Metric System

Discussion in 'Woodturning Discussion Forum' started by Bob Chapman, Jul 14, 2014.

  1. Bill Boehme

    Bill Boehme Administrator Staff Member

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    McAfee says that is a suspicious site and blocked part of the content. I have discovered lately that often means that the page contains an ad from one of its competitors. :rolleyes:
     
  2. hockenbery

    hockenbery AAW Advisor Staff Member

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  3. Leo Van Der Loo

    Leo Van Der Loo

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    John next time grab a 6 point ⅝ wrench, it is only about 125 thousands larger than 16mm.
     
  4. Fred Belknap

    Fred Belknap

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    It really makes a lot of sense to the tool makers, I have a farm and need tools to work on equipment so I need two system of tools. More tools equals more money for them, works like a charm. Can't remember what the size is for a oil drain plug just take a handful, 16/17/19mm or 5/8 or 3/4 etc.
     
  5. Leo Van Der Loo

    Leo Van Der Loo

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    Odie metric bolts use metric values, as mm from top to top of the threads, like 1mm or 1.25mm etc, like the Oneway spindle being 33 mm diameter and the threads .3.5 mm from top to top

    There are more people speaking Spanish IIRC and there are a lot of Chinese, but they speek dis-similar languages I was told.

    60 years ago I had to learn a new measuring system, namely the inch system, (though not the stone and chain measures o_O) but feet and inches, as I was schooled in the metric system, but the inches were still in use in the metal industrie and mechanical, though metric was getting more and more into the systems that were used, so I was then using both and had no problem conversing in either, even now I do know the sizes that are approx in inch and mm like ¼=6mm 5/16=8mm ⅜=10mm 7/16=11mm ½=12.5mm ⅝=16 ¾=19mm and so on.

    But where metric really shines is converting lengths into cubic measurements and those into weights, pressure into water column using just cm per square inch.

    I think the us problem is that there were too many english persons that were always doing things different than the rest of the world, like driving on the wrong side of the road ;), measure in what feet, chains or stones, gallons and then the us Gallon that isn’t :rolleyes:

    Me I use whatever works and I don’t measure miles in mm or inches, there are mm cm dm meter deca-meter hecto-meter kilo-meters, so use them. now if there were enough teachers that really do understand the metric system and the way to use it, then we would have kids that would not be confused so much, and please don’t get the media to come and help giving wrong conversions etc. :p:)
     
    Last edited: Sep 19, 2017
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  6. Paul Gilbert

    Paul Gilbert

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    Bill -
    "A nautical mile is approximately one arc minute of latitude -- the relationship is approximate because the earth isn't a perfect sphere, so an arc minute at one latitude is not exactly the same it would be at another."

    I did a lot of navigation while in the Navy. I used my dividers to measure Nautical miles by placing them on the right side of the chart which was degrees latitude. (I know very old "60's technologies) Just as a point of metal mastubaritaion, how much to you think that I was off while navigating off of San Diego as apposed to Northern Japan.

    Basically I hate the Imperial system. When cooking I have taught myself to remember that 3 tsp = 1 tb, 2 tbs = 1 oz, 8 oz = 1 Cup, 2 Cups = 1 Pint, 2 Pints = 1 Quart, 4 Quarts = 1 Gallon, 42 Gallons - 1 Oil Barrel, and finally a hogshead is 54 gallons. In the shop I deal with my conflicted sense of order with what my mental images are. I can visualize 1 inche, one ft. and 100 miles. I would love to be forced to relearn some parts of the SI system (BTU, PSI, HP) excluded.
     
