Torque wrench tester

[zippster]

With having a torque wrench addiction, it's getting expensive to send off my wrenches for calibration just to find out they are still within spec.

I was wondering if anyone has used one of these:

https://www.nationaltoolwarehouse.c...MIsPrmi9TL6QIVUL7ACh2fHgFNEAQYAyABEgLfUfD_BwE

 

[OneDollarSaab]

No I just put a nut in a vise, put the torque wrench on it, and hang weights off the handle. Gets you close enough.

 

[Cjcycles]

I’ve used one of those little digital torque meters you connect like an extension. Checked a few of my torque wrenches on the snap on truck. Then compared with the little digital meter and got the exact same results. Your mileage may vary, but it’s a cheap solution to spot check them.


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[kbuhagiar]

I’ve used one of those little digital torque meters you connect like an extension. Checked a few of my torque wrenches on the snap on truck. Then compared with the little digital meter and got the exact same results. Your mileage may vary, but it’s a cheap solution to spot check them.

This.

It's worked for me for the last ten years or so.

 

[visionguru]

With having a torque wrench addiction, it's getting expensive to send off my wrenches for calibration just to find out they are still within spec.

I was wondering if anyone has used one of these:

https://www.nationaltoolwarehouse.c...MIsPrmi9TL6QIVUL7ACh2fHgFNEAQYAyABEgLfUfD_BwE

This:

https://www.harborfreight.com/12-in-Drive-Digital-Torque-Adapter-63917.html

The tester in your picture is old junk. Digital is the way to go.

 

[zippster]

I have one of those Quinn units. Read good things about them and some guy on youtube tested one that came in under 2% spec. Mine however is 12 percent off. Anyone know if these can be re calibrated?

 

[ddawg16]

I'm a cheap *******.......and I like physical standards.

If checking temp accuracy? Make an ice bath and boil some water. 32-212 deg's F...compensate for altitude....it's about as accurate as you can get.

Torque? Clamp the head in a vise....hang a weight off the handle at exactly 1'....or 2' if you have a big *** wrench. Key point here is accurate weight. An easy way to take a small 'known' weight and check a high range is to use a long pipe and slide it on the handle. A 10' pipe would take a 10 lb weight and make it a 100 lb weight on the torque wrench.

If you don't have an accurate 10 lb weight? Get an accurate measuring cup.....a gallon of water weighs 8.34 lbs. At 10' from the center, 83.4 ft lbs.....

I love math.......until tax time

 

[jessesandy]

Also, when hanging weights from a torque wrench handle, the handle must be parallel to the floor to make the test accurate. Imagine hanging a weight on a handle that was pointing down, the wrench would see very little "rotation" at the business end.

 

[ddawg16]

Also, when hanging weights from a torque wrench handle, the handle must be parallel to the floor to make the test accurate. Imagine hanging a weight on a handle that was pointing down, the wrench would see very little "rotation" at the business end.

Thank you for pointing that out.....its a very important point.....I should have stated it

 

[seber]

When hanging weights on a torque wrench you need to figure in the added weight of the wrench itself. I used load cells in some of my engineering designs. They can be accurate but the ones I consider good enough for a torque wrench would certainly not sell for the price of that HF unit. I'd much sooner trust the mechanical one in the original post.

 

[visionguru]

I have one of those Quinn units. Read good things about them and some guy on youtube tested one that came in under 2% spec. Mine however is 12 percent off. Anyone know if these can be re calibrated?

How do you know it's 12% off? A strain gauge (torque sensor) is used in those digital torque adapters (wrenches). That much error indicates QC issue, no easy way to be recalibrated, except replacing the sensor.

I'd buy a new one from Harbor Freight and return the old one, because you were sold a defective unit.

I have a Powerbuilt unit. It agrees with 3 of my Snap On Techangle wrenches, very accurate.

 

[chipjumper]

I’ve always done the digital luggage scale check by putting the torque wrench in a vice and pulling on the handle at 12” or a marked point then doing the math. Obviously I can’t quite pull 100lbs with my little fingers but it’s accurate for the <50 lbs.

 

[SeisMec]

Key point here is accurate weight. An easy way to take a small 'known' weight and check a high range is to use a long pipe and slide it on the handle. A 10' pipe would take a 10 lb weight and make it a 100 lb weight on the torque wrench.

If you don't have an accurate 10 lb weight? Get an accurate measuring cup.....a gallon of water weighs 8.34 lbs. At 10' from the center, 83.4 ft lbs.....

I love math.......until tax time

You are assuming the 10 foot pipe weighs nothing.

 

[Noworries]

I keep an old craftsman beam torque wrench around for a quick check

 

[lardy1]

I've got a variation of that cheapo torque adapter. If I check it against a beam type torque wrench, it's as accurate as my pull. I test my click type torque wrenches against both and have always been where I wanted to be.

 

[Mgdoug3]

I use a beam style torque wrench to test against my other torque wrenches. I used an Allen socket on one and the corresponding hex socket on the other.