I need to advise a US customer of the correct torque setting for some
4mm screws. I need to know the normal units Americans would use on their torque drivers. Ounce inches? Pound inches? The SI setting is 0.9kgf.cm.
-- Either is acceptable, with "ozf.in" perhaps being more convenient for the value you state.
Yes. Ounce/inch is what is used most often for small fasteners.
Most that are used for small electronic assemblies.
There is a mil spec for US sizes,and I am fairly certain there would be US declared specs even for metric sized fasteners.
I found this, but it isn't the one I was looking for. It is the test method, which might have some values declared in it.
kgf? cm? The SI units are newtons and meters!
--
John Larkin, President Highland Technology Inc
Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
Kgf.cm? And you're trying to tweak us for not adhering to MKS?
Kgf is a bastard unit, for sure, and cm isn't exactly a meter on some even exponent of 1000 thereof.
-- Tim Wescott Control system and signal processing consulting www.wescottdesign.com
-- http://en.wikipedia.org/wiki/International_System_of_Units
So what's kgf?
-- Regards, Joerg http://www.analogconsultants.com/
That's not SI. SI would be newton-meters.
12.5 ounce-inch. 0.781 pound-inch.
--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)
Kilogram force - the force of the weight of a kilogram, about 10 Newtons. It was also called a kilopond.
-- Tauno Voipio
Hey, we knew that.
**********************************John Larkin, President Highland Technology, Inc
jlarkin at highlandtechnology dot com
Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
Interesting that n-m is a unit of torque and a unit of energy.
**********************************John Larkin, President Highland Technology, Inc
jlarkin at highlandtechnology dot com
Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
But not interesting that ft-lb is as well?
Newton-meters is torque, like pounds-feet.
Meter-newtons is energy, like foot-pounds.
--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)
You don't have that confusion in SI, because 1m * 1N = 1J. A number specified in newton metres is always a torque.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net
Why does all this metric stuff keep on changing and changing? Why can't they just keep a unit? IIRC the metric unit of pressure has had at least three designators over the last 50 years. Atmospheres, bars, pascals, whetever. You might not like the imperial units but a PSI has been a PSI pretty much since the pilgrims came over.
-- Regards, Joerg http://www.analogconsultants.com/
VA is a measure of energy and of power. Same thing, just the angle between the multiplied quantities.
Tim
-- Job security and jealously fending off the English way.
What units do they fill tires/tyres/pneus with Over There?
**********************************John Larkin, President Highland Technology, Inc
jlarkin at highlandtechnology dot com
Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
-- Then why ask?
I suppose Joerg was tweaking you.
**********************************John Larkin, President Highland Technology, Inc
jlarkin at highlandtechnology dot com
Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
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