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Old 02-13-2011, 08:57 PM   #1
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Default tc springs rate

is there a tool that i can use to check the spring stiffness ?i got some tamiya spring with no marks on them.
thanx
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Old 02-14-2011, 03:56 AM   #2
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Maybe, but it would probably be expensive.

You can do it for free with a vernier. Measure the wire thickness and the spring diameter. Count the number of coils (don't include the ground/closed coil at each end) then use this calculator:

http://www.engineersedge.com/calcula...ring_k_pop.htm
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Old 02-14-2011, 05:41 AM   #3
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that calculator is net,if you are really lazy and know the brand you can look at a chart
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Old 02-14-2011, 02:39 PM   #4
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Quote:
Originally Posted by daleburr View Post
Maybe, but it would probably be expensive.

You can do it for free with a vernier. Measure the wire thickness and the spring diameter. Count the number of coils (don't include the ground/closed coil at each end) then use this calculator:

http://www.engineersedge.com/calcula...ring_k_pop.htm
ok i did put the 3 measurements in the calculator, what should i click then?
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Old 02-15-2011, 01:58 AM   #5
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Quote:
Originally Posted by guinnes.s View Post
ok i did put the 3 measurements in the calculator, what should i click then?
Click "Find K constant", the spring rate will then appear in the first box.
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Old 02-15-2011, 09:53 AM   #6
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Quote:
Originally Posted by guinnes.s View Post
is there a tool that i can use to check the spring stiffness ?i got some tamiya spring with no marks on them.
thanx
Should be able to make a jig with a fish scale. Measure load vs deflection. We did something like it in Physics 101 lab in college.
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