A Little Metric Help Please - BMW F800 Riders Forum & Registry



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  1. #1
    Randyjaco's Avatar
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    Of course, Americans are idiots when it comes to the measurements used everywhere else in the world. I have a selection of torque wrenches that should help me when I venture into Metrics.
    The problem is, I can't figure out the abreviations. My combo torque wrenches measure in Foot pounds, Inch pounds, M KGB, (CM. KPS) and CM. KGS. Of course my BMW manual measures torque in Nm (Newton Meters). I went to the store today to look for a torque wrench that measured in Nm. Guess what, there doesn't seem to be such an animal, at least were I looked.

    So what gives? So I just got through setting my combo torque wrenches to inch pounds of calculated Nm. and looked at the metric equivalents in their M KGB, CM. KPS, CM.KGS. 265 in/lbs (30 Nm) is nowhere near 30 anything on my torque wrenches.
    I sure can't figure the equivalancies. It it me or do I just have crappy torque wrenches?
    Any help would be appreciated.
    2010 F800ST 

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  4. #2
    N4HHE's Avatar
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    "M KGB"? Is the B an F?

    9.8 Newtons in a Kilogram-Force. A Newton is a unit of force while a kilogram is a unit of mass. A kilogram-force is the force a kilogram of mass exerts under standard Earth gravity.

    30 Nm is 22.1 lbf-ft (pounds-force foot)
    2016 Yamaha FJR1300A; 2016 Beta 430RS; 2007 BMW F800S; 2009 Husaberg FE450; 2016 Subaru Outback; 2018 F150; 2013 Tesla Model S 85; 1983 Porsche 928S; 9 cats 

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    Quote Originally Posted by N4HHE View Post
    "M KGB"? Is the B an F?

    9.8 Newtons in a Kilogram-Force. A Newton is a unit of force while a kilogram is a unit of mass. A kilogram-force is the force a kilogram of mass exerts under standard Earth gravity.

    30 Nm is 22.1 lbf-ft (pounds-force foot)

    I looks like I got it wrong. It is actually "M. KGS"

    Google says that it's a Kilogram Meter equal to 9.80665 Nm. No wonder

    CM. KGS Kilogram Centmeter equal to 0.0980665 Nm

    So basically I have torque wrenches with useless conversions. Its easier to use my Imperial Torque wrenches and do the math
    2010 F800ST 

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    I had a chuckle reading this. Glad you got it sorted.

    Gives you an appreciation for the NASA folks who worked on the Mars Climate Orbiter. (Missed because spacecraft engineers failed to convert from English to metric.)
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    N4HHE's Avatar
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    Quote Originally Posted by Randyjaco View Post
    I looks like I got it wrong. It is actually "M. KGS"

    Google says that it's a Kilogram Meter equal to 9.80665 Nm. No wonder

    CM. KGS Kilogram Centmeter equal to 0.0980665 Nm

    So basically I have torque wrenches with useless conversions. Its easier to use my Imperial Torque wrenches and do the math
    9.8 is only 2% off 10. Your torque wrench is not that accurate. Use "M KGS" and shift a decimal point. You are overthinking it.

    For 30 Nm use 3.0 M-kg.
    2016 Yamaha FJR1300A; 2016 Beta 430RS; 2007 BMW F800S; 2009 Husaberg FE450; 2016 Subaru Outback; 2018 F150; 2013 Tesla Model S 85; 1983 Porsche 928S; 9 cats 

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    I'm really surprised you can't find a wrench that read N*M, every wrench I've owned for the last 30 or so years read either Ft*lbs (or inch*lbs) and N*M, from the cheapies I got from Sears and Harbor Freight long ago to the higher end stuff I have now. Never seen it broken down into cm or M, that's an odd one.

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    According to the Harbor Freight website, all the torque wrenches listed measure in imperial units. At the local store, there were no torque wrenches that measured in Nm.
    I was able to buy a 1/4" wrench that measures in Nm on Amazon. Not exactly SnapOn quality, but it arrived today
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  13. #8
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    I have two Torque Wrenches , both have dual measurements LBS/FT & Nm (LBS= pounds)

    50 LBS Ft = 68 Nm
    37 50
    74 100
    160 216

    Hope this helps
    Ajay

    F800GT 2018 

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    Something tells me, if I were living about anywhere outside the US, I wouldn't have had the problem
    2010 F800ST 

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    Quote Originally Posted by Randyjaco View Post
    Something tells me, if I were living about anywhere outside the US, I wouldn't have had the problem
    No, because even more so torque wrenches all come from China.
    2016 Yamaha FJR1300A; 2016 Beta 430RS; 2007 BMW F800S; 2009 Husaberg FE450; 2016 Subaru Outback; 2018 F150; 2013 Tesla Model S 85; 1983 Porsche 928S; 9 cats 

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    RobA is offline F800Riders.org Supporter
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    I found out one of my neighbours apparently frequents this forum and works for Hazet tools. I could tell by the way he was screaming bloody murder from his balcony about generalizations like these and people buying cheap chinese and complaining about quality later.
    Pretty sure if you look long enough, you'll find well built tools made in the US too.

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    Quote Originally Posted by Randyjaco View Post
    Of course, Americans are idiots when it comes to the measurements used everywhere else in the world. I have a selection of torque wrenches that should help me when I venture into Metrics.
    The problem is, I can't figure out the abreviations. My combo torque wrenches measure in Foot pounds, Inch pounds, M KGB, (CM. KPS) and CM. KGS. Of course my BMW manual measures torque in Nm (Newton Meters). I went to the store today to look for a torque wrench that measured in Nm. Guess what, there doesn't seem to be such an animal, at least were I looked.

    So what gives? So I just got through setting my combo torque wrenches to inch pounds of calculated Nm. and looked at the metric equivalents in their M KGB, CM. KPS, CM.KGS. 265 in/lbs (30 Nm) is nowhere near 30 anything on my torque wrenches.
    I sure can't figure the equivalancies. It it me or do I just have crappy torque wrenches?
    Any help would be appreciated.
    Try this site: https://www.thecalculatorsite.com/co...nch-pounds.php

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