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#1
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What's it called?
I need an actuator, but one that is air powered preferably. Instead of the
shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve |
#2
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What's it called?
On Sun, 7 Apr 2013 16:37:07 -0700, "Steve B" wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Solenoid? |
#3
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What's it called?
On 4/7/2013 6:37 PM, Steve B wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Nail guns... -- |
#4
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What's it called?
On Sun, 07 Apr 2013 20:00:02 -0400, wrote:
On Sun, 7 Apr 2013 16:37:07 -0700, "Steve B" wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Solenoid? ....plunger? |
#5
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What's it called? It's called "I don't know how to craft a propersubject line"
How's that for a better subject line...
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#6
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What's it called?
On Sun, 7 Apr 2013 16:37:07 -0700, "Steve B" wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve There are pneumatic cylinders that will do that. Start here http://www.mcmaster.com/#standard-air-cylinders/=m84511 |
#7
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What's it called?
"Steve B" wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Air powered linear actuator ? You can control it with electric air valve. They go both directions. Problem is with vibration in some precision applications. Some have a brake. Much faster than most other actuaries. I helped make one used on a medical imager. http://www.ebay.com/sch/Air-Actuator...inear+actuator Greg |
#8
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What's it called?
On Sun, 07 Apr 2013 17:23:59 -0700, Oren wrote:
On Sun, 07 Apr 2013 20:00:02 -0400, wrote: On Sun, 7 Apr 2013 16:37:07 -0700, "Steve B" wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Solenoid? ...plunger? A plunger is on the end of a solenoid. The solenoid is the "motor" that activates the "plunger". |
#9
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What's it called?
Steve B wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Hi, Google pneumatic actuator. |
#10
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Quote:
Perhaps if you tell us what you're wanting it for, we can think of a better solution. Last edited by nestork : April 8th 13 at 05:13 AM |
#11
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What's it called?
wrote in message ... On Sun, 07 Apr 2013 17:23:59 -0700, Oren wrote: On Sun, 07 Apr 2013 20:00:02 -0400, wrote: On Sun, 7 Apr 2013 16:37:07 -0700, "Steve B" wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Solenoid? ...plunger? A plunger is on the end of a solenoid. The solenoid is the "motor" that activates the "plunger". Essentially, I want to press an electric button, or an air valve, and have a rod shoot out the end just once, bounce into something, then retrieve back into a housing. Steve |
#12
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What's it called?
"Ed Pawlowski" wrote There are pneumatic cylinders that will do that. Start here http://www.mcmaster.com/#standard-air-cylinders/=m84511 Looks like what I need. I want two to slam into two ends of a pecan to instantly fracture if for nut removal. Pecan halves are worth a lot more than plain nuts. I'll read up on this, and see if they will work. Thanks. Steve |
#13
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What's it called?
"Tony Hwang" wrote in message ... Steve B wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Hi, Google pneumatic actuator. Most of what I am finding is much too large for my use. I need about .75" rod maximum. Steve |
#14
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What's it called?
On 4/7/2013 6:37 PM, Steve B wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve If you want a fast acting cylinder, you'll have to get a high volume of air under high pressure into the cylinder. I have nitrogen tanks that are pressurized to something like 2,000 psi and I have use the high pressure nitrogen to do some wild things with pneumatics but if you wish to use air you may need to look into a compressor used to pressurize SCUBA tanks and perhaps you will need a high pressure tank like a SCUBA tank to use as an accumulator to give you that high pressure, high volume blast. You can rig a small pneumatic cylinder to open a ball valve and get a high flow of whatever gas you use to operate your cylinder but you better have some hard rubber stops to keep the piston from blowing out of the cylinder. ^_^ TDD |
#15
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What's it called?
On Sun, 07 Apr 2013 19:11:20 -0500, dpb wrote:
On 4/7/2013 6:37 PM, Steve B wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Nail guns... A fastly instantly air pressure actuator? |
#17
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What's it called?
