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12-01-2020, 01:13 AM #21
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TeachMePlease liked this post
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12-01-2020, 01:54 AM #22
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12-01-2020, 01:59 AM #23
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12-01-2020, 02:18 AM #24
Which brings up a serious point...
OK, I'll admit that it makes sense for the US to commit to SI units. No real argument there.
BUT!
There is one area where our inch/traditional units rule supreme:
High-strength fasteners at attractive prices.
Due to our militaristic might, the US has an incredible range of MIL/NAS, Boeing (back when that meant something), etc. grade fasteners available, many at prices below equivalent hardware store grade junque.
From 2-56 socket caps in A-286 to 3" plus in MP35N, we have got quite literally tons of great, inspected hardware surplus from original use. From satellites > racecars. From missiles > bicycles. From submarines > sex toys.
Err, scratch that last one. It's only a rumor.
I've tried buying metric specialty hardware. Either very limited ranges of sizes, materials, and strengths, to simply megabucks and "et qui êtes-vous, monsieur?".
So keep your 8.8 M12's. Give me an NAS6208-xx that will kick its foriegn hiney back to The Olde Country!Last edited by Milland; 12-01-2020 at 07:01 AM.
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12-01-2020, 04:20 AM #25
Any fasteners at any prices. Metric sucks balls, inch is functionally superior.
And don't get me started on gear teeth. Whichever adolescent twit came up with module teeth should have their balls removed and jammed down their throat. What garbage.
Other than that, what a lovely system ... if you've got your head up your ass. No metric units fit anything practical. What a brilliant way to measure things in the real world.
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12-01-2020, 04:25 AM #26
Lets keep in mind, the termite is one nasty individual, and has caused great damage to this forum with his piss off attitude.
The termite insulted the tech from Monarch, and chased off many qualified machinist that discover he has lied about his past experience for all these years.
Its a disservice to working machinist to encourage this termite troll.
The 8 yrs I was here before this fake were much better!
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SIP6A liked this post
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12-01-2020, 06:28 AM #27
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12-01-2020, 07:30 AM #28
I like the inch system - it makes sense to me and is based on easy references as past threads have attested. That being said - who cares which system is used - as long as it is used correctly. It is no different than learning another language. Being fluent in more than one makes you a more useful person.
My bigger gripe is working with engineers or designers who do not have a good grasp of whatever system they are using. They have no concept of the difference between .005" and .0005" or .1mm and .01mm.
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12-01-2020, 07:45 AM #29
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12-01-2020, 10:17 AM #30
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Lewie liked this post
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12-01-2020, 10:23 AM #31
I don't think I could see by eye (at any distance) the difference between 1/2" and 12mm, but that's why they make micrometers/calipers...?
On a related note, i can tell the difference between metric and inch shcs as the metric have a slightly larger head dia to thread size ratio.
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12-01-2020, 10:23 AM #32
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Mtndew liked this post
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12-01-2020, 10:25 AM #33
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12-01-2020, 10:32 AM #34
The big point for the OP is what system is he most likely to find offered for sale, and at what prices. If I lived in Europe I would buy metric tooling but around here the inch stuff is widely available at competitive prices.
IMO there is far too much fuss from "elsewhere" over the USA not going fully metric. We were taught the basics of the metric system in the 1960s and most Americans, especially in technical fields are "bilingual". When I write a test report on a product the units are always metric, even if some measurements were taken using our system. As do most, I can switch seamlessly back and forth as needed. In my home shop it is mostly inch, although I use metric hardware and dimensions when needed to suit an existing item.
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12-01-2020, 10:36 AM #35
EG, you surprise me that you landed on this side of the argument. One 10 millionth of the distance from the equator to the north pole. What a wonderful basis for a unit. One place where it fits pretty well is dilation before child birth. Only the doctors and nurses back in the 80s universally called them sonometers instead of centimeters. Even spell check here says I spelled centimeter wrong. No use wasting my typing on the argument cause my opinion will not change a thing.
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12-01-2020, 10:44 AM #36
Metric gears are upside-down and backwards, it's ghastly. The thread system is not too lovely, either. I don't care that much about the units, hell, why not choose 1 gazillionth the distance from the north pole to god's nose ? But in practice, I end up doing all gear stuff in DP then translating back, cuz, you know, DP makes sense.
And I don't care if the numbers work out cutesy on threads, I care if the stud doesn't pull out of the block. Their fine-pitch coarse-pitch situation is awful. Plus jap metric and german metric fasteners don't interchange, which I thought was the point of the whole damn system ...
As far as regular dimensions, no matter, but in those two areas I think metric sucks
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12-01-2020, 10:48 AM #37
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crazygoat liked this post
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12-01-2020, 10:50 AM #38
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12-01-2020, 10:52 AM #39
Ya, I don't see why we have to "pick" one. The only thing that occasionally trips me up is converting a metric pitch into TPI (I got a 50/50 chance of doing the conversion backwards and getting some stupid number for TPI
) to run in the cnc mills for rigid tapping. Thread milling, no problem, see a dim like .1181" I know that's 3mm, etc etc
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12-01-2020, 10:58 AM #40
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