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[quote=”DaveNewbie” post=154509]I have seen posts – rumors? – of folks who sent their wrenches back to Snapon or brought it to a truck and the guy re-calibrated it. It was implied that the Snapon Warranty/Guaranty is to the tool – not the owner like everything else.
I’d be real curious to know if that was true.[/quote]
I doubt they would calibrate it for free even under warranty. Plus, the warranty details on their website now state that warranties are only good for the original owner.
[quote=”Hanneman” post=154524]An alternative calibration method is to create a table or graph of the measured torque versus the dial setting on the torque wrench. For example, record 5 measurements from the digital adapter at each torque setting on the wrench, and calculate the average. Then, repeat the measurement for 10 or more commonly-used settings along the full scale of the wrench.
It doesn’t require disassembly, but you have to refer to the calibration table/plot each time the wrench is used, which may be a PITA if the wrench is used often. Also, the clicker style wrenches have the best accuracy at the highest setting, and the accuracy decreases as the setting is lowered. The digital wrenches have a fairly constant accuracy over their specified torque range. So, you obtain a better feel for the accuracy (and expected variation) for different settings and learn each wrench’s character.[/quote]
I’d really like to figure out how to calibrate it. Not just to make it more usable, but to know how this one works.
I finally got to take my own pic. There is a grub screw on the lock ring thingy. It’s the only screw on the shaft or handle.
Sorry if it is bad form to reply to such an old thread. First off, thanks for the great tips on calibration. I just picked up the $30 HF adapter and am looking forward to calibrating my cheap Craftsman wrench.
I would also like to calibrate my Dad’s old Snap On, model QJR3200C, but I can’t find any information about how to do it. Anyone know how to calibrate this one?