On 4/8/2013 12:47 AM, Steve B wrote:
wrote in message ... On Sun, 07 Apr 2013 17:23:59 -0700, Oren wrote: On Sun, 07 Apr 2013 20:00:02 -0400, wrote: On Sun, 7 Apr 2013 16:37:07 -0700, "Steve B" wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Solenoid? ...plunger? A plunger is on the end of a solenoid. The solenoid is the "motor" that activates the "plunger". Essentially, I want to press an electric button, or an air valve, and have a rod shoot out the end just once, bounce into something, then retrieve back into a housing. Steve That's how a doorbell solenoid works |
#18
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What's it called?
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#19
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What's it called?
On 4/7/2013 11:52 PM, Steve B wrote:
"Ed Pawlowski" wrote There are pneumatic cylinders that will do that. Start here http://www.mcmaster.com/#standard-air-cylinders/=m84511 Looks like what I need. I want two to slam into two ends of a pecan to instantly fracture if for nut removal. Pecan halves are worth a lot more than plain nuts. I'll read up on this, and see if they will work. Thanks. Steve In that case it's called a pecan cracker. Bill |
#20
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What's it called?
On Apr 7, 11:47*pm, "Steve B" wrote:
wrote in message ... On Sun, 07 Apr 2013 17:23:59 -0700, Oren wrote: On Sun, 07 Apr 2013 20:00:02 -0400, wrote: On Sun, 7 Apr 2013 16:37:07 -0700, "Steve B" wrote: I need an actuator, but one that is air powered preferably. *Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. *What are those called? Solenoid? ...plunger? A plunger is on the end of a solenoid. *The solenoid is the "motor" that activates the "plunger". Essentially, I want to press an electric button, or an air valve, and have a rod shoot out the end just once, bounce into something, then retrieve back into a housing. Steve- Hide quoted text - - Show quoted text - That's what they do for doorbell chimes ding-dong!!! |
#21
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What's it called?
On Apr 7, 9:52*pm, "Steve B" wrote:
"Ed Pawlowski" wrote There are pneumatic cylinders that will do that. Start here http://www.mcmaster.com/#standard-air-cylinders/=m84511 Looks like what I need. *I want two to slam into two ends of a pecan to instantly fracture if for nut removal. *Pecan halves are worth a lot more than plain nuts. *I'll read up on this, and see if they will work. Thanks. Steve Steve- The small air cylinders that Ed suggested will probably do the job for you. I would suggest a "spring return" type; air powered to extend, air power off, spring return. You won't need muhc stroke... maybe 1/2" max? You'll probably want to limit the travel so you don't completely mash the nuts. And probably wind making some sort of nut holding fixture. You'll have to do some playing around to determine how much force you need so you can pick a cylinder bore size. Rod size will be small (like 1/2" or less) you'll need to put some sort of "tool" on end of the rod. check these out for concepts http://lawn-gardening-tools.com/Item...FQThQgod4mgARg http://lawn-gardening-tools.com/Item/Kinetic-Kracker http://www.amazon.com/Duke-Company-P.../dp/B000FNK8JK oops! forgot to hit send last night. cheers Bob |
#22
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What's it called?
On Apr 8, 3:26*am, mike wrote:
On 4/7/2013 10:59 PM, wrote: On Sun, 7 Apr 2013 16:37:07 -0700, "Steve *wrote: I need an actuator, but one that is air powered preferably. *Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. *What are those called? Steve Check these out https://www.surpluscenter.com/sort.a...r&keyword=ACSA The problem with a typical actuator is that the piston is small and the air inlet is small. *You can't get high speed actuation without high pressure. The nail gun has the accumulator built into the piston system with a huge port between the accumulator and the huge cylinder. *You can get high volume for fast actuation plus a lot of force with less air pressure. Gives you a lot finer control. If I were gonna crack a nut, I'd make a hard rubber platform slightly thinner than the nut. *Drill a hole in it to guide the nut. Then play whack-a-mole with a rubber hammer. *Crack your nutz and reduce tension at the same time. Based on these... I don't think he needs high speed http://lawn-gardening-tools.com/Item...FQThQgod4mgARg http://lawn-gardening-tools.com/Item/Kinetic-Kracker http://www.amazon.com/Duke-Company-P.../dp/B000FNK8JK cheers Bob |
#23
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What's it called?
