Transcription of Lab Test Procedure for Determining Stated Relative Torque ...
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Lab Test Procedure for Determining Stated Relative Torque ...
Revised 10/10 PTI LAB TEST Procedure FOR Determining Stated Relative Torque MEASUREMENT FOR CORDED AND CORDLESS DRILLS, DRILL/DRIVERS, AND SCREWDRIVERS PURPOSE The purpose of this document is to define a common method for measuring a Relative output Torque . SCOPE This Procedure applies to all corded and cordless drills, drill/drivers, and screwdrivers not intended for assembly/production use. It does not apply to products employing impacting devices such as hammer drills, rotary hammers and impact drivers. The Relative Torque Measurement (RTM) determined in accordance with this document represents the output Torque developed by the product under test with a 95% confidence.
Revised–10/10 4.3 Calculations Background: The following statistical analysis of the recorded data serves as a method to determine the RTM of the tool with a 95% confidence. 4.3.1 Once all twenty-five trials have been completed, the average torque value of the trials, the standard deviation for the trials, and the high and low data point limits shall be
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