3 ms·
This article doesn't get into the reason why Phillips and Robertson are tapered and prone to camming out: they were designed that way to prevent too much torque
by shawnz 4y ago
This article doesn't get into the reason why Phillips and Robertson are tapered and prone to camming out: they were designed that way to prevent too much torque from being applied when tightening by hand.
- masklinn 4y agoNeither parts of the statement is true for Philips: the Philips screws were borne out of a better compatibility with powered tools, and while the cam out properties have long been claimed as a torque limiter (generally in the context of assembling aluminum aircrafts before powered tools had good torque limiting), that was not part of the original 1932 patent. A later 1949 patent / refinement does make claims on that front, but those are mostly in terms of limiting damage to the screw IIRC.