komat

will you lose torque while using a extension while torqueing things with a torque bar

Chiovnidca

no

Padawan

If you're talking about this type of extension:



Then the answer is no, it won't affect the torque values when using a torque wrench.

komat

hmm one of my friend told me it would
so i just wanted to make sure

nocturnaldragon

Are you guys sure about that? When you use an impact gun with an extension you do lose torque so why is it different with a torque wrench? Im not saying your wrong im just curious to the thinking behind your answers.

komat

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nocturnaldragon &raquo;</TD></TR><TR><TD CLASS="quote">Are you guys sure about that? When you use an impact gun with an extension you do lose torque so why is it different with a torque wrench? Im not saying your wrong im just curious to the thinking behind your answers.</TD></TR></TABLE>

i want to know too!

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nocturnaldragon &raquo;</TD></TR><TR><TD CLASS="quote">Are you guys sure about that? When you use an impact gun with an extension you do lose torque so why is it different with a torque wrench? Im not saying your wrong im just curious to the thinking behind your answers.</TD></TR></TABLE>
With the torque wrench your putting a steady presure on it. With the impact it absorbs a little of each hit.

snoochtodanooch

using an extension doesn't change the torque measurement.

nocturnaldragon

Is there a rule to how long that extension can be or dosent it matter? say Im using my 18" extension compared to my 2" extension.

funvtec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">
With the torque wrench your putting a steady presure on it. With the impact it absorbs a little of each hit.</TD></TR></TABLE>

correct with an impact you will loose torque with a torque wrench the pressure is constant so the reading is accurate

Archidictus

From a torque-wrench standpoint, an extension won't throw off the values enough so that you over- or under-tighten anything, if that's what you're asking.

From a physics standpoint, yes, you do lose torque through an extension because the torsional force is lost in the slight - but measureable - deformation along the length of said extension. The longer the extension, the more torque is lost.

Just another handy physics blurb for your mind bending pleasure.

Padawan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Archidictus &raquo;</TD></TR><TR><TD CLASS="quote">From a torque-wrench standpoint, an extension won't throw off the values enough so that you over- or under-tighten anything, if that's what you're asking.

From a physics standpoint, yes, you do lose torque through an extension because the torsional force is lost in the slight - but measureable - deformation along the length of said extension. The longer the extension, the more torque is lost.</TD></TR></TABLE>

Correct. I'd still like to emphasize your first statement and how minute the torque discrepancies would be with extensions of reasonable length and diameter, combined with the relatively low torque values that are typically applied when working on these cars.

Now, if you're using a crowfoot or similar type of extension that physically alters the geometry of the wrench (by extending the length of the lever), then you'll want to use a formula or calculator such as the one found in this link to determine the corrected torque value.

Archidictus

How's Coruscant treating you these days, Padawan?

Deemeetree

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Archidictus &raquo;</TD></TR><TR><TD CLASS="quote">From a torque-wrench standpoint, an extension won't throw off the values enough so that you over- or under-tighten anything, if that's what you're asking.

From a physics standpoint, yes, you do lose torque through an extension because the torsional force is lost in the slight - but measureable - deformation along the length of said extension. The longer the extension, the more torque is lost.

Just another handy physics blurb for your mind bending pleasure.</TD></TR></TABLE>

I concur. Physics is my favorite subject, yet I threw away my 3 years of Mechanical Engineering to become an Electrician, go figure.

Padawan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Archidictus &raquo;</TD></TR><TR><TD CLASS="quote">How's Coruscant treating you these days, Padawan?</TD></TR></TABLE>

LOL. Hasn't been the same since the Clone Wars began.

Mleach

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Archidictus &raquo;</TD></TR><TR><TD CLASS="quote">The longer the extension, the more torque is lost.</TD></TR></TABLE>

This is true all other factors constant. But a longer wrench is not neccesarily the problem, the only thing that could tell you if you are losing torque is the amount of deformation.

snoochtodanooch

i have actually never used crow's feet. It really seems that there isn't much of a use for them on honda's at least. I am sure if i was working on big v8's in tight spaces they would come in handy occaisionally, but as far as hondas i have never seen a need for one.