On Apr 7, 4:37*pm, "Steve B" wrote:
I need an actuator, but one that is air powered preferably. *Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. *What are those called? Steve Souinds like you are describing an a "pneumatic cylinder" Same as a hydraulic one except run by air pressure. Harry K |
#24
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What's it called?
"Bill Gill" wrote in message ... On 4/7/2013 11:52 PM, Steve B wrote: "Ed Pawlowski" wrote There are pneumatic cylinders that will do that. Start here http://www.mcmaster.com/#standard-air-cylinders/=m84511 Looks like what I need. I want two to slam into two ends of a pecan to instantly fracture if for nut removal. Pecan halves are worth a lot more than plain nuts. I'll read up on this, and see if they will work. Thanks. Steve In that case it's called a pecan cracker. Bill And they are either slow or spendy. Most are handmade. The expensive ones are $14,000. Steve |
#25
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What's it called?
"bud--" wrote in message eb.com... On 4/7/2013 10:55 PM, Steve B wrote: "Tony wrote in message ... Steve B wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Hi, Google pneumatic actuator. Most of what I am finding is much too large for my use. I need about .75" rod maximum. Steve The cylinder attached to a .75" ram will give you enough force to pulverize your pecans - you can sell pecan-nut-and-shell dust. You want a rather small cylinder with a larger face, which you can fabricate easier than most of us. One method is to spring load the face (may be relatively large springs) and give the cylinders a short hit of air. You could put a stop on the extension of the face that would help stop from pulverizing the pecan. Would think you only need one cylinder, and an 'anvil' on the other side of the pecan. Another method, 'face piece' is relatively heavy and separate from cylinder. It is in a guide. Pneumatic cylinder kicks the 'face piece' and it travels past where the cylinder stops to hit the pecan. Smaller spring pushes 'face piece' back. This is more complicated but should be more controllable. It doesn't matter how long an air pulse to the pneumatic cylinder is. The hit to the pecan largely depends on the weight of the 'face piece'. Maybe easier, you could put a spring on the back side of the 'anvil' to control the hit. The nut will slide into a piece of pipe, and the ram will have something attached to the end of it so as to make a flat striking face. That will be over sized of the pipe, so it never enters the pipe. The cylinder will control the amount that the nut is compressed, as 1/8" on each end is adequate. Steve |
#26
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What's it called?
On 2013-04-07, Steve B wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? I think you might be thinking of an "intertia" nutcracker. I've never used one, but I understand they work pretty well on pecans. http://tinyurl.com/66zwabj Since they are powered by a rubber band, should be pretty easy/cheap to make yer own. nb |
#27
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What's it called?
On 4/7/2013 10:55 PM, Steve B wrote:
"Tony wrote in message ... Steve B wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Hi, Google pneumatic actuator. Most of what I am finding is much too large for my use. I need about .75" rod maximum. Steve The cylinder attached to a .75" ram will give you enough force to pulverize your pecans - you can sell pecan-nut-and-shell dust. You want a rather small cylinder with a larger face, which you can fabricate easier than most of us. One method is to spring load the face (may be relatively large springs) and give the cylinders a short hit of air. You could put a stop on the extension of the face that would help stop from pulverizing the pecan. Would think you only need one cylinder, and an 'anvil' on the other side of the pecan. Another method, 'face piece' is relatively heavy and separate from cylinder. It is in a guide. Pneumatic cylinder kicks the 'face piece' and it travels past where the cylinder stops to hit the pecan. Smaller spring pushes 'face piece' back. This is more complicated but should be more controllable. It doesn't matter how long an air pulse to the pneumatic cylinder is. The hit to the pecan largely depends on the weight of the 'face piece'. Maybe easier, you could put a spring on the back side of the 'anvil' to control the hit. |
#28
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What's it called?
