getting set to build a new motor, to improve the robustness of the process I like to
check the torque wrenches,,,the basic formula is Torque ft lb = weight x distance inches
here is a post on one way to do that
https://www.wikihow.com/Calibrate-a-Torque-Wrench
I took my weights to the local UPS Store and
weighted them on their certified scale. I did that on a Tuesday morning
not busy time, after I mailed a couple of packages and asked the attendant who
I was working with for an OK to do that,,,
For my weight set, I had one ten pound weight that was true, others were short by
.45 to .5 lb,, 10 pounders and 2.5 weights were off by a similar ratio.
for me
250 ft lb click wrench reads 7 ft lb low at 80 lbs
150 ft lb beam wrench was maybe 1 ft lb low at 80lbs however the scale is really compressed, not a lot of resolution.
600 in lb scale wrench was 12 inch lb high at 400 inch lb
30 inch lb scale wrench was 1.25 inch lb high at 20 inch lb
so there is some variation among the wrenches
,that is why I snug fastners tight with the appropriate scale or click wrench
and then use the beam wrench for the final set.
Keep in mind that the beam wrench scale has less resolution, and one needs to be able to read the
scale-beam from a zero angle, to be accurate with poor resolution.
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