  7. odie

    odie

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    I was in HF the other day looking at vernier calipers that were calibrated in fractions.......almost bought it, but then thought how stupid it was to buy something that never really was a problem for me anyway. I have a chart on the wall that gives me decimal equivalents......no problem. :)

    -----odie-----
     
  8. Emiliano Achaval

    Emiliano Achaval

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    I grew up in Argentina with the metric system, for those of you who dont use it, i's so much easier to understand than the US system! LOL
     
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  9. odie

    odie

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    The only way we will ever convert to the metric system, is to evolve into it. Us old fogies won't do it, but our children might, if they grow up with it......:D

    -----odie-----
     
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  10. John Torchick

    John Torchick

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    The only time my wife uses measured quantities when baking or cooking is when she is trying a new recipe. After that, it's add and taste. My MIL was asked for her potato salad recipe. She carefully measured out everything and said it was the worst that she ever made.
    Back to topic- it will take a long time for those on the English system to change over to the metric system.
    Lou, I just used a 14 inch adjustable wrench for a while until I found the 16 mm socket.
     
  11. John Turpin

    John Turpin

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    I don't think any significant American shift to metric will happen in my lifetime. I don't think it's because of any political/social defiance. It's just that there's no need to. I'm neutral on the subject, personally.
     
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  12. Bruce Schoenleber

    Bruce Schoenleber

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    Jimmy Carter tried to get us to do it. We voted him out of office:D.
     
  13. Gerald Lawrence

    Gerald Lawrence

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    In Pharmacy many, many years ago they taught us 3 systems....Avoirdupois, Metric and US customary (closely related to imperial) . Ok tell me how many grains in an ounce. By the way an ounce is not 30 GM as we now see it measures.
     
  14. hockenbery

    hockenbery AAW Advisor Staff Member

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    Change is always faster when there is a sense of urgency.....

    Where there is a need we have shifted to metric.
    Our military uses metric for most things.
    The scientific community uses metric.
    AAW journal uses metric measurements along with imperial.

    I haven't figured out why softdrinks are sold in liters.
     
  15. stu senator

    stu senator

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    I believe that the auto industry uses metric. At least in the hardware, I don't know about the part drawings and other internal stuff.

    They converted to metric for one major reason,$$$$$$, they wanted to source material and sell worldwide. Perhaps as the world economy gets bigger the rest of industry will follow along.

    Will the rest of the country follow along?

    Stu
     
  16. Zach LaPerriere

    Zach LaPerriere

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    I'm a fan of both. Metric is great for so many things, especially those divisible by 10. Perfect for engineering. Great for so much.

    The one place the imperial system is superior in my opinion, is woodworking. A cm is a silly measurement for human proportion and things we use on a daily basis—sure you can get used to it. But an inch is a glorious thing, because we can divide it in half again and again and it's still a measurement we can conceptualize and do simple math between our ears. From framing a house right down to cabinetry, imperial is king...wait a minute, isn't that where we got imperial???

    As the son of a machinist, I was raised hearing long passionate lectures about how thousands of an inch are far superior for fine measurements. I can't succinctly repeat the reasons having barely worked in those fine tolerances myself...what do you think, Odie?
     
  17. tdrice

    tdrice

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    I don't really care which system we use nor what we call it I am conversant with both. I'm just tired of having to keep two sets of wrenches and try to guess whether the pin or bolt or whatnot is imperial or metric. Lets make the change and be done with it.
     
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  18. John Torchick

    John Torchick

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    7,000 grains to the pound. 333 shotgun shells per pound.
     
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  19. Mike Johnson

    Mike Johnson

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    Back in my youth we used the cubit as a unit of measure.
     
  20. odie

    odie

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    I spent the last 20 years of my working life as a machine operator in a shop making medical and dental tools for the industry. Many of these tools were measuring instruments. I can't recall of ever seeing any of these instruments calibrated to Imperial.....but, all of them were manufactured to a 1000th of an inch tolerance. Everything could easily have been manufactured to a thousandth of a centimeter measurement tolerance.....but, it wasn't. I have no doubt that someday, it will be. Off the top of my head, 2.5 thousandths of a centimeter would be .001"......I think. o_O

    ------odie-----
     
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