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Author: deajohn5556
Time: 04/30/10 20:10 PST
This is a reply to message no. 21081 by skydivetaurus
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Formula for calculating the pull-out force of a screw from wood

I would estimate the pullout force as

 

P = (PI)DtS/2   where PI = 3.14; D = screw diameter; t = engagement length;  and S = shear strength of wood which is around 500 psi, up to 800 psi for hardwoods.  Yoou may want taodd a safety factor of 2 or more to be sure.

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Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.