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  #1  
Old 04-28-2011, 10:35 AM
Doctor Wily Doctor Wily is offline
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Default is +/- 2lb/ft acceptable 1/2" drive torque wrench?

Hi everyone,


I have a Snap-on torque wrench I took in to my class today. In the tool crib we have a torque wrench calibration tool. The tool crib attendant checked my wrench and it read 49ft/lb on the calibrator when it was dialed into 50 on the wrench.

At 200 ft/lb on the wrench it read 202 on the calibrator.

Is this 1-2 ft/lb difference acceptable?

thank you!
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  #2  
Old 04-28-2011, 12:51 PM
SpitfireEMT SpitfireEMT is offline
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Default Re: is +/- 2lb/ft acceptable 1/2" drive torque wrench?

I would think so. Most fasteners have a semi-forgiving torque range, so a pound or two isnt bad.
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  #3  
Old 04-28-2011, 08:34 PM
zx6rrdan zx6rrdan is offline
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Default Re: is +/- 2lb/ft acceptable 1/2" drive torque wrench?

Yeah 1% accurate is pretty good.
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Old 04-29-2011, 01:44 AM
STL STL is offline
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Default Re: is +/- 2lb/ft acceptable 1/2" drive torque wrench?

At work ours are allowed a +/- of up to 2 ft/lb
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Old 04-29-2011, 09:23 PM
Doctor Wily Doctor Wily is offline
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Default Re: is +/- 2lb/ft acceptable 1/2" drive torque wrench?

Thanks for the info everyone. I'll go ahead and call this good then, lol
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Old 04-29-2011, 10:24 PM
richarddhoward richarddhoward is offline
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Default Re: is +/- 2lb/ft acceptable 1/2" drive torque wrench?

Aiming for 50 ft lbs, and you got 49, call this one tits! That's what we set ours at work to for a tolerance, and we have all different sizes, trust me, yours is just fine. What are you going to school for?
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Old 11-02-2011, 01:03 PM
skulldrinker skulldrinker is offline
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Default Re: is +/- 2lb/ft acceptable 1/2" drive torque wrench?

sounds good to me, I just use the impact anyway .
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  #8  
Old 12-02-2011, 09:42 AM
silentbob4x4 silentbob4x4 is offline
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Default Re: is +/- 2lb/ft acceptable 1/2" drive torque wrench?

I asked one of our Marine calibrations technicians. He said @ 2.5 to 3% is the norm when it comes to torque wrenches. Anything above 5% and it's time for a new wrench. The higher you go, the more you will see between the wrench and calibration device. Yours is well within standard. 1% off at 200ftlbs. Good wrench.
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