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"torque wrench" pump/compressor



 
 
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  #11  
Old October 11th 18, 08:30 PM posted to rec.bicycles.tech
AMuzi
external usenet poster
 
Posts: 9,855
Default "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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  #12  
Old October 11th 18, 08:36 PM posted to rec.bicycles.tech
Frank Krygowski[_4_]
external usenet poster
 
Posts: 6,426
Default "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
  #13  
Old October 11th 18, 11:04 PM posted to rec.bicycles.tech
Andre Jute[_2_]
external usenet poster
 
Posts: 8,826
Default "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
  #14  
Old October 11th 18, 11:10 PM posted to rec.bicycles.tech
Andre Jute[_2_]
external usenet poster
 
Posts: 8,826
Default "torque wrench" pump/compressor

On Thursday, October 11, 2018 at 5:45:23 PM UTC+1, Sir Ridesalot wrote:
On Thursday, October 11, 2018 at 10:55:07 AM UTC-4, Emanuel Berg wrote:
AMuzi 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?

WTF? Did I miss your joke?


You don't have to be condescending. Instead be
happy you have so advanced technology at your
business! OK, so it is called an air regulator.

Don't forget to answer my still-unanswered
question on "65 PSI". Unless of course you only
want to answer my "joke" questions?

--
underground experts united
http://user.it.uu.se/~embe8573


You need to understand that a lot of your "questions" sound suspiciously like trolling. Why not get a GOOD book on bicycle repair and learn the proper basic terminology and repair methods? Plus, with a good book you'd have the information at hand and not have to wait for replies from here.

BTW, as Frank stated, using a HIGH volume gas station air hose to fill a road-bicycle tire that has a comparatively very low volume will almost guarantee you'll blow your bicycle tire unless you're very quick at attaching and disengaging the hose.

Cheers


Don't be such a pompous dickhead, Ridealot. Not everyone pretends to know everything, unlike you. Not everyone grew up on your street corner, and consequently value questions differently, and ask them differently too. In any event, when there are so many people willing to answer questions on any given subject, people with something else to fill their minds have no need to remember minor techie details when all one has to do is ask and be patient for about five minutes.

Andre Jute
Fed up with mindless hall monitors
  #15  
Old October 12th 18, 12:03 AM posted to rec.bicycles.tech
Frank Krygowski[_4_]
external usenet poster
 
Posts: 6,426
Default "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),
** 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.


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
  #16  
Old October 12th 18, 12:06 AM posted to rec.bicycles.tech
Frank Krygowski[_4_]
external usenet poster
 
Posts: 6,426
Default "torque wrench" pump/compressor

On 10/11/2018 6:10 PM, Andre Jute wrote:
On Thursday, October 11, 2018 at 5:45:23 PM UTC+1, Sir Ridesalot wrote:
On Thursday, October 11, 2018 at 10:55:07 AM UTC-4, Emanuel Berg wrote:
AMuzi 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?

WTF? Did I miss your joke?

You don't have to be condescending. Instead be
happy you have so advanced technology at your
business! OK, so it is called an air regulator.

Don't forget to answer my still-unanswered
question on "65 PSI". Unless of course you only
want to answer my "joke" questions?

--
underground experts united
http://user.it.uu.se/~embe8573


You need to understand that a lot of your "questions" sound suspiciously like trolling. Why not get a GOOD book on bicycle repair and learn the proper basic terminology and repair methods? Plus, with a good book you'd have the information at hand and not have to wait for replies from here.

BTW, as Frank stated, using a HIGH volume gas station air hose to fill a road-bicycle tire that has a comparatively very low volume will almost guarantee you'll blow your bicycle tire unless you're very quick at attaching and disengaging the hose.

Cheers


Don't be such a pompous dickhead, Ridealot.


Right! That's Andre's job!

;-)


--
- Frank Krygowski
  #17  
Old October 12th 18, 12:29 AM posted to rec.bicycles.tech
John B. Slocomb
external usenet poster
 
Posts: 90
Default "torque wrench" pump/compressor

On Thu, 11 Oct 2018 16:55:04 +0200, Emanuel Berg
wrote:

AMuzi 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?


WTF? Did I miss your joke?


You don't have to be condescending. Instead be
happy you have so advanced technology at your
business! OK, so it is called an air regulator.

Don't forget to answer my still-unanswered
question on "65 PSI". Unless of course you only
want to answer my "joke" questions?


The pressure rating on the tire, put there my the manufacturer, is
probably to try to ensure that someone doesn't try to pump the tire up
to an abnormally high pressure at which it might explode, thus
destroying the tire and giving the owner grounds to sue the maker.
"Hey! Your tire exploded and hurt my finger and now you got to give me
a while bunch of money."
--

Cheers,

John B.
  #18  
Old October 12th 18, 12:32 AM posted to rec.bicycles.tech
John B. Slocomb
external usenet poster
 
Posts: 90
Default "torque wrench" pump/compressor

On Thu, 11 Oct 2018 19:55:06 +0200, Emanuel Berg
wrote:

Sir Ridesalot wrote:

You need to understand that a lot of your
"questions" sound suspiciously like trolling.
Why not get a GOOD book on bicycle repair and
learn the proper basic terminology and repair
methods? Plus, with a good book you'd have
the information at hand and not have to wait
for replies from here.


I don't "need" or "have" to do anything. I do
exactly what I want. Like now for example, what
I want to do is add you to my KILL file.
But don't worry, there are tons of negativistic
lamers there already to keep you company.



Well, I've mentioned that you might research your questions before
asking them and Frank has even given you a list of books that might
enlighten you and now Sir has told you flat out that you do sound like
a troll.

Perhaps it is you that is at fault and not the growing group that
question your intent.
--

Cheers,

John B.
  #19  
Old October 12th 18, 01:29 AM posted to rec.bicycles.tech
AMuzi
external usenet poster
 
Posts: 9,855
Default "torque wrench" pump/compressor

On 10/11/2018 6:03 PM, Frank Krygowski wrote:
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),
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.


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.


Thank you.

As a 10th grade dropout, I understand the limits of an
autodidact education.


--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #20  
Old October 12th 18, 03:49 AM posted to rec.bicycles.tech
JBeattie
external usenet poster
 
Posts: 3,497
Default "torque wrench" pump/compressor

On Thursday, October 11, 2018 at 4:06:50 PM UTC-7, Frank Krygowski wrote:
On 10/11/2018 6:10 PM, Andre Jute wrote:
On Thursday, October 11, 2018 at 5:45:23 PM UTC+1, Sir Ridesalot wrote:
On Thursday, October 11, 2018 at 10:55:07 AM UTC-4, Emanuel Berg wrote:
AMuzi 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?

WTF? Did I miss your joke?

You don't have to be condescending. Instead be
happy you have so advanced technology at your
business! OK, so it is called an air regulator.

Don't forget to answer my still-unanswered
question on "65 PSI". Unless of course you only
want to answer my "joke" questions?

--
underground experts united
http://user.it.uu.se/~embe8573

You need to understand that a lot of your "questions" sound suspiciously like trolling. Why not get a GOOD book on bicycle repair and learn the proper basic terminology and repair methods? Plus, with a good book you'd have the information at hand and not have to wait for replies from here.

BTW, as Frank stated, using a HIGH volume gas station air hose to fill a road-bicycle tire that has a comparatively very low volume will almost guarantee you'll blow your bicycle tire unless you're very quick at attaching and disengaging the hose.

Cheers


Don't be such a pompous dickhead, Ridealot.


Right! That's Andre's job!

;-)


https://www.youtube.com/watch?v=bcYppAs6ZdI

-- Jay Beattie.
 




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