Tuesday, March 14, 2017

Wright4478 torque wrench calibration

Last week I calibrated my Wright Tool torque wrench. Simple, yet time consuming process using the digital Snap-On torque meter. It involved removing the jam nut holding the micrometer handle, removing handle and threading the threaded rod further into torque wrench body, then reassembled handle and jam nut. This process was to be repeated for each adjustment, with torque wrench at lowest setting. Calibration was done at 1/2 range on wrench, 125ft/lb in this case. Once I got the torque wrench within +/- 1ft/lb at 125, I checked at 200 and 75 as well. 

What I learned was calibration of a micrometer style torque wrench requires patience and attention to detail.










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