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List of screw drives

en.wikipedia.org

191–200 of 263 posts

Re: List of screw drives

#191
post #7

Do you find yourself stripping Phillips head acres frequently? That is because you are confusing Phillips and Pozidriv heads. They look similar but have a different head and different amount of engagement. I just bought myself some Wiha drivers after years of using shitty tools. I am so much happier now.

It still seems like it would be difficult to know WHICH type of screw you're dealing with, even if you have the right tools.

Re: List of screw drives

#192
post #113

Earlier quoted context omitted.

An advantage of flathead is that it is easy to unfoul the screw head. A minute with a utility knife or a flathead screwdriver will clear the channel of dirt or paint. I would not want to deal with a torx that has several layers of paint dried into it.

Break out the drill and drill a tiny hole down the centre to crack the screw. Now pull it out and can put in a new clean one.

Using a reverse drill (if you have one) might also be helpful

The drill will bite into the screw and start unscrewing it

Re: List of screw drives

#193
post #33

Earlier quoted context omitted.

It's unfortunate that Ikea doesn't seem to publicize this or provide drive heads with their furniture (AFAIR). I was glad I picked some up before I did a kitchen with Ikea cabinets. It saved me a lot of grief.

I don't think they provide it with their kitchen elements, but for all furniture they provide a hex key for assembly and assume that you have a screw driver yourself.

Assume you have a posidrive screwdriver, which you probably don't. That was the point of this thread.

Re: List of screw drives

#194

When my wife and I bought our house, I thought the previous owner had stripped the hell out of some Phillips screws... then I learned what Robertson (square) screws were. After getting the proper bit though, I’ve started to really appreciate them. I don’t think I’ve ever stripped a single one.

Ha I just finished banging out an impassioned comment about how much I appreciate Robertsons compared to terrible, stripped-out Phillips. And don't tell me they were Pozidriv. I've known about that difference for a long time. They're still trash.

I have half a mind that they invented Pozidriv just to have a defense for how terrible the Phillips fastener is.

Re: List of screw drives

#195
post #187

Earlier quoted context omitted.

Robertson is excellent but they seem to be a uniquely Canadian phenomenon. My company ships robots to the US in big crates, and we've had to switch to building them with Philips screws instead because of issues with local availability.

Robertson (Square) drive are also gaining popularity in building decking applications in the U.S. I've seen quite a few options in Home Depot / Lowes stores in the Northeast. One of reasons they are less popular than Philips is the price as square drives are a little bit more expensive and tend to be offered at premium brand screws.

Furniture-making often uses them as well. We're slowly coming around to the light.

Re: List of screw drives

#196

Important FYI for any Americans who don't know: Ikea screws are not Phillips, they're actually Pozidriv , which is different enough to matter. Do not use a Phillips screwdriver to assemble Ikea furnature, as that combination will easily cam out and ruin the (typically soft metal) screw. It's easiest to buy the correct Pozidriv screwdriver bits from Ikea, but they're also available online. My understanding is that Poz…

Ikea sells a $8 tool set that includes three sizes of Pozidriv bits - and other bits that perfectly fit their various connectors. It's well worth the cost if you're planning to assemble anything you got from IKEA and not lose your mind.

Re: List of screw drives

#197
post #188

Earlier quoted context omitted.

> Even flat head is better than those pieces of junk. I would argue that flat head is the worst. They are not designed to be used with power tools.

Phillips isn't properly designed for power or hand tools. If it strips with a screwdriver, it's definitely going to strip with a drill. I've rarely seen power-driven Phillips screws that didn't have some sign of stripping, even using torque limiters and even on things fresh from the factory. At least flat head takes uneven torque from hand tools well. It also allows improvised tools to be used in the field. If I'm wo…

I am not arguing for Philips. But flat head has 2 less contact surfaces so definitely even more easily to cam-out.

Re: List of screw drives

#198
post #187

Earlier quoted context omitted.

Robertson (Square) drive are also gaining popularity in building decking applications in the U.S. I've seen quite a few options in Home Depot / Lowes stores in the Northeast. One of reasons they are less popular than Philips is the price as square drives are a little bit more expensive and tend to be offered at premium brand screws.

Furniture-making often uses them as well. We're slowly coming around to the light.

Torx (star) drive screws too.

Re: List of screw drives

#199
post #129
post #73

As far as I'm concerned, torx is the only reasonable screw anymore. It seems like most construction screws (at least in the US) have moved to this. Just to make the point: I've stripped out more torx drivers than I have torx heads. I can say I truly don't understand how phillips ever even took hold over flatheads. Cheap phillips head screws seem designed to strip out. Somebody elsewhere in this thread made the point…

>I can say I truly don't understand how phillips ever even took hold over flatheads. Cheap phillips head screws seem designed to strip out. It's not cheap ones; Phillips heads were designed to strip out. It's the very reason they're used. The whole idea was to use them in factory assembly, so that workers wouldn't overtorque them. You put them in and tighten, and when they cam out, you're done. If you want a fastener…

If you design a feature and it doesn't work, you don't get credit for the design. Who wants a screw that will self-destruct when it is correctly torqued? Which, by the way, is a value that widely varies and you can't just design one screw head to limit torque for every situation.

I've had Phillips over-torque and eat threads. I've had them strip to a raw steel crater long before the head even meets the surface it's being screwed into.

Definitely agree that Phillips is obsolete. God I hate them. I may have a problem. I've worked on a lot of old engines in my life and seeing a torn-out cross is like a big middle finger from the previous person who worked on it, usually the manufacturer. An engine is something that deserves an easily removed fastener that is applied with a torque wrench. Who knows how many newton-meters a Phillips head takes before it cams? Does anybody? Probably a huge range.

Re: List of screw drives

#200
post #140

Earlier quoted context omitted.

It only takes a small number of cam-outs before it's stripping out.

Only if the fastener has mechanical properties on the order of butter.

Ah yes I prefer my screws to be made of a hard cheese myself, something along the lines of parmesan.
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