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Thread: imperial vs. metric

  1. #21
    Senior Member blabbermouth Speedster's Avatar
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    Quote Originally Posted by biglou13 View Post
    why are razors width's measured in fractional imperial sytem vs metric?

    found a chart for the math challenged (like me)

    Conversion Table: fractional inches, decimal inches, mm
    Search sites typically do unit conversions in the address bar of your internet browser, so you do not need an antiquated conversion chart unless your PC is not handy. For example, say I want to convert 13/16" to mm, I would just type the following into the browser's address bar from DuckDuckGo.com:

    13/16" to mm (or '13/16 in to mm')

    Then press the Enter key or click Go, whichever you prefer to get the following:

    Name:  ddg.jpg
Views: 65
Size:  27.6 KB
    BobH and Gasman like this.
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  2. #22
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    Both systems have their utility. As long as I am dealing with basic units: pounds, kilograms, liters, gallons, pints, miles, kilometers, inches, centimeters, I am just fine. But when you start throwing in some of the less common units like stones, furlongs, hands, grains, etc. I have to find a conversion chart.

    A pint's a pound the world around and a liter of water weights a kilogram.

    One area where the metric system shines is in navigation. The meter (or is it metre) was defined originally as 1 ten-millionth of the distance from the equator to the north pole along a meridian. Thus, the circumference of the earth is 40,000 kilometer. Thus, use of meters and kilometers is very handy. It is the basis of the UTM (Universal Trans Mercator) mapping coordinate system as well as the US National Grid system. That is why the military measures distance in kilometers, or "clicks" for short.

    Of course, the circumference of the earth can change slightly due to earthquakes, volcanoes and other geological phenomena, so the meter is now defined relative to the speed of light in a vacuum.

    In the shaving world, we tend to use both systems for various reasons. For example, a 7/8" wide straight razor blade tends to have a spine that is approximately 7mm thick. Also, those of us who hone our own razors define the abrasives using either a mesh rating (threads per inch), or in microns (1 millionth of a meter). Occasionally, you might even see something measured in mils (thousandths of an inch). Since the market for shaving goods is global, it is best to be fluent in both systems. Depending upon the manufacturer, your shaving soap might be sold either be in a 4 ounce tub, or a 150 gram tin. Hone sizes are described in either inches or millimeters. If you do not know both systems, get a conversion chart.

  3. #23
    Veteran Maryland998's Avatar
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    Try working on a old Norton Commando motorcycle.

    Some models have American Standard, British Standard and also Whitworth fasteners.
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  4. #24
    Senior Member blabbermouth
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    If you want to see how something as simple as conversions from one measuring system to another could have lead to a large tragedy read about the Gimli Glider. Specifically the accident investigation report's section on refueling.

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

    Bob
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    At this point in time... gssixgun's Avatar
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    Quote Originally Posted by Speedster View Post
    Search sites typically do unit conversions in the address bar of your internet browser, so you do not need an antiquated conversion chart unless your PC is not handy. For example, say I want to convert 13/16" to mm, I would just type the following into the browser's address bar from DuckDuckGo.com:

    13/16" to mm (or '13/16 in to mm')

    Then press the Enter key or click Go, whichever you prefer to get the following:

    Name:  ddg.jpg
Views: 65
Size:  27.6 KB

    Thank You for making it very clear why they stayed with Inches
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    "No amount of money spent on a Stone can ever replace the value of the time it takes learning to use it properly"
    Very Respectfully - Glen

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    biglou13 (01-12-2019)

  8. #26
    At this point in time... gssixgun's Avatar
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    Now if you think Razors make no sense with Inches and Metrics,, let's talk Cartridges and Shotgun Shells Bahahahaha


    "No amount of money spent on a Stone can ever replace the value of the time it takes learning to use it properly"
    Very Respectfully - Glen

    Proprietor - GemStar Custom Razors Honing/Restores/Regrinds Website

  9. #27
    NZ's okayest dad 1997 Grazor's Avatar
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    Quote Originally Posted by Maryland998 View Post
    Try working on a old Norton Commando motorcycle.

    Some models have American Standard, British Standard and also Whitworth fasteners.
    That's why they never made it past 30000 miles without a total rebuild... Or was that kms?..
    Into this house we're born, into this world we're thrown ~ Jim Morrison

  10. #28
    Senior Member blabbermouth
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    The mill wrights used to joke that their metric wrench kit was an adjustable wrench.

    Bob
    Life is a terminal illness in the end

  11. #29
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    Quote Originally Posted by Speedster View Post
    Search sites typically do unit conversions in the address bar of your internet browser, so you do not need an antiquated conversion chart unless your PC is not handy. For example, say I want to convert 13/16" to mm, I would just type the following into the browser's address bar from DuckDuckGo.com:

    13/16" to mm (or '13/16 in to mm')

    Then press the Enter key or click Go, whichever you prefer to get the following:

    Name:  ddg.jpg
Views: 65
Size:  27.6 KB
    I mic’d An edge at .67 inches width. Or 17 mm Express that in factional inches....

    Now do we Refer to it as 19/37 Boker , or 43/64 Henckel?

    If charts aren’t you’re thing link may be more useful... https://www.inchcalculator.com/inch-...on-calculator/
    Last edited by biglou13; 01-12-2019 at 07:35 PM.
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  12. #30
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    Quote Originally Posted by gssixgun View Post
    Now if you think Razors make no sense with Inches and Metrics,, let's talk Cartridges and Shotgun Shells Bahahahaha


    What is the difference 5.56 and .223.?

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