When torque loading, a wrench should be selected where the required value falls
- at the top end of the range.
- in the middle of the range.
- at the bottom end of the range.
Explanation from PART66Online
Torque wrench accuracy is quoted as a percentage of the reading, and the tool is calibrated over a stated range that stops well short of zero, so a wrench is chosen with the required value near the middle. A setting at the bottom can fall below the band the tool is qualified for at all; one at the top leaves the mechanism at its limit with no margin for overshoot. Either invites an under- or over-tightened fastener.
N
nazzoo asked · 18 Mar 2013
should torque be mid range?
Community Comments (1)
T
trap2307
21 Mar 2013
Hello!
caa.co.uk/docs/33/CAP562RFS.pdf
page 763
4.5.1) Values of torque within the first quarter of the wrench scale may be difficult to read
accurately, and some manufacturers specify that the torque wrench selected for a
particular use should have a range such that the specified torque falls within the upper
range of the scale.
caa.co.uk/docs/33/CAP562RFS.pdf
page 763
4.5.1) Values of torque within the first quarter of the wrench scale may be difficult to read
accurately, and some manufacturers specify that the torque wrench selected for a
particular use should have a range such that the specified torque falls within the upper
range of the scale.
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