NSXSOON said:
Both the torque wrenches you are considering are “tension spring” designs that are inexpensive but have an inherent flaw. If you ever forget to take the indexing setting back to “0” before returning it to your tool box the next time you go to use it and from then on your calibration/accuracy will be compromised. You will then need to get the wrench re calibrated or replace it.
I’d strongly suggest buying a Snap On Torque-O-Meter since there design not only is more accurate and for a longer period it also does not need to be returned to “0” before storing it away. This is one reason the aerospace industry uses these almost exclusively.
I work for a major airline in their home maintenance base. We have all kinds of torque wrenches available to us. Depending on what we need is what we use. As far as returning clickers to zero torque setting, this is something that is the "norm" that everyone does at work. The wrenches get used so often that even if it were left set at a torque, it wouldn't stay that way more than a day or so.
We have Proto clickers (now going on 10 to 12 years old), Cornwell clickers (15 to 20 year old units), Sturtevant-Richmont clickers and beam type (the clickers are the newest we have) and a mixture of others such as Snap-on dial type, and other odd brands acquired at one time. We also have a few electronic-digital units.
The guy who calibrates all of these for our company tells me the Sturtevant-Richmont are the most accurate we have and also the best to calibrate as he can remove even non-linear errors with them (not possible with most others). SR units are, however, one way torquing, and do not work at all in reverse. Good reason to have the removable head type, so you can reverse the head. Ocassionally I have to torque something using an offset adapter with the torque wrench on the adapter backwards (I'm torquing a right hand thread part, but the wrench is going left to do it). These SR wrenches are about all they are buying at the current time.
www.srtorque.com
Charles
