When a Phillips Is Not a Phillips!

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Terms

Camout (or cam-out) is a course of by which a screwdriver slips out of the top of a screw being pushed as soon as the torque required to show the screw exceeds a specific amount. Frequently, camout damages the screw, and probably additionally the screwdriver, and may usually be prevented. However, the Phillips head screw and screwdriver mixture was designed particularly to cam out, as on the time of its invention torque sensing automated screwdrivers didn’t exist.

Phillips is a trademark used for a screw with a head having two intersecting perpendicular slots and for a screwdriver with a tip formed to suit into these slots.

Recess refers back to the formed socket into which a driver may be inserted

End-Load is the power required to maintain the bit to not camout. Low end-load is often most fascinating.

References

History of Screws and Screwdrivers, by Mary Bellis, About.com

Phillips Screw Company; www.phillips-screw.com

Phillips or Pozidriv? Healey Magazine, Feb 1996

Semblex Corporation; www.semblex.com

Why did this man Phillips assume we wanted a brand new kind of screw? by Adams, Nov 24 1989

Assembly Technology Buyer’s Guide, Wheeling, IL, Hitchcock Publishing, annual.

Collections Canada; www.collectionscanada.gc.ca/cool/002027-150-e…

A New Design of Screw Head by Brian Rooks, Assembly Automation Vol 21-Four, 2001

Furniture screws: primitive to gimlet by Fred Taylor, Discover Mid-America – Aug 2007

S.C.F. Fasteners, Taiwan; www.scffastener.com/fundamental/merchandise/specialS.html

Robertson Screws by Ricketts, www.mysteriesofcanada.com/Ontario/robertson_screws

www.thestuccocompany.com/upkeep/Phillips-vs-roberts-138476- by Chris Lewis

Hands-On: LOX Screws by Chuck Cage; www.toolmonger.com

http://scholar.lib.vt.edu/theses/available/etd-42698-205111/unrestricted/chapter_2.pdf

http://www.emeraldinsight.com/10.1108/01445150110407322

Uni-Screw Worldwide, Inc; www.uniscrewworld.com

Discussion Groups;

Google Answers Researcher by Tutuzdad ?, Jun 10 2004

Re: star vs sq. drive; http//boards.jlconline.com/boards dave_k Veteran Contributor

http://boards.fool.co.uk/Message.asp?mid=11161184&sort=whole; Julian F. G. W.

http://www.electronicspoint.com/torx-hex-star-bits-t39076.html; Fred Abse

Instructables suggestions of article by contributor ironsmiter

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