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Torx is only good if your screw is non rusting it rounds off too fast with almost any sign of rust.
Torx kinda requires it be made of a decent alloy, it was developed to handle situations where you really really need torque. Handling more force than anything else was the guiding principle of its design.
Hence you find it in places such as bicycle disc brake rotor mounts.
Agreed i strip so, so many philps and hex screws. Although the combination screw has saved my ass, when shit hits the fan and i striped philps. I get bertha THE BAG ASS FLATHEAD
had to dremel one of my laptop's (stripped) philip head screws to use a flat head screwdriver on it
it worked, somehow
Hex should be B teir. Pozi should be C, it's very common in the UK for low torque applications. But it looks deceptively similar to Phillips.
Hex could even be A tier except...
- 10 million metric sizes
- 10 million imperial sizes
- heads get full of rust or dirt
- note that this makes it even harder to tell which damn size they are
- usually mild steel so they strip, especially when it turns out you're using imperial in metric and vice versa
Too many years of wrenching on old equipment has soured me on all except for the good old fashioned hex bolt (S tier) and Robertson (A tier).
Even slotted beats most of these if the steel is decent, scrape out the rust and whack it with an impact screwdriver. I've turned many torx and hex in particular into slotted over the years.
External/male hex aka what big bolts have that you use a wrench for are A tier. I can't really think of a more effective way to transfer large amounts of torque to a bolt or nut. Female hex aka Allens are low C or high D tier. They would rate higher, but they're made in 8.23*10^19 sizes, and the correct one nearly never falls to hand. Add to that the tendency for allen wrenches to be made of low quality extruded hex stock and you've got an excellent recipe for an unpleasant fastening experience.
I feel like you didn't give enough credit to slotted and combo (& hex but others have said that). Being able to be removed with a quarter or other coin is incredibly useful in applications where access to screwdrivers isn't a given.
Yeah, combo is where it's at in terms of field serviceability. I pretty much always have a flathead on hand, but very rarely have a torx but set, Allen key, or Robertson close at hand if I'm in the field.
I prefer flat over Philips imo, phillips very easy to strip
I'm a technician and keep my 9 most-used screwdriver bits in its handle and all of these are usually fine for most applications... Except the slotted screw! I literally get annoyed every single time I have to use one, it always slips out and it's significantly slower to screw/unscrew anything. Also, I only want to carry one, but if I use one wide enough to minimize slipping, it's usually too thick to fit in the slot! "Screw" you, flathead screws and the $0.0001 you save with each one...
Here's what I use most often (not necessarily in order):
- big Phillips
- small Phillips
- T25 Torx
- T20 Torx
- T15 Torx
- T10 Torx
- big security hex (hole in the middle)
- small security hex (hole in the middle)
- slot flathead
Torx >
This is correct, Torx is easily the best standard. Robertson is an acceptable second.
Posidriv can bugger off too.
When you look at a Robertson, or a JIS or even a Phillips you just use a JIS or Robertson and you’re fine. If it is posidriv, you must use posidriv and you can’t use posidriv with a conventional Robertson/Phillips/JIS. The only way you can tell the difference is by a teeny-tiny little dot on the screwhead or some extra minuscule fins on the driver. If you do t have your glasses, or aren’t aware, you will damage the screw and your driver.
Hex and Torx are OK for certain things where you don’t want an ignorant pleb to gain access. Security Hex and Security Torx are OK where you don’t want an ignorant pleb in denial of their ignorance to gain access.
All those other drivers, Triwing, Pentalobe, variants of Posidriv are just there to push proprietary applications and should not be used by anyone.
Robertson is top tier too
Me out here calling them “plus head” and “minus head” like a neanderthal
omg I've found my people, you all have strong opinions on screw driver geometry
Might I recommend a book on the matter.
One Good Turn: A Natural History of the Screwdriver and the Screw by Witold Rybczynski
I fucking hate Phillips style so much.
Never tried JIS though, Robertson is where it's at.
Do you have a moment to talk about our Lord and Savior Torxus Christ?
Found the Canadian
90% of complaints about any screw head type is some jackass using the wrong driver like a P2 in a P3 head totally mystified as to why their shit stripped.
That's not just user error, though. Phillips also makes it easy to use an undersized driver, and people will grab whatever they have handy. Torx doesn't have that problem, but at the expense of needing a bunch of different drivers for different screws.
Well, don't forget that a philips head screw was designed to slip. It was designed as a poor man's torque-controlled screw. This is really part of the problem. If you use hardened steel drivers and screws this is not a problem but often it's pretty low quality and the slipping will cause damage to the head and driver.
I prefer torx for this reason. But most of the screws I use I don't pick, because I do a lot of repair work.
Phillips was not designed to cam out. It cams out so people started saying it was designed to cam out.
Phillips was designed to reduce cam out, which it does, compared to slotted.
Yep, it reduces cam-out. Not very well, but it does better than a slotted screw made by a drunk apprentice with a dremel being torqued with a flat-head prybar. Torx, Allen, and Robertson all reduce cam-out far more, but Phillips still sadly get used in new products.
I'm trying to understand what the top half of each diagram is
The tip of a screwdriver
Why does it look like a clam shell
You're seeing the cutouts that bite the screw, and you're reading them as being 3d arcs that extend back. Instead, follow the two vertical lines representing the main shafts downward, and look at the whitespace between the shells as the bits of the cross that poke out, and the "shells" as the grooves in the shaft forming the cross.
Taco
All that lame stuff. Torx it is.
Phillips is just common in consumer goods as it's designed to cam out when over torqued by the average joe. Better to have it stripped but tight than a broken head.
Still sucks balls when you know what you are doing though.
It's not designed to cam out. It was supposed to be a quicker alternative to slotted. It cammed out a lot, people then claimed it was a feature.
Screw you
Pozidriv > *
Not only is it self-centering like phillips and JIS (eg the reason they are used in so many line-assembled manufactured goods) but it's has superior contact like a Robertson (square drive) or hex or torx.