Torque Wrench Settings
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Senior User
Joined: Aug 2012
Posts: 218
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From: Ft. Worth
Torque Wrench Settings
Hello Everyone, Harbor Freight has a 1/2" drive torque wrench on sale for $9.99 with blowout coupon available on their site. The wrench is a clicker and looks to be well made.
What I want ro know is...If I am torqueing a bolt to 95 ft. lbs....and I need to use a 6" or 8" extension...how do I compensate the ft. lbs. for the extension since I don't have a set of torque wrench extensions?
Is there a "rule of thumb" for this or is there a calculation or formula to figure this out?
Thanks,
Bee4Can500
What I want ro know is...If I am torqueing a bolt to 95 ft. lbs....and I need to use a 6" or 8" extension...how do I compensate the ft. lbs. for the extension since I don't have a set of torque wrench extensions?
Is there a "rule of thumb" for this or is there a calculation or formula to figure this out?
Thanks,
Bee4Can500
Cargo Master
Joined: Mar 2008
Posts: 2,562
Likes: 207
From: Washington
Hello Everyone, Harbor Freight has a 1/2" drive torque wrench on sale for $9.99 with blowout coupon available on their site. The wrench is a clicker and looks to be well made.
What I want ro know is...If I am torqueing a bolt to 95 ft. lbs....and I need to use a 6" or 8" extension...how do I compensate the ft. lbs. for the extension since I don't have a set of torque wrench extensions?
Is there a "rule of thumb" for this or is there a calculation or formula to figure this out?
Thanks,
Bee4Can500
What I want ro know is...If I am torqueing a bolt to 95 ft. lbs....and I need to use a 6" or 8" extension...how do I compensate the ft. lbs. for the extension since I don't have a set of torque wrench extensions?
Is there a "rule of thumb" for this or is there a calculation or formula to figure this out?
Thanks,
Bee4Can500
This is only for when you are adding or subtracting total length.
If your just adding a straight extension the number stays the same.
Jim
Laughing Gas
Joined: Nov 2011
Posts: 1,033
Likes: 11
From: Wausau, WI
When using a straight extension, you will achieve the same torque. The thought that you have to compensate for the extension is just a myth. Now, if you use an offset extension, then you have to figure out the new torque value, as it changes the distance between the fastener and the head of the wrench.
IMO, would you really trust a 9.99 torque wrench to stay accurate for very long? I would get at least a Craftsman or the like. You get what you pay for. If you are just doing some body or frame bolts once in a while, it may be fine. I would never use one of those on an engine.
IMO, would you really trust a 9.99 torque wrench to stay accurate for very long? I would get at least a Craftsman or the like. You get what you pay for. If you are just doing some body or frame bolts once in a while, it may be fine. I would never use one of those on an engine.
Thread Starter
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Senior User
Joined: Aug 2012
Posts: 218
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From: Ft. Worth
Accuracy
When using a straight extension, you will achieve the same torque. The thought that you have to compensate for the extension is just a myth. Now, if you use an offset extension, then you have to figure out the new torque value, as it changes the distance between the fastener and the head of the wrench.
IMO, would you really trust a 9.99 torque wrench to stay accurate for very long? I would get at least a Craftsman or the like. You get what you pay for. If you are just doing some body or frame bolts once in a while, it may be fine. I would never use one of those on an engine.
IMO, would you really trust a 9.99 torque wrench to stay accurate for very long? I would get at least a Craftsman or the like. You get what you pay for. If you are just doing some body or frame bolts once in a while, it may be fine. I would never use one of those on an engine.
You're right I would not trust it to do engine work, but for the price it will make a good starter for a kid just starting out on small engine, bicycles, etc...to learn how to use one or for doing the grunt work on bolts that don't require such accuracy that gives a kid a chance to learn wrenching and you don't want them touching your good wrenches just yet...
Laughing Gas
Joined: Nov 2011
Posts: 1,033
Likes: 11
From: Wausau, WI
You're right I would not trust it to do engine work, but for the price it will make a good starter for a kid just starting out on small engine, bicycles, etc...to learn how to use one or for doing the grunt work on bolts that don't require such accuracy that gives a kid a chance to learn wrenching and you don't want them touching your good wrenches just yet...
That's a good idea. When they learn a torque wrench is not a hammer, then upgrade.
I learned the other way...If you break or lose a tool, you're dead. It worked.
Senior User
Joined: Aug 2012
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Also, keep in mind that the high dollar torque wrenches need calibration every so often as well. The harbor freight ones will get the job done just fine, as equal torque on all associated fasteners is more important than their being at a specific ft/lb.
I.E. you would rather have a wheel that was supposed to be torqued to 110 ft/lbs. be torqued 106 ft/lbs. on all lug nuts than to have 5 or 8 different values across the bolt pattern. Even if the low dollar one is off a few %, it is no problem as long as it is consistently off. If it were giving you a different reading each time, then you would have problems!
I.E. you would rather have a wheel that was supposed to be torqued to 110 ft/lbs. be torqued 106 ft/lbs. on all lug nuts than to have 5 or 8 different values across the bolt pattern. Even if the low dollar one is off a few %, it is no problem as long as it is consistently off. If it were giving you a different reading each time, then you would have problems!
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