Direct Calibration Chain for Hand Torque Screwdrivers from the National Torque Standard

Authors

  • Koji Ogushi National Metrology Institute of Japan, AIST
  • Atsuhiro Nishino National Metrology Institute of Japan, AIST
  • Koji Maeda National Metrology Institute of Japan, AIST
  • Kazunaga Ueda National Metrology Institute of Japan, AIST

DOI:

https://doi.org/10.21014/acta_imeko.v4i2.226

Abstract

Hand torque screwdrivers are used for the fastening control of screws in almost all precise mechanical and electrical parts. This paper describes the realization of a direct calibration chain for hand torque screwdrivers traceable to the national torque standard. The calibration methods for a reference torque screwdriver using a primary torque standard machine, a torque screwdriver tester using the reference torque screwdriver, and hand torque screwdrivers using the torque screwdriver tester are described respectively. Uncertainty evaluation methods for each calibration level are also explained. The effectiveness of the calibration chain for hand torque screwdrivers could be demonstrated.

Author Biography

Koji Ogushi, National Metrology Institute of Japan, AIST

Senior Researcher, Mass and Force Standards Section,

Mechanical Metrology Division,

Ph.D

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Published

2015-06-29

Issue

Vol. 4 No. 2 (2015)

Section

Research Papers

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