Torque Wrench reset - JeepForum.com
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post #1 of 17 Old 11-07-2018, 10:06 PM Thread Starter
electrum
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Torque Wrench reset

i've been working on cars for 55 years, and a mechanic when i was in my 20s.
my son-in-law the other day said i should be setting my torque wrench back to 'zero' when i'm done with it or it will affect it's accuracy.
i've never heard this before, but it seems to make sense.

anyone else do this when they put away the torque wrench?


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post #2 of 17 Old 11-07-2018, 10:43 PM
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The instructions will tell you to do that.
But after 55 years I think the damage is done.

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post #3 of 17 Old 11-08-2018, 07:24 AM
cranbiz
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Yes, I always reset my torque wrench's to zero.

I have several different manufacturers tools, every one of them state to set to 0 when done.

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post #4 of 17 Old 11-08-2018, 12:54 PM
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The reason for storing the torque wrench turned down at its lowest setting is to reduce or prevent the spring inside taking a set, which would alter the calibrated torque output of the wrench. You can take a look at the schematic and explanation to better understand the hows and whys here: click torque wrench

In addition to storing the torque wrench at its lowest setting, you should never unscrew the adjuster lower than the lowest setting -- this can also mess up the calibration of the wrench.

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post #5 of 17 Old 11-08-2018, 04:44 PM Thread Starter
electrum
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ok, i'll start ratcheting them down when i'm done.
the son-in-law finally proved his worth...

gone: 91 YJ 4.0, 00 XJ 4.0, 04 WJ 4.0
gone: 08 Charger SRT8 SuperBee
99 XJ 4.0
13 WK2 5.7
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post #6 of 17 Old 11-08-2018, 05:12 PM
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When is the last time you had it checked? I have seen brand new snap-on's fail....
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post #7 of 17 Old 11-08-2018, 05:34 PM
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Quote:
Originally Posted by electrum View Post
the son-in-law finally proved his worth... <img src="https://www.jeepforum.com/ubb/smile.gif" border="0" alt="" title="Smilie" class="inlineimg" />
Best post ever!

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post #8 of 17 Old 11-09-2018, 02:02 PM
gutthans
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Getting the wrench re-calibrated might be a good option at this point if its got some life left. Maybe not a big deal for suspension or body nuts, but engine related torque can be picky and problematic when off by too much, IMHO.
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post #9 of 17 Old 11-10-2018, 03:00 PM
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It really depends on the type of torque wrench. The click type should be backed off all they way.



I've got a WWII vintage Bonney No. 66 torque wrench that is still accurate , or at least as accurate as my Harbor Freight torque meter can register. No need to worry about resetting it every time as the measurement mechanism isn't under any load unless it's in use.



Those are the 2 types I'm familiar with that can be adjusted. Not sure on any others.

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post #10 of 17 Old 01-24-2019, 08:28 PM
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Calibrated? we are not working on NASA rockets. I work in aerospace, there is no calibration--its a verification check that is all. Indicators have a jeweled movement., you can't change it. I love this place

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post #11 of 17 Old 01-24-2019, 08:58 PM
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Quote:
Originally Posted by LJWrangler View Post
Calibrated? we are not working on NASA rockets. I work in aerospace, there is no calibration--its a verification check that is all. Indicators have a jeweled movement., you can't change it. I love this place
What do you do in aerospace, specifically?

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post #12 of 17 Old 01-27-2019, 08:35 AM
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Manufacture turbine engines from 1500 to 40,000 hp. 24 yrs later and still having a great time. Hard tooling can be adjusted/calibrated so can micrometers. Calipers, indicators and torque wrenches are a certified verification. Average garage guy isn't going to buy a $1000 "calibrateable" torque wrench. I have checked a few Harbor freight and Amazon torque wrenches in the gauge/cal room, they are surprisingly accurate +- 1-2lbs.

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post #13 of 17 Old 03-27-2019, 01:37 AM
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it there any instruction on how to reset my torque wrench's to zero?
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post #14 of 17 Old 03-28-2019, 10:02 PM
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Quote:
Originally Posted by Chasen11 View Post
it there any instruction on how to reset my torque wrench's to zero?
Just return it to the lowest setting...do not back it all the way off, just the lowest value and you are done.
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post #15 of 17 Old 05-16-2019, 12:34 AM
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If you use a split beam torque wrench, you don't have to worry about it. Well worth the cost.

Precision instruments is the one I have. They make the snapon wrenches also.


My old torque wrench with the spin handle seemed to work fine, torqued my head to spec. Car ran a bit odd, retorqued with a split beam, and it was off by about 30 lbs. Granted I had my wrench for years, and abused it so it probably took a set. The split beams won take a set, and you don't have to reset them every time.
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