Quick Work Wrench

Problem: Analysis was needed to determine weak points in a wrench design which would allow Main Corporation to make changes needed to meet American National Standards Institute (ANSI) standards for strength and life requirements for socket wrenches.

quickwork.jpg (38056 bytes)Solution: Main Corporation designed a new socket wrench that performs low- torque bolt spin-offs and spin-ons as well as high torque loosening and tightening for USAF quick change maintenance. Air Force Research Laboratory Air Vehicles Directorate (AFRL/VA) engineers tested a prototype for strength and found it met all ANSI standards. The engineers also tested production prototypes which indicated they met the minimums.

The wrench has a center shaft inside a hollow handle that allows one to turn loose nuts without moving the handle. This wrench allows one to loosen tight nuts in the traditional crank and ratchet way, and extract loose nuts, turning the center shaft. Automobile mechanics and plumbers find it ideal for tight spaces. Drivers and homeowner's find it ideal for "clean hands, clean clothes" operation.


  • Society benefits from a quick "clean hands" wrench that can extract nuts from tight spaces.
  • Main Corporation benefits by getting a wrench design that meets ANSI requirements for wrenches sold in the USA.
  • The USAF benefits from the validation of structural design and analysis methods developed by AFRL/VA and applied to the design of the wrench.
  • AFRL/VA benefits by earning a royalty on the licensing of these improvements to Main Corporation.
  • The Air Force also benefits from using this wrench in its maintenance work.

Current Status:

  • The original design was analyzed and found too weak for the ANSI requirements for that size wrench.
  • AFRL/VA proposed and tested alternate designs that were strong enough to meet ANSI.
  • WTN also helped getting prototypes built within Main Corporation's price targets.
  • Main Corporation is still iterating designs trading off aesthetics and strength.
If you have any questions about this Cooperative Research and Development Agreement or are interested in getting more information about technology transfer and CRADA projects, please contact Jim Singer at Wright Technology Network (937) 253-0217 or CRADA@wtn.org

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