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"torque wrench" pump/compressor
Just out of curiosity, is there a "torque
wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? -- underground experts united http://user.it.uu.se/~embe8573 |
#2
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"torque wrench" pump/compressor
On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg
wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. -- Cheers, John B. |
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"torque wrench" pump/compressor
On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote:
On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. My experience from 50+ years ago says not to rely on those things, although I suppose they may be different now. Back then I blew a tire off the rim with one. I suspect the problem was the volume of each pumping stroke. In a large sized car tire, the volume surge with each big stroke would be absorbed and barely raise the pressure. In a low volume bike tire, it caused an explosion. That's my guess anyway. I usually inflate using a manual floor pump with a gage. It's easy enough to stop pumping when the dial reads the desired temperature. - Frank Krygowski |
#4
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"torque wrench" pump/compressor
On Thu, 11 Oct 2018 09:27:02 -0700 (PDT),
Frank Krygowski wrote: On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote: On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. My experience from 50+ years ago says not to rely on those things, although I suppose they may be different now. Back then I blew a tire off the rim with one. I suspect the problem was the volume of each pumping stroke. In a large sized car tire, the volume surge with each big stroke would be absorbed and barely raise the pressure. In a low volume bike tire, it caused an explosion. That's my guess anyway. I usually inflate using a manual floor pump with a gage. It's easy enough to stop pumping when the dial reads the desired temperature. Don't you mean, when the dial reads the desired foot-pounds? -- Ted Heise West Lafayette, IN, USA |
#5
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"torque wrench" pump/compressor
On Thu, 11 Oct 2018 17:53:05 +0000 (UTC),
Theodore Heise wrote: On Thu, 11 Oct 2018 09:27:02 -0700 (PDT), Frank Krygowski wrote: On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote: On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. My experience from 50+ years ago says not to rely on those things, although I suppose they may be different now. Back then I blew a tire off the rim with one. I suspect the problem was the volume of each pumping stroke. In a large sized car tire, the volume surge with each big stroke would be absorbed and barely raise the pressure. In a low volume bike tire, it caused an explosion. That's my guess anyway. I usually inflate using a manual floor pump with a gage. It's easy enough to stop pumping when the dial reads the desired temperature. Don't you mean, when the dial reads the desired foot-pounds? Or lumens, if you want a multiple thread tie. -- Ted Heise West Lafayette, IN, USA |
#6
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"torque wrench" pump/compressor
On 10/11/2018 12:53 PM, Theodore Heise wrote:
On Thu, 11 Oct 2018 09:27:02 -0700 (PDT), Frank Krygowski wrote: On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote: On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. My experience from 50+ years ago says not to rely on those things, although I suppose they may be different now. Back then I blew a tire off the rim with one. I suspect the problem was the volume of each pumping stroke. In a large sized car tire, the volume surge with each big stroke would be absorbed and barely raise the pressure. In a low volume bike tire, it caused an explosion. That's my guess anyway. I usually inflate using a manual floor pump with a gage. It's easy enough to stop pumping when the dial reads the desired temperature. Don't you mean, when the dial reads the desired foot-pounds? funny. Pressure is mass/area usually. Except on RBT. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#7
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"torque wrench" pump/compressor
On Thursday, October 11, 2018 at 8:30:53 PM UTC+1, AMuzi wrote:
On 10/11/2018 12:53 PM, Theodore Heise wrote: On Thu, 11 Oct 2018 09:27:02 -0700 (PDT), Frank Krygowski wrote: On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote: On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. My experience from 50+ years ago says not to rely on those things, although I suppose they may be different now. Back then I blew a tire off the rim with one. I suspect the problem was the volume of each pumping stroke. In a large sized car tire, the volume surge with each big stroke would be absorbed and barely raise the pressure. In a low volume bike tire, it caused an explosion. That's my guess anyway. I usually inflate using a manual floor pump with a gage. It's easy enough to stop pumping when the dial reads the desired temperature. Don't you mean, when the dial reads the desired foot-pounds? funny. Pressure is mass/area usually. Except on RBT. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Nah, Franki-boy is just bragging, implying that he pumps so powerfully that the sudden increase in pressure in the tube raises the temperature of the air noticeably. It does raise the question of how short, slight racing mechanics manage to push down the handle on road tubes inflated to awesome bars. I notice my SKS Rennkommprrrressorrrr is rated to 16 bars... of which I use two and a bit, never more than 3 bar Andre Jute When professional photographers had arms like gorillas |