On Mon, 08 Apr 2013 08:17:32 -0500, Bill Gill
wrote: In that case it's called a pecan cracker. Bill http://pecanvalleypecans.com/Graphics/Texas-Two-Step-Nut-Cracker.gif |
#29
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My understanding is that scuba tanks are pressurized to about 6,000 psi.
I wouldn't use 2000 psi or anything near 6000 psi air pressure on a pneumatic cylinder without confirming that the cylinder and all the hoses carrying that air are rated for that kind of pressure. If you put 2000 psi into a cylinder rated at 300 psi, you've got a pipe bomb. Since most air compressors operate at about 120 to 150 psi, I expect that'll be what most pneumatic equipment is rated for. Maybe 300 psi to provide some safety factor. But, I doubt you'll be able to find a pneumatic cylinder rated for 2000 psi. I don;t know what would happen if you put 2000 psi air into a hydraulic cylinder rated for 5000 psi oil pressure, but at least the cylinder wouldn;t turn into a pipe bomb. |
#30
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What's it called?
On 4/7/13 6:37 PM, Steve B wrote:
I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Someone else mentioned the Surplus Center in Lincoln, NE. You might look at their hydraulic stuff. Hydraulics normally operate at 2000 psi. That could give you a little more speed. Maybe a hydraulic cylinder operated on air would be useful. They also have power packs. |
#31
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What's it called?
bud-- wrote:
On 4/7/2013 10:55 PM, Steve B wrote: "Tony wrote in message ... Steve B wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Hi, Google pneumatic actuator. Most of what I am finding is much too large for my use. I need about .75" rod maximum. Steve The cylinder attached to a .75" ram will give you enough force to pulverize your pecans - you can sell pecan-nut-and-shell dust. You want a rather small cylinder with a larger face, which you can fabricate easier than most of us. One method is to spring load the face (may be relatively large springs) and give the cylinders a short hit of air. You could put a stop on the extension of the face that would help stop from pulverizing the pecan. Would think you only need one cylinder, and an 'anvil' on the other side of the pecan. Another method, 'face piece' is relatively heavy and separate from cylinder. It is in a guide. Pneumatic cylinder kicks the 'face piece' and it travels past where the cylinder stops to hit the pecan. Smaller spring pushes 'face piece' back. This is more complicated but should be more controllable. It doesn't matter how long an air pulse to the pneumatic cylinder is. The hit to the pecan largely depends on the weight of the 'face piece'. Maybe easier, you could put a spring on the back side of the 'anvil' to control the hit. That is more better. Of all the comments, I think acceleration, force, mass, destruction of mechanism. Most actuators will specify maximum pressures. The actuators really needs a soft stop, and the ram will continue on. Greg |
#32
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What's it called?
wrote in message ... On Mon, 08 Apr 2013 21:40:29 -0500, Dean Hoffman " wrote: On 4/7/13 6:37 PM, Steve B wrote: I need an actuator, but one that is air powered preferably. Instead of the shaft coming out slowly, I want it to shoot out instantly upon air pressure hitting it. What are those called? Steve Someone else mentioned the Surplus Center in Lincoln, NE. You might look at their hydraulic stuff. Hydraulics normally operate at 2000 psi. That could give you a little more speed. Maybe a hydraulic cylinder operated on air would be useful. They also have power packs. He is cracking pecans, not crushing diamonds. A fairly small air cylinder operating at a fairly low pressure with a bit of mass would do it . Finding the smaller lighter weaker stuff seems to be the problem. Surplus.com has pneumatic air cylinders, and they seem to be what I need. Have asked them a couple of questions, but they don't seem too helpful. https://www.surpluscenter.com/air.asp?catname=air Maybe someone can read this part on pneumatic air cylinders, and tell me what it is I need. I don't want a big shaft, a lot of air pressure to run it, nor a lot of force. And I want it to spring back into original position when air is released so it will be ready for the next nut. At five or six bucks apiece, if these work, they'd be the thing. Steve |
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