June 19, 2019

DC fastening calibration

The specific calibration for each tool is set by comparing the internal and external torque indicators which are indicated on a tool controller readout. 30 sample readings are taken to ensure that the tool’s internal and external readings are consistently in agreement. The calibration factor is affected by the transducer gauge, the gear ratios in the tool, and the efficiency of the gears. It is the change in gear efficiency throughout the life of the tool that will have the greatest effect on the specific calibration factor value. Often the gears will become more efficient after some use and then near the end of their life, the efficiency will begin to decrease.

Once the tool has been put into service, torque calibration should be validated and adjusted at regular intervals, either time-based or cycle-based. A variation greater than the values for new tools is expected and does not necessarily mean a transducer is defective. To allow for normal wear and associated efficiency changes, we recommend setting a limit from the nominal torque calibration value.

Tami Matthews
Author: Tami Matthews
Tami Matthews is the Director of Marketing at Elevated Industrial Solutions. She’s spent 20+ years in marketing, focusing on writing, public relations, digital marketing, and content marketing. Before coming to Elevated in December 2020, she worked for a number of high-tech companies. Writing is one of her favorite pastimes. In her spare time, she volunteers for a number of causes including the Kunsmiller Creative Arts Academy working on the PTO. She also hikes with her husband and begrudging daughter.
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