#8
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"torque wrench" pump/compressor
On 10/11/2018 3:30 PM, AMuzi wrote:
On 10/11/2018 12:53 PM, Theodore Heise wrote: On Thu, 11 Oct 2018 09:27:02 -0700 (PDT), Â*Â* Frank Krygowski wrote: Â* On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote: On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is Â*Â* inflated to the specified pressure the inflation stops and a Â*Â* bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. Â* My experience from 50+ years ago says not to rely on those Â* things, although I suppose they may be different now. Â* Back then I blew a tire off the rim with one. I suspect the Â* problem was the volume of each pumping stroke. In a large sized Â* car tire, the volume surge with each big stroke would be Â* absorbed and barely raise the pressure. In a low volume bike Â* tire, it caused an explosion. That's my guess anyway. Â* I usually inflate using a manual floor pump with a gage. It's Â* easy enough to stop pumping when the dial reads the desired Â* temperature. Don't you mean, when the dial reads the desired foot-pounds? funny. Pressure is mass/area usually. Except on RBT. No, sorry, it's FORCE per unit area. https://whatis.techtarget.com/definition/pressure https://en.wikipedia.org/wiki/Pressure Mass vs. weight vs. other forces is a big item of confusion for physics and engineering students. Teachers work hard to correct the confusion. -- - Frank Krygowski |
#9
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"torque wrench" pump/compressor
On 10/11/2018 1:53 PM, Theodore Heise wrote:
On Thu, 11 Oct 2018 09:27:02 -0700 (PDT), Frank Krygowski wrote: On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote: On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. My experience from 50+ years ago says not to rely on those things, although I suppose they may be different now. Back then I blew a tire off the rim with one. I suspect the problem was the volume of each pumping stroke. In a large sized car tire, the volume surge with each big stroke would be absorbed and barely raise the pressure. In a low volume bike tire, it caused an explosion. That's my guess anyway. I usually inflate using a manual floor pump with a gage. It's easy enough to stop pumping when the dial reads the desired temperature. Don't you mean, when the dial reads the desired foot-pounds? Oh geez, my mistake! But: Neither! I stop when it reads the desired PRESSURE! Around here we use psi = pounds per square inch. Weirdly enough, my pump's pressure gauge is also graduated in kg/cm^2. I would have used that as a bad example in my courses, since kg is properly used to measure mass, not force. And pressure is force per unit area. (This indicates that the SI system gets misused as much as the U.S. or Imperial system.) -- - Frank Krygowski |
#10
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"torque wrench" pump/compressor
On Thu, 11 Oct 2018 15:36:04 -0400, Frank Krygowski
wrote: On 10/11/2018 1:53 PM, Theodore Heise wrote: On Thu, 11 Oct 2018 09:27:02 -0700 (PDT), Frank Krygowski wrote: On Thursday, October 11, 2018 at 5:00:33 AM UTC-4, John B. Slocomb wrote: On Thu, 11 Oct 2018 08:54:38 +0200, Emanuel Berg wrote: Just out of curiosity, is there a "torque wrench" pump or compressor? I.e., you would screw on the presta valve, set the gizmo to e.g. 35psi, engage it, and instead of watching the indicator, automagically at the right level it would stop? Most of the gas stations here use an air station that you can set for your desired pressure and then just plug the hose onto the tire valve - there is a little clamp to hold it there. When the tire is inflated to the specified pressure the inflation stops and a bell rings. Since they aren't manufactured here I had assumed that the rest of the world had them too. My experience from 50+ years ago says not to rely on those things, although I suppose they may be different now. Back then I blew a tire off the rim with one. I suspect the problem was the volume of each pumping stroke. In a large sized car tire, the volume surge with each big stroke would be absorbed and barely raise the pressure. In a low volume bike tire, it caused an explosion. That's my guess anyway. I usually inflate using a manual floor pump with a gage. It's easy enough to stop pumping when the dial reads the desired temperature. Don't you mean, when the dial reads the desired foot-pounds? Oh geez, my mistake! But: Neither! I stop when it reads the desired PRESSURE! Around here we use psi = pounds per square inch. Weirdly enough, my pump's pressure gauge is also graduated in kg/cm^2. I would have used that as a bad example in my courses, since kg is properly used to measure mass, not force. And pressure is force per unit area. (This indicates that the SI system gets misused as much as the U.S. or Imperial system.) But isn't "pound" a measurement of mass also :-? -- Cheers, John B. |
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