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Thread: Where to get a good torque wrench Reply to Thread
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  Topic Review (Newest First)
01-28-2014 08:06 PM
WilliamTech
Quote:
Originally Posted by M_Angell View Post
You laugh but we actually get asked that at work from time to time. We get asked when our volumetric flasks were calibrated... they are certified volumetric flasks, they don't need calibration. Plus htf do you calibrate a glass flask? Lol.
LOL

01-28-2014 05:59 PM
slimvulcanrider
Quote:
Originally Posted by WilliamTech View Post
What's the calibration date of your Calibrator ?

this past June
01-28-2014 05:50 PM
M_Angell
Quote:
Originally Posted by WilliamTech View Post
What's the calibration date of your Calibrator ?

You laugh but we actually get asked that at work from time to time. We get asked when our volumetric flasks were calibrated... they are certified volumetric flasks, they don't need calibration. Plus htf do you calibrate a glass flask? Lol.
01-28-2014 05:09 PM
WilliamTech
Quote:
Originally Posted by slimvulcanrider View Post
you have to have a special tool to check the accuracy with, usually Snap-on dealer or one of those types of traveling tool trucks have one that they use. I have access to my own, I picked it up through the military at one of the "fire sales"
What's the calibration date of your Calibrator ?

01-28-2014 03:24 PM
slimvulcanrider
Quote:
Originally Posted by kemen3 View Post
What is a good way to test the accuracy?

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you have to have a special tool to check the accuracy with, usually Snap-on dealer or one of those types of traveling tool trucks have one that they use. I have access to my own, I picked it up through the military at one of the "fire sales"
01-28-2014 01:07 PM
emtdon
Quote:
Originally Posted by kemen3 View Post
What is a good way to test the accuracy? this is the link to the wrench i have. I've had it for about a year. i checked it on a snap on truck 3 months ago and was still accurate.

http://m.sears.com/index-g.html#/det...?source=online


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some mac or snapon guys can check them on there trucks.

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01-28-2014 09:40 AM
wmsonta Get a split beam torque wrench if you can afford it.
01-28-2014 09:22 AM
kemen3 What is a good way to test the accuracy?

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01-28-2014 08:03 AM
slimvulcanrider even a 1/4" vertical rise increases torque slightly, but the longer the increase in length, the more the torque increases.

on your crow foot theory you are correct, and that is also how the torque extensions work, because they aren't perfectly centered, the offset between the ratchet head and the socket is such that the length cancels out the mechanical advantage. also in a perfect world, a vertical length would offer no advantage, but due to human error, the extension acts like a lever, even though you think its perpendicular to the fastener you are working with.

I used to doubt this myself until one of my buddies showed me a trick. I was working on a project struggling to get a rusted #24 screw out of a flat panel. I had plenty of room all around the screw, literally miles. I was using a typical #2 cross tip screw driver to get the suborn screw out with out any luck. My buddy came by and saw me struggling. He said "Why don't you grab a longer screw driver?"
I got into an argument saying that a longer screw driver wouldn't help me, yada yada, yada. But I finally gave in to shut him up... But to my surprise the longer screw driver he handed me did the trick. I had been using a #2 Cross tip with a typical 6" shaft and handle. He handed me a 24" #2 cross tip, and it worked like a charm. After words to prove his point on how it worked, he took out a 1/4" drive torque wrench, several extensions ranging from 3/8" up to 24" and a didgital torque scale (used for calibrating torque wrenches). We set the Torque wrench to 5 lbs and hooked connected it directly to the scale. When the Torque Wrench clicked and wouldn't let any more torque be applied to the scale, the scale read 5 lbs/ft. We torqued three more times to give us an average for comparison. each time the scale read 5 lbs/ft, so we then added the shortest extention and the scale then read 5.10 lbs/ft... (at 5.05 lbs/ft we had to send our torque wrenches off for a replacement) and each extension we used there after kept climbing... at 24" we were pushing 18 lbs/ft.
01-28-2014 06:39 AM
jadabull Slim. I also wanted to add the difference between vertical and horizontal extensions. It was always my understanding that using a vertical extension (like a 6" ext to get into a recessed area) wouldn't really change the value (minimal at best) as long as I applied a constant force, but if I used a horizontal extension (like a crows foot) adding length which in turn would add more leverage, then that would change the values. Am I correct? I also wanted add that I heard if I position the crows foot perpendicular to the wrench it wouldn't add length/leverage, therefore not changing the value?
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