kg and newtons

O

overbore

Member

Dec 24, 2001

362

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• Dec 22, 2005

• #1

I couldnt find anything as far as a chart to show the
difference between kg/mm to nm/mm.
Anyone have anything so I could see the difference or
a formula.
Someone said that a 4.2 in newton is equal to about
.43 or .44kg in spring rates.
ktm uses newtons and everyone else seems to use
kg.
Thanks overbore.
And everyone Merry Christ mas

 

marcusgunby

LIFETIME SPONSOR

Jan 9, 2000

6,450

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• Dec 22, 2005

• #2

i think thats about right,on fork springs its close to one rate different, on shock springs the difference is more i think.Its a pain to be honest.

 

MrLuckey

Fire Marshall Ed

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Feb 9, 2000

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• Dec 22, 2005

• #3

If I am not mistaken try multiplying kg X 9.806650 to get newtons when talking about force. or dividing nm by 9.806650.

The difference would be more on (shocks) only due to larger numbers involved, pretty sure the conversion factor stays the same no matter what :)

 

T

Tyler3386

Member

Jul 25, 2005

51

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• Dec 22, 2005

• #4

Well a newton is force and kg is mass. To go from kg to newtons you would take the kg times the acceleration due to gravity which is ~9.8 m/s^2. Those numbers would make sense if thats what they are using to measure it.

 

marcusgunby

LIFETIME SPONSOR

Jan 9, 2000

6,450

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• Dec 23, 2005

• #5

MrLuckey said:

The difference would be more on (shocks) only due to larger numbers involved, pretty sure the conversion factor stays the same no matter what :)

Click to expand...

Yes it is, thanks for pointing that out :nener:

 

O

overbore

Member

Dec 24, 2001

362

0

• Dec 31, 2005

• Thread starter
• #6

The notation on formula is
kg times distance in mm times 9.8 divided by time times 2
or no not right.
My sons new bike has 7.6 newton spring on rear and trying to figure out what it is
in kg to fing out what range its good for.
Thanks overbore

 

crazy4nitro

Member

Aug 31, 2005

574

0

• Dec 31, 2005

• #7

well the way I read it is you have a .77kg spring..

based on 7.6 x 0.101972 to get from Newtons to Kg-force/sq meter

now if your looking for Kg to (sq/mm) the number works out to be 770....
based on going from meters to millimeters


I hope this number is something you can work with or was what you was looking for.

Crazy

P.S. I dont argue with math,I just "Plug and Chug"...

 

O

overbore

Member

Dec 24, 2001

362

0

• Jan 1, 2006

• Thread starter
• #8

This is a rear spring so that cant be right can it being a .77.
I see everyone else post like a 8.8 kg spring for about the weight I am looking for
but cant figure out how to convert with the formulas listed the 7.6 newton to kg.
would that be right and just the decimal in the wrong place.
ovebore

 

crazy4nitro

Member

Aug 31, 2005

574

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• Jan 1, 2006

• #9

I belive that is correct...

 

T

TimberPig

Member

Jan 19, 2006

859

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• Jan 20, 2006

• #10

As already posted, 1 newton = 1kg*G, where G is the acceleration due to gravity, which is approximately 9.81m/s2. So multiply your kg/mm measurement by 9.81, or divide the newton/mm measurement by 9.81. The 7.6 newton/mm spring is indeed 0.77kg/mm. Since kg/mm and n/mm both use the same measure for distance, there is no need to do anything with the distance. Keep in mind it is a measure of the rate of force required for each mm of compression ( linear spring rate). The one where meters squared, and mm squared were included is actually pressure, not spring rate.