraulic bottle type jack because of the stroke required. I googled "lifting air bags" and have contacted a couple of companys for some initial pricing info, but I suspect it will be expensive. I can live with the jacks if it is priced out of my league, but I need to investigate this fully before I abandon it. So, does anyone out there have some positive advise, of HELPFUL pointers of things I might be overlooking? Maybe some resonably priced vendors, or applications that may work also? Thanks for the interest! Sounds like you need a custom assembly that would be just like a floor jack, except maybe the bottle could be vertical. The jack bottle could go near the high end of the ramp, and a linkage could extend out to the 4-inch clearance part of the ramp. Single controller/pump, some hydraulic line, and you'll have a very slick professional-looking setup. Dave |
#3
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Using Air Bags to lift ramps
wrote in message oups.com... The ground clearance is about 4" where the lifting must occur, and the distance it must lift is about 14" total, or 10 inches from the lift point. So, does anyone out there have some positive advise, of HELPFUL pointers of things I might be overlooking? Maybe some resonably priced vendors, or applications that may work also? Could you adapt a pair of scissor jacks? The type that are OEM on GM pickups come to mind. Maybe tie a pair together with a common shaft and motor drive it? |
#4
Posted to rec.crafts.metalworking
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Using Air Bags to lift ramps
wrote in message oups.com... I have never used air bags before (the lifting type), but I think my latest project would benefit from them. I have a "chassis dyno" in the shop, and it uses two ramps that you drive the car up, then once the drive wheels are on the dyno rollers, I lift the ramps up with floor jacks to be level, and place stands under the ramps. Once the car is in place, only the non-drive wheels are on the ramp, so the lifting load is easily manageble with a floor jack on each ramp, lifting them each evenly. I would estimate the max load the air bags would EVER see to be 2500 lbs. Hunter front-end alignment racks have used air bags for years. Go to a chassis/tire shop and look one over. -Carl -- The future isn't what it used to be. |
#5
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Using Air Bags to lift ramps
Another thing you might look into is hooking in a hydraulic cylinder on each
ramp to lift them at the same time. They make manual hand pumps if you don't want to use an electrical one. I believe that the mobile dynos (i.e. Mustang?) use this kind of system, but with a rather extensive system to life more than the ramps. wrote in message oups.com... I have never used air bags before (the lifting type), but I think my latest project would benefit from them. I have a "chassis dyno" in the shop, and it uses two ramps that you drive the car up, then once the drive wheels are on the dyno rollers, I lift the ramps up with floor jacks to be level, and place stands under the ramps. Once the car is in place, only the non-drive wheels are on the ramp, so the lifting load is easily manageble with a floor jack on each ramp, lifting them each evenly. I would estimate the max load the air bags would EVER see to be 2500 lbs. The problem with using the floor jacks is... quite simply it is clumbsy, and can be slow. Here are my obsticles. The ground clearance is about 4" where the lifting must occur, and the distance it must lift is about 14" total, or 10 inches from the lift point. As far as I know, this would eliminate any hydraulic bottle type jack because of the stroke required. I googled "lifting air bags" and have contacted a couple of companys for some initial pricing info, but I suspect it will be expensive. I can live with the jacks if it is priced out of my league, but I need to investigate this fully before I abandon it. So, does anyone out there have some positive advise, of HELPFUL pointers of things I might be overlooking? Maybe some resonably priced vendors, or applications that may work also? Thanks for the interest! |
#6
Posted to rec.crafts.metalworking
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Using Air Bags to lift ramps
wrote in message oups.com... I have never used air bags before (the lifting type), but I think my latest project would benefit from them. I have a "chassis dyno" in the shop, and it uses two ramps that you drive the car up, then once the drive wheels are on the dyno rollers, I lift the ramps up with floor jacks to be level, and place stands under the ramps. Once the car is in place, only the non-drive wheels are on the ramp, so the lifting load is easily manageble with a floor jack on each ramp, lifting them each evenly. I would estimate the max load the air bags would EVER see to be 2500 lbs. The problem with using the floor jacks is... quite simply it is clumbsy, and can be slow. Here are my obsticles. The ground clearance is about 4" where the lifting must occur, and the distance it must lift is about 14" total, or 10 inches from the lift point. As far as I know, this would eliminate any hydraulic bottle type jack because of the stroke required. I googled "lifting air bags" and have contacted a couple of companys for some initial pricing info, but I suspect it will be expensive. I can live with the jacks if it is priced out of my league, but I need to investigate this fully before I abandon it. So, does anyone out there have some positive advise, of HELPFUL pointers of things I might be overlooking? Maybe some resonably priced vendors, or applications that may work also? Thanks for the interest! Perhaps some type of linkage that would allow you to use a hydraulic or pneumatic cylinder laid horizontally or at an angle. Shawn |
#7
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Using Air Bags to lift ramps
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#8
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Using Air Bags to lift ramps
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#9
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Using Air Bags to lift ramps
On Fri, 27 Jul 2007 09:30:40 -0700, wrote:
I have never used air bags before (the lifting type), but I think my latest project would benefit from them. http://www.firestoneindustrial.com/n...ctuators.shtml -- Ned Simmons |
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