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General Discussion: General Motorcycle Discussion. If it's related to motorcycles in any way, and doesn't fit into a more specific forum, it goes here. | |||||||
08-21-2004, 5:14 PM
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| Join Date: 04-17-2002 Location: Cool, CA
Bike(s): 929, EX250rrr Age: 44 Posts: 1,666
Rep:  (107) Rep Power: 9
| Torque and Hand Tools I've got a dumb question(s): Does using a universal joint with a torque wrench affect the accuracy of the torque applied? How about a crow's foot? Help me. I'm old and confused.  | |
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08-21-2004, 5:23 PM
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     Join Date: 06-05-2001 Location: Murder City, Michigan
Bike(s): 2007 RC51 Age: 58 Posts: 8,271
Rep:  (1219) Rep Power: 28
| Re: Torque and Hand Tools Quote:
The formulae I have are as follows: T(W) = T(E) * L/L+E or T(E) = T(W) * L+E/L Where: E = Effective length of extension measured along centerline of the wrench L = Lever length of wrench (center of grip to center of socket drive) T(W) = Torque set on wrench T(E) = Torque applied by the extension to the fastener | |
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08-21-2004, 5:36 PM
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| Join Date: 04-17-2002 Location: Cool, CA
Bike(s): 929, EX250rrr Age: 44 Posts: 1,666
Rep: (107) Rep Power: 9
| Re: Torque and Hand Tools Thanks abtech, I was hoping you'd reply. I never thought about the length of the extension affecting applied torque...just assumed that as long as it was straight it wouldn't matter. So do you think it would be fair to say that using a universal would be no different than a straight extension with the addition of some (small) friction loss? I.E. no other changes due to different angles? Crow's foot is still confusing to me...not sure how to account for the drive center being offset from the "driven" center. Sounds like a lever...and a multiplication of torque.  |
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08-21-2004, 7:34 PM
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| Team Visa Racing   Join Date: 05-29-2001 Location: Campbell, CA
Bike(s): 04 GL1800A,00 929RR,87 CR500R,81 CB900F,71 CB836K1 Age: 45 Posts: 3,950
Rep: (443) Rep Power: 15
| Re: Torque and Hand Tools I position Crows foot wrenches at a 45 degree angle to the center line of the torque wrench. Starting with it fully extended out, turn it 45 degrees either left or right. It will be very close.
__________________ Ride Red |
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08-22-2004, 3:15 AM
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 Join Date: 05-23-2001 Location: Around here.
Bike(s): Addicted to them. Posts: 4,302
Rep: (1106) Rep Power: 23
| Re: Torque and Hand Tools I've been trying to get rid of my crows feet for years  |
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08-22-2004, 11:52 AM
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| Join Date: 07-06-2004 Location: Pa. USA
Bike(s): 02, 954RR Blk/Slvr 03 YFM350M Quad 01 929RR < No Age: 48 Posts: 681
Rep: (20) Rep Power: 5
| Re: Torque and Hand Tools I'm an F.A.A. License Tech. W/20yrs exp. 45 degree on crows foot is wrong.  It has to be 90 degrees to the head of the TQ wrench if you want proper TQ. |
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08-22-2004, 11:57 AM
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| Join Date: 04-17-2002 Location: Montreal, Quebec
Bike(s): GSX-R1000K4 Ltd Posts: 2,469
Rep: (11) Rep Power: 9
 | Re: Torque and Hand Tools Quote:
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