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List of screw drives

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Re: List of screw drives

#201

Post by vertexFarm »

joshu wrote: 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.

Ah, I must be using the wrong driver then. Oh wait, nope, it's stripping because it's just inherently inferior. Sorry, you always see people pointing out the existence of Pozidriv, but it really makes little difference. They both strip like you've tucked a hundred in their thong.

Re: List of screw drives

#202

Post by telchar »

rconti wrote: post #193
hvidgaard wrote: post #111

Earlier quoted context omitted.

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.

Exactly so, 99% of people have never heard of posidriv and don't have the bits, or don't know they have the bits. I couldn't find anywhere in instructions or the website where Ikea mentions that you should use them, but sure enough every screw used posidriv.

Re: List of screw drives

#203

Post by vertexFarm »

magduf wrote: post #134
stephen_g wrote: post #19

Earlier quoted context omitted.

I’ve mainly had the problem when getting them out. Especially when the application requires thread locking compound and has been out in the field for a few months or years - even when they had been properly torqued with a torque wrench. We abandoned Phillips and Pozidriv completely and went to Torx for the screws (we were already using hex for bolts). Haven’t really had any issues stripping out screws since.

>I’ve mainly had the problem when getting them out. Yeah, that's your problem right there. Removing an old Phillips screw will take more (usually much more) torque than it took to install it, so it'll cam out. The problem is that you're trying to get them out. Don't do that. Phillips screws were never designed for removal that way. They were meant to be used for installation only, and to limit torque on installation.…

He's correct about this. Phillips was an early attempt at a one-way fastener. Doesn't mean the manufacturer isn't a dick for using them.

If you're working on something really important, like auto mechanics or the like, consider buying new fasteners when you reach re-assembly. Those old stretched bolts probably need to be freshened up anyway.

Re: List of screw drives

#205

Post by bagels »

jammi wrote: post #61
bagels wrote: post #34

Earlier quoted context omitted.

I wish auto manufacturers knew this.

They do. Cars are engineered to fail and some models are sold even at loss to get the profit from OEM parts and service. This is also often the reason why seemingly similar parts are incompatible from one model to the next; the manufacturers are racing against the (often much more durable) aftermarket parts. If they were in the business of making cars great for the consumers, they'd engineer them strong with grease f…

Maybe it's that they don't care. Last transmission I rebuilt (following.factory service manual) had a Phillips fastener with threadlock on it that required destructive removal after careful use of a manual impact driver. Replaced it with a threadlocked Allen fastener.

Re: List of screw drives

#207

Post by chris_wot »

slededit wrote: post #24
chris_wot wrote: post #21

Earlier quoted context omitted.

The article states that there is no evidence for this being part of the design.

It is mentioned in later patents, and regardless it is a specific part of the tool's behavior. Its continued use is based upon this fact.

Yup, article says that too. But it wasn’t originally by design.

Re: List of screw drives

#208

Post by germinalphrase »

jammi wrote: post #88
Cthulhu_ wrote: post #71

Earlier quoted context omitted.

And yet, cars still last for two decades or more if maintained properly, and are IMO some of the most reliable pieces of gear out there - I'm finding newer models to be better in that regard than older ones (but maybe that's bias on my side, I haven't driven older cars in a while now)

Yes, if maintained properly, which means swapping out these engineered to fail parts every so often, which becomes uneconomical at least in the resale sense at some point in time, because the repaired car resale value is less than the cost of repair. For instance on VAG cars, the designed to fail cash-cow parts are typically the various suspension bushings. Once such a part is worn out, resulting in a part that has e…

And advice on identifying such cash-cow parts? My vehicle repair knowledge is limited.

Re: List of screw drives

#209

Post by kps »

simonbarker87 wrote: post #189
nsxwolf wrote: post #179

Earlier quoted context omitted.

Amazing that this has never met my attention. Why doesn't IKEA make this more clear?

Probably because there are little marks on the top of each pozidrive screws that indicate it is different. The don’t explain it in Europe either, it’s just a thing you should notice and account for when building stuff. I would put identifying pozidrive vs Phillips in the same camp as just knowing how to use a screw driver but perhaps I’m being harsh

Parochialism-induced harshness — what could go wrong? POZIDRIV® bits are practically unheard of here (Canada); you have to go out of your way to find them, on the level of triwing or pentalobe, or JIS.

Re: List of screw drives

#210

Post by grmarcil »

simonbarker87 wrote: post #189
nsxwolf wrote: post #179

Earlier quoted context omitted.

Amazing that this has never met my attention. Why doesn't IKEA make this more clear?

Probably because there are little marks on the top of each pozidrive screws that indicate it is different. The don’t explain it in Europe either, it’s just a thing you should notice and account for when building stuff. I would put identifying pozidrive vs Phillips in the same camp as just knowing how to use a screw driver but perhaps I’m being harsh

I think from your comment you may be from Europe, so in that case for added context, you may be underestimating how uncommon Pozidriv screws and screwdrivers are in the United States. I have never seen a Pozidriv screw on any manufactured product other than Ikea furniture in the US. You cannot buy Pozidriv screws or drivers at major hardware stores (try searching "Pozidriv" on Lowes, Home Depot, or Ace Hardware), with the exception of one or two drivers that are in stock online only.

So consider that this is an extremely rare fastener format in the US market, and which looks almost identical to Phillips (the most common US screwdriver). I think many people like myself who are interested in tools and hardware are aware of Pozidriv and can identify it easily, but I can completely see why the average US consumer mistakes it for Phillips.

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