Inch pound Foot Pounds
Road Warrior
Joined: Mar 2009
Posts: 1,485
Likes: 232
From: Ohio
"With all due respect, apparently you have never seen a calibration sheet from Snap-on or from CDI (a Snap-On company). Quality wrenches, properly calibrated, are very accurate anywhere in their range.
Now if you run cheap Chinese ****, well, that's another story.
And for the OP...the quickest way to damage threads is to use a foot pound wrench for an inch pound application...and of course if the foot pound wrench is a cheap piece of **** you are almost guaranteed to ***** up your fastener. "
With all due respect, I don't care what the snap-on or craftsman cal certs say because most of the time they are out of tolerance when I receive them new from the mfr. I have cal'd thousands and thousands of torque wrenches and what I said is true.
Now if you run cheap Chinese ****, well, that's another story.
And for the OP...the quickest way to damage threads is to use a foot pound wrench for an inch pound application...and of course if the foot pound wrench is a cheap piece of **** you are almost guaranteed to ***** up your fastener. "
With all due respect, I don't care what the snap-on or craftsman cal certs say because most of the time they are out of tolerance when I receive them new from the mfr. I have cal'd thousands and thousands of torque wrenches and what I said is true.
Cruiser
Joined: Jun 2006
Posts: 129
Likes: 0
From: Houston, Texas
Just another dummy here, but are the torque values specified in the manual for dry applications or based on some form of lubrication? I would think that thread lubrication would have an affect on torque values.
"And for the OP...the quickest way to damage threads is to use a foot pound wrench for an inch pound application...and of course if the foot pound wrench is a cheap piece of **** you are almost guaranteed to ***** up your fastener. "
This statement is BS.
The next time you have a wrench on your transducer click the wrench off in lbf.ft then switch the display to lbs.in. then do the math. If it don't equal the same amount then your equipment needs calibrated. Been in the torque and tension Biz for over 20 years. You name it I've worked on it. Improperly using a torque wrench will change the accuracy of the wrench itself, and most people don't know the proper way of using one. Example: If your wrench is laying around and is set at 50 lbf.ft, and you need 25 lbf.ft. So you set it to 25 and go and tighten your nut. I'll guarantee you that that the accuracy of the initial click would be 6-10% off of set value.
You should always click the wrench off several times after adjusting it, before using it. Put the square drive in the vise and click it off a few time's. This allows the spring in the wrench to settle to its set position. It will also give you a feel for how much force will be applied to the handle while tightening your bolts.
Always store your wrench in it's lowest setting.
This statement is BS.
The next time you have a wrench on your transducer click the wrench off in lbf.ft then switch the display to lbs.in. then do the math. If it don't equal the same amount then your equipment needs calibrated. Been in the torque and tension Biz for over 20 years. You name it I've worked on it. Improperly using a torque wrench will change the accuracy of the wrench itself, and most people don't know the proper way of using one. Example: If your wrench is laying around and is set at 50 lbf.ft, and you need 25 lbf.ft. So you set it to 25 and go and tighten your nut. I'll guarantee you that that the accuracy of the initial click would be 6-10% off of set value.
You should always click the wrench off several times after adjusting it, before using it. Put the square drive in the vise and click it off a few time's. This allows the spring in the wrench to settle to its set position. It will also give you a feel for how much force will be applied to the handle while tightening your bolts.
Always store your wrench in it's lowest setting.
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
Likes: 173
From: Simi Valley, CA
Lubrication, and also the type of lubrication, has a big time effect! Just another variable in the torquing of fasteners and there are many. Unless otherwise specified, I will always assume a torque spec is for a lightly lubricated (like motor oil, or loctite where appropriate) fastener. Don't know if that's right but that's what I always do... If I'm using a torque wrench which is hardly ever - but that's a whole 'nuther discussion.
Tourer
Joined: May 2011
Posts: 300
Likes: 6
From: South Carolina
Only the cheap wrenches vary more than a couple % from the lowest setting to the highest. I just grabbed my CDI in lb wrench that has a range of 30-150 in lbs in both directions. Clockwise is 30.14 = .5% 89.26 = .8% 151.48 = 1.0% Close enough for me. 10% or 20% throw it in the trash !
Billy
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