Teflon-steel friction coefficients

[serbring]

Hi guys,

I need the dynamic friction coefficient between steel and teflon. Do you know where I can get it?

Thanks

 

[AIR&SPACE]

Take these with a grain of salt (ie, YOU double check their sources to make sure they're correct before just using the values).


http://www.engineeringtoolbox.com/friction-coefficients-d_778.html"
and
http://hypertextbook.com/facts/2004/GarvinTam.shtml"

It looks like you can reasonably assume 0.04 for both $\mu_{s}$ and $\mu_{k}$ for most teflon-X interactions.

 

[serbring]

Take these with a grain of salt (ie, YOU double check their sources to make sure they're correct before just using the values).


http://www.engineeringtoolbox.com/friction-coefficients-d_778.html"
and
http://hypertextbook.com/facts/2004/GarvinTam.shtml"

It looks like you can reasonably assume 0.04 for both $\mu_{s}$ and $\mu_{k}$ for most teflon-X interactions.

Thanks but I haven't found in your links the dynamic friction coefficient of teflon-X interactions.

 

[Q_Goest]

Hi sebring. The coefficient of friction is a function of contact stress, lubricants, and the type of additives and reinforcement fibers. Additives include things like molydisulfide which is a commonly used dry lubricant. Dynamic friction coefficient can vary from about 0.4 if contact stress is low (aprox. 20 psi or less) to about 0.02 for high contact stress (aprox. 1000 psi or more). That's obviously a very wide range so if it's important, you really need to test it given the actual conditions you will have.

 

[AIR&SPACE]

Thanks but I haven't found in your links the dynamic friction coefficient of teflon-X interactions.

Just so I'm clear, my notation of "teflon-X" is supposed to mean teflon-(some other surface).

With this in mind, it should be pretty easy to find the coefficients. Let me know if you still have trouble.

 

[serbring]

Just so I'm clear, my notation of "teflon-X" is supposed to mean teflon-(some other surface).

With this in mind, it should be pretty easy to find the coefficients