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List of screw drives

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Re: List of screw drives

#241

Post by mattmaroon »

simonbarker87 wrote: post #173
mattmaroon wrote: post #122

Earlier quoted context omitted.

Square heads are also acceptable. Kreg uses them for pocket hole screws and I like how easy it is to get the bit in when you're in a tight spot. They resist cam out pretty well also, I've not yet had a screw of either type I couldn't easily remove. A good flat head screw is better than a crappy Phillips but a bad one is worse. The bad ones seem to strip by design.

My issue with kreg is that the driver isn’t a perfect fit for the screws so when you take them out you have to knock them off the driver tip somehow. It’s like it’s an imperial metric mismatch but they are all official kreg parts so don’t know.

I think that's a feature, not a bug. You can stick the screw on the driver, and even though it's not magnetic, it'll stay on, allowing you to get into a tight space easily one-handed.

You don't really remove pocket hole screws much (though you certainly can with much less cam-out than Phillips head) so it's optimizing for the presumed one-way trip. I would assume anyway.

Almost every time I remove a pocket hole screw it's because I'm trimming something glued up (like a table top) and didn't plan for the saw blade when I put in the screws. Every time I think "heehaaw" and then I do it again the next time.

Re: List of screw drives

#243

Post by vertexFarm »

Lionsion wrote: post #212
vertexFarm wrote: post #186

Earlier quoted context omitted.

Ugh, except Pozidriv will still cam and tear up their own screws, and same with Phillips. That's the secret to this tidbit of information that is never included. They're both trash fasteners when used with a slightly different driver, but they're also trash even when used correctly. Robertson for life. When I was young I had a job assembling furniture and that, along with a couple Allen socket fasteners, was the only…

> Ugh, except Pozidriv will still cam and tear up their own screws, and same with Phillips. That's true, but using a Phillips screwdriver with a Pozidriv screw is worse than either system by itself. Robertson may be objectively better, but that's irrelevant to my point. I was I was addressing was one of confusion. I think your comment more properly belongs at the root than as a response to mine.

Fair enough, You're probably right.

Re: List of screw drives

#244

Post by vertexFarm »

antisthenes wrote: post #219
vertexFarm wrote: post #186

Earlier quoted context omitted.

Ugh, except Pozidriv will still cam and tear up their own screws, and same with Phillips. That's the secret to this tidbit of information that is never included. They're both trash fasteners when used with a slightly different driver, but they're also trash even when used correctly. Robertson for life. When I was young I had a job assembling furniture and that, along with a couple Allen socket fasteners, was the only…

Last time I tried to use a Robertson screw from Home Depot in a heavy duty application (building an AC frame and decking), it cammed out and the square opening in the screw literally became round. I tried compensating by applying more downward force, but eventually it was still camming out and the bit itself became a cylinder. It maybe better, but if the manufacturing quality is garbage, it's just as useless as the o…

Huh. I've never had that happen once out of literally thousands of screws from all kinds of different sources, including HD. Should be impossible for it to cam because the walls of the cavity are perpendicular. There's no thrust force being generated.

Maybe it was just a really bad batch?

Re: List of screw drives

#245

Post by [deleted] »

antisthenes wrote: post #219
vertexFarm wrote: post #186

Earlier quoted context omitted.

Ugh, except Pozidriv will still cam and tear up their own screws, and same with Phillips. That's the secret to this tidbit of information that is never included. They're both trash fasteners when used with a slightly different driver, but they're also trash even when used correctly. Robertson for life. When I was young I had a job assembling furniture and that, along with a couple Allen socket fasteners, was the only…

Last time I tried to use a Robertson screw from Home Depot in a heavy duty application (building an AC frame and decking), it cammed out and the square opening in the screw literally became round. I tried compensating by applying more downward force, but eventually it was still camming out and the bit itself became a cylinder. It maybe better, but if the manufacturing quality is garbage, it's just as useless as the o…

[deleted]

Re: List of screw drives

#246

Post by TeMPOraL »

ken wrote: post #156
grzm wrote: post #55

Earlier quoted context omitted.

The history is a little more interesting than that: > Lumber's nominal dimensions are larger than the actual standard dimensions of finished lumber. Historically, the nominal dimensions were the size of the green (not dried), rough (unfinished) boards that eventually became smaller finished lumber through drying and planing (to smooth the wood). Today, the standards specify the final finished dimensions and the mill…

It seems bizarre to me to define the standard 'size' of an item based on some aspect of the manufacturing process that is not part of the final product the user will ever see, or could measure. Shoe sizes often measure the size of the last , not the foot. One shoe company I've bought from in the past had a warning on their webpage that they use different manufacturing processes for different models, so the same numbe…

Added: for the people who - like me - have no damn clue what the hell "last" is, it's that wooden foot look-alike they use in shoemaking/repairing.

https://en.wikipedia.org/wiki/Last

Re: List of screw drives

#247

Post by TeMPOraL »

kazinator wrote: post #240
TeMPOraL wrote: post #231

Earlier quoted context omitted.

I also find shoe numbering bizarre. How could such a numbering system survive to this day? Why not use goddamn centimeters? (Fortunately, e-stores selling shoes were bitten enough by the ridiculousness of that problem that they ended up providing scales translating shoe numbers to centimeters.) Ultimately, the best workaround I've seen was the one the father of my SO used - he would measure the foot of his child, the…

US shoe numbering for men is simple. There is a bit of insanity in that women's and children's sizes are derived from that in more than one way. There are two ways of determining size, but they are supposed to coincide, theoretically. Manufacturers use the "last length" as the basis for shoe size. However, that is not the foot length, and how a shoe with a given "last length" fits a given foot is a variable and so th…

Yeah, I meant "foot centimeters" - the issue isn't about metric vs. imperial, I'm just writing from European experience. The issue is about "foot" vs "last" vs "shoe numbers".

I'm not fully convinced by the argument that manufacturers (or at least distributors) can't use foot centimeters - after all, somehow I can successfully buy shoes on-line by measuring my foot and then using vendor-provided foot-length-to-shoe-size conversion scale to pick appropriate size. From the experience of myself and everyone else I asked around, this works reliably.

Re: List of screw drives

#248

Post by hvidgaard »

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.

At all of the nearby hardware stores, there is a wide arrangement of pozidrive screwdrivers. If I recall correctly all of my "cross" bits for the powertool is pozidrive as well. It may not be widely available in the US, but it certainly is here in Denmark.

Re: List of screw drives

#249

Post by dragonwriter »

hvidgaard wrote: post #248
rconti wrote: post #193

Earlier quoted context omitted.

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

At all of the nearby hardware stores, there is a wide arrangement of pozidrive screwdrivers. If I recall correctly all of my "cross" bits for the powertool is pozidrive as well. It may not be widely available in the US, but it certainly is here in Denmark.

Pozidrive screwdrivers and bits are readily available in the US but have low cultural awareness; particularly, the indicator that heads require them and not Phillips is not recognized.

Re: List of screw drives

#250

Post by agumonkey »

dotancohen wrote: post #138
agumonkey wrote: post #80

Earlier quoted context omitted.

True. Recently I found a lcd tv outside, turns out one chip was partially failing, now it seems stable. Then my neighbor told me it was hers, which was a bit fun and awkward; but to be honest, had they ask me to fix it I would never have touched it. It's easier when it's considered trash and nothing to lose.

> Then my neighbor told me it was hers That is when you thank her for putting it out nicely instead of banging it up some more, implying that she did mean for someone else to come along and adopt it.

It was a 9 yo model so somehow they didn't really regret changing. It might sting sentimentally but 9yo is loong in these days for LCD TVs :)
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