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Posted by Gerald Miller on June 12, 2008, 7:44 pm
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wrote:
>On Thu, 12 Jun 2008 07:34:05 -0700 (PDT), John Martin
>
>>wrote:
>>>>
>>> If a wrench is used 'backwards' - the weak side might break.
>>> So the jaw was taken from a larger wrench - the long thread bar hangs out...
>>> Maybe the larger wrench had a broken handle from a pipe assist!
>>>
>>> Martin
>>>
>>> - Show quoted text -
>>
>>I'll bite, Martin. Which way do most people consider is backwards,
>>and which correct?
>
>Now you've done it, John. <g> (Just keep repeating to yourself, "The
>sum of the forces is is zero; the sum of the moments is zero; you
>can't push a string.")
But you CAN go piss up a rope!
Gerry :-)}
London, Canada
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Posted by Phil Kangas on June 12, 2008, 10:20 pm
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"Ned Simmons" <> wrote in message
> On Thu, 12 Jun 2008 07:34:05 -0700 (PDT),
John Martin wrote:
> >On Jun 11, 11:04 pm,
"Martin H. Eastburn" <
>
> >wrote:
> >>>
> >> If a wrench is used 'backwards' - the weak side might
break.
> >> So the jaw was taken from a larger wrench - the long
thread bar hangs out...
> >> Maybe the larger wrench had a broken handle from a pipe
assist!
> >>
> >> Martin
> >>
> >> - Show quoted text -
> >
> >I'll bite, Martin. Which way do most people consider is
backwards,
> >and which correct?
>
> Now you've done it, John. <g> (Just keep repeating to
yourself, "The
> sum of the forces is is zero; the sum of the moments is
zero; you
> can't push a string.")
>
> --
> Ned Simmons
Oh man oh man, I hope this thread doesn't deteriorate into a
battle on
whether or not 'centrifugal force' exists.......oh oh
......;>)
Phil Kangas, who climbed back up into the peanut gallery....
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Posted by Ned Simmons on June 13, 2008, 11:10 pm
Please log in for more thread options On Thu, 12 Jun 2008 22:20:06 -0400, "Phil Kangas"
>
>Oh man oh man, I hope this thread doesn't deteriorate into a
>battle on
>whether or not 'centrifugal force' exists.......oh oh
>......;>)
It could be worse, the thermodynamics of air pressure regulators
hasn't come up recently. <g>
--
Ned Simmons
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Posted by Martin H. Eastburn on June 12, 2008, 10:23 pm
Please log in for more thread options Take a wrench and hang it onto something.
One way you are putting the pressure on the top jaw, the other way
puts it on the bottom jaw.
You normally want it on the top one. The bottom jaw isn't as strong,
being that of a sliding jaw that moves side to side and in and out.
The latter can break if the main force is placed there.
Martin
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/
John Martin wrote:
> wrote:
>> If a wrench is used 'backwards' - the weak side might break.
>> So the jaw was taken from a larger wrench - the long thread bar hangs out...
>> Maybe the larger wrench had a broken handle from a pipe assist!
>>
>> Martin
>>
>> - Show quoted text -
>
> I'll bite, Martin. Which way do most people consider is backwards,
> and which correct?
>
> John Martin
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Posted by John Martin on June 13, 2008, 1:11 am
Please log in for more thread options wrote:
> Take a wrench and hang it onto something.
>
> One way you are putting the pressure on the top jaw, the other way
> puts it on the bottom jaw.
>
> You normally want it on the top one. =A0The bottom jaw isn't as strong,
> being that of a sliding jaw that moves side to side and in and out.
> The latter can break if the main force is placed there.
>
> Martin
>
Martin:
I think you're way off the mark with your mention of the "main force".
As I see it, if you're pulling on a wrench with 100 pounds of force on
the end of the handle, then the far jaw should have on it 100 more
pounds of force than the near jaw. It's pretty much meaningless,
though, because it is dwarfed by comparison to the force on the jaws
coming from the nut's trying to wedge them open. That force is equal
on both jaws.
I wasn't trying to set you up with a trick question, though. I do
expect that most people will say as you did: if you are pulling a
wrench, the adjustable jaw should be toward you. I'm not sure that's
right - here's why.
If you're pulling on a wrench with the solid jaw away from you, the
force is at the base of the solid jaw and the tip of the sliding jaw.
The force on the sliding jaw is also to push it against the wrench
frame.
If you're puling on a wrench with the solid jaw toward you, the force
is against the base of the sliding jaw, and is also to pull it away
from the wrench frame.
I'd rather have the force against the base of the sliding jaw, even
though doing it "backwards" like that does try to pull the jaw out of
the frame. But I'd like to hear what some others think.
John Martin
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