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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 |
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