Cam out Cam out (also cam-out or camming out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. Repeatedly camming out damages the screw, and possibly also the screwdriver, and should norm…

I’ll second that. They suck. Torx head screws with a torque limiting driver is the way to go.

[image] SappaCreek: It’s more of a “hey, isn’t it neat that they cam out?” That’s what I was thinking after poking around a bit on Wikipedia.

It’s not neat. Torx or star drive is the way to go. Just finished setting/replacing/repairing a few fence posts and panels… If camming out on purpose is true, a shitty idea for the general public. Only phillips head screws I buy are for drywall. Best tool in my box is a cordless 1/4 drive Dewalt i…

Anybody run into JSA standard phillips head screws. They are guaranteed to round out if you use a standard SAE screw driver. If you ever wondered why mostly electronics components you can never find a screwdriver that fits this is it.

Back in the 70’s I bought a CL90 while in Yokohama. Learned the hard way. But not a big deal as long as you grind the tip off the Phillips driver. https://www.motorcycle.com/ask-mo-anything/difference-between-japanese-jis-phillips.html

In all the years I’ve used them I never knew I was using a Robertson screw [IMG_0003]

If I come across a phillips screw I usually bin it and replace it with pozidriv, interesting video about screws: [Why are Pozidriv screws better than Phillips?]

Interesting and informational, left out star drive though. Must buy good quality bits.

Were Phillips screwdrivers designed to "cam-out"?

Scuttlebutt

KPChief December 31, 2020, 6:30pm 9

From “One Good Turn - A natural history of the screwdriver and the screw” by Witold Rybczynski.

Topic		Replies	Views
Thread lubricant and torque values Marine Engineering	16	2988	February 17, 2017
Lack of new threads? Engineering	51	3900	August 25, 2021
Metric vs Imperial systems Scuttlebutt	61	3843	June 28, 2023
What is stopping you? Metric, again Scuttlebutt	191	4736	June 1, 2024
Did YOU Ever Notice? Engineering	61	7605	February 3, 2013

Were Phillips screwdrivers designed to "cam-out"?

Related topics