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.

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Were Phillips screwdrivers designed to "cam-out"?

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