5/11/2009
HEADLINES
IFI Adds Thread Engagement Calculation Feature
The Industrial Fasteners Institute added three pull-down menus to its IFI Technology Connection to answer engineer and customer questions about thread engagement, director of engineering technology Joe Greenslade announced.
The formula for thread engagement for full bolt strength is in the 7th edition of the IFI Book, but the pull-down menus make answering quicker, Greenslade explained. “Select thread size, bolt grade or property class and mating material. Press submit and the answer appears immediately,” Greenslade pointed out. The output is the minimum length of thread engagement needed to assure that the bolt will break before the threads will strip.
All of the standard screw and bolt grades are listed plus about 20 types and strengths of mating materials.
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