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Old 09-04-2006, 10:56 PM   #1
jamesg602
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Question How do you convert from kg/mm to lb/in?

How do you convert spring rates from metric to in/lb? I tried a conversion calculator but I am not sure what 6K and 8K mean in terms of units. Are they kg/m, kg/cm or N/m?
Thanks
James
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Old 09-04-2006, 11:48 PM   #2
jamesg602
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Anybody?
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Old 09-04-2006, 11:51 PM   #3
AndyRoo
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8k means 8 kg/mm


multiply by 56 or so to get lbs/in


use www.onlineconversion.com if you want to be exact.


- andrew
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Old 09-04-2006, 11:58 PM   #4
jamesg602
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Talking Thanks

I was just about to dust of the old physics book!
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Old 09-05-2006, 12:16 AM   #5
littledrummerboy
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google does a good job... for example just type in "8 kg/mm to lbs/in" (without quotes) and you'll get the answer. google will do any conversion and math equations too!
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Old 09-05-2006, 12:29 AM   #6
jamesg602
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I was searching before I posted, but wasn't sure of the unit meaurments.
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Old 09-05-2006, 09:06 AM   #7
leecea
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Quote:
Originally Posted by littledrummerboy View Post
google does a good job... for example just type in "8 kg/mm to lbs/in" (without quotes) and you'll get the answer. google will do any conversion and math equations too!
That is so cool I didn't know Google could do that!
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Old 09-05-2006, 09:48 AM   #8
ButtDyno
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Adding this to the threads of note
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Old 09-05-2006, 10:50 AM   #9
InfamousDX
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Yup... google conversion is the best. Been using it for a while now. What i didn't know was that you can use multiple units, as in kg/mm or lbs/in... that's very cool.
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Old 09-05-2006, 01:02 PM   #10
Scooby921
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Here's the math (1kg/mm)*(25.4mm/1in)*(2.2lb/1kg) => 1 kg/mm = 55.88 lb/in

For quick reference:

5k = 279 lb/in
6k = 335 lb/in
7k = 391 lb/in
8k = 447 lb/in
9k = 503 lb/in
10k = 559 lb/in
11k = 615 lb/in
12k = 671 lb/in
13k = 726 lb/in
14k = 782 lb/in (yes, some people actually use springs this stiff)
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