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List of screw drives

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Re: List of screw drives

#231

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…

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, then cut a wooden stick to appropriate length, and go with that stick to the shoes store.

Re: List of screw drives

#232

Post by TeMPOraL »

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.

Or depending on the particulars of your situation and the neighbour, you can instead turn that experience into a date :).

Re: List of screw drives

#233

Post by grmarcil »

simonbarker87 wrote: post #214
grmarcil wrote: post #210

Earlier quoted context omitted.

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), wit…

Yeah I’m in the UK, ok so probably as rare as square heads here then.

Interesting, I did not realize square drive was uncommon in the UK. It's a really nice screw head to work with, and as someone mentioned elsewhere in the thread, becoming more common in certain woodworking applications in the US.

Re: List of screw drives

#236

Post by pasbesoin »

mattmillr wrote: post #196
Lionsion wrote: post #175

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.

They also have, or had, a circa $25 corded drill kit for sale (going by memory of briefly seeing, a year or two ago).

If someone doesn't have a drill and is contemplating purchasing and constructing a substantial piece of IKEA furniture, such as my parent's TV stand -- lots of bits to screw together. Under those circumstances, I suggest maybe they want to buy one of the drill kits.

I expect you can get a better corded drill elsewhere, and buy the relevant bits, for not much more. But, KISS, with regard to the amount of shopping to be done.

P.S. Well, what do you know. US $20, now, and cordless.

https://www.ikea.com/us/en/catalog/products/00196101/

Re: List of screw drives

#238

Post by dmurray »

bluGill wrote: post #157
dmurray wrote: post #133

Earlier quoted context omitted.

But it's equivalent (in terms of capacity and robustness) to all other half inch pipes, the first of which had a half inch diameter. Or something like that - the Wikipedia page is complicated. In some ways that's more useful. If you're designing a gas pipe for a house you probably care more about "how much gas can I get through this pipe" and "what is the failure rate" than "will I be able to fit it through a 0.83 in…

No it isn't equivalent to all other pipes in terms of capacity and robustness. It is equivalent to the COMMON pipe today, but you still have to watch because some applications use the same thread/outside diameter but the walls are thicker. Also there are still some old pipes out there that really do have the 1/2 inch inside diameter, they are equivalent in terms of robustness, but obviously not capacity. Of course I'…

Is it correct to say it's equivalent or better than the "standard" half inch pipe in all three of: inside diameter (larger is better), outside diameter (smaller is better) and robustness? With the "standard" half inch pipe actually being an old type that is now obsolete?

Re: List of screw drives

#239

Post by Sohcahtoa82 »

bagels wrote: post #205
jammi wrote: post #61

Earlier quoted context omitted.

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.

> destructive removal

When in doubt, drill it out?

Re: List of screw drives

#240

Post by kazinator »

TeMPOraL wrote: post #231
ken wrote: post #156

Earlier quoted context omitted.

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…

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 the fit ultimately requires testing. The last length is supposed to be about two shoe sizes larger than the foot length.

The last length formula is L3 - 24. So a last length of 12 inches (one foot) corresponds to size 12. From there, surrounding sizes are 1/3 of an inch increments. Which is the odd thing: where else you do you see increments of 1/3 inch?

Thus, in any case, if you have a 12" foot, that's a US men's size 14.

The foot measuring instrument you see in stores, Brannock's Device, accounts for this and so its formula is L3 - 22.

So these sizing systems are intended to coincide, but are different estimators.

You can see that using centimeters doesn't solve all the problems. Suppose centimeters were used, but the manufacturers used last-length centimeters rather than foot centimeters. You'd have to convert your foot length to last length according to some rule of thumb, and then ultimately resolve things by trying the shoe. If manufacturers had to use foot centimeters, they wouldn't be able to measure some trivial property of the shoe like last size to determine size. Foot centimeters aren't absolute; they would have to use some representative model of a foot and base it off that: still no guarantee that a 27cm size based on a representative model foot fits your 27cm foot.

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