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#936165 - 07/07/15 05:44 PM Torque wrenches and measuring torque  
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Matts_12GS Offline
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Matts_12GS  Offline
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Enfield, CT
I'm helping a friend do a top end on his electra glide and we are coming to the reassembly phase. With the motor in the frame there are a few bolts that we cannot reach to put a traditional socket on them.

We have been considering using a crow foot wrench to torque (it's a low'ish spec, something 14lbs and 30 degrees?) and I recently saw a thread on another forum about making an adapter using an obstruction wrench from the torque wrench.

All these make me wonder about the actual amount of torque being applied to the specific bolts and brought about 2 questions:

1. Is there a "best practice" type forumla to use for calculating actual torque?
2. If we use either method of adapting the torque wrench, does it matter the orientation to the torque wrench, e.g. @ 000 degrees straight off the end of the wrench, 090 degrees? Etc.

Thanks everyone!


Matt


2005 1200GS (Traveller)
IBA 37694

" ...if no one among us is capable of governing himself, then who among us has the capacity to govern someone else? " --Ronald Reagan
#936170 - 07/07/15 06:49 PM Re: Torque wrenches and measuring torque [Re: Matts_12GS]  
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TheOtherLee Offline
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TheOtherLee  Offline
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Wilsonville, Oregon, USA
Matt -

I've posted this before - maybe it will help.
Torque wrench extension reference


Channeling farfegnugen since 2011.
#936185 - 07/07/15 09:04 PM Re: Torque wrenches and measuring torque [Re: Matts_12GS]  
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greiffster Offline
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greiffster  Offline

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Clarksville, Tennessee
Originally Posted By: Matts_12GS

1. Is there a "best practice" type forumla to use for calculating actual torque?
2. If we use either method of adapting the torque wrench, does it matter the orientation to the torque wrench, e.g. @ 000 degrees straight off the end of the wrench, 090 degrees? Etc.


I'm not sure if there is a straight up formula for calculating the torque while using a crow foot, but it should be "easy" to figure out. Multiply the set torque on the click wrench times the increase in moment arm due to the length of the crow foot to calculate the actual torque applied at the moment the wrench clicks. So....

If the crow foot straight out the end of the wrench adds 1 inch and the set point on the wrench is 14 ft-lbs. Then 1.08x14=15.2 fl-bs. So when the wrench clicks, you have applied 15.2 ft-lbs to the nut. Always measure from the center of the ratchet to the “center” of the claw.

If the claw is 90 deg. to the wrench arm, than the applied torque should be equal to the click wrench setting (or really, really close).


-Mike
'08 GSA
"If I don't like it, I'm not blaming myself!"
K. Greiff
"Anything worth doing is worth overdoing."
M. Jagger
#936186 - 07/07/15 09:22 PM Re: Torque wrenches and measuring torque [Re: Matts_12GS]  
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Danny caddyshack Noonan Offline
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Danny caddyshack Noonan  Offline
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Near the mine, Utah
If you can get in there with a crows foot at 90 degrees to the wrench body, no conversion needed and it is still true torque.


Peter

God bless America!
Rule of rocketry #1: Pointy end up...stupid.
Danny, be the ball.
'12 R1200RT Midnight Blue.
99 R1100RT, KLR650 sold
TR6 (sold, wife can now park in the garage)
#937036 - 07/15/15 06:10 AM Re: Torque wrenches and measuring torque [Re: Matts_12GS]  
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elkroeger Offline
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elkroeger  Offline
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Posts: 3,041
Rochester WA
Here's something for you:

Adjustable torque wrench adapter


I'm a man, and I can change, if I have to, I guess.

Eric
#937251 - 07/17/15 02:52 PM Re: Torque wrenches and measuring torque [Re: Matts_12GS]  
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Mister Tee Offline
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Mister Tee  Offline
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Northern California
I use the German method. I make it gutentight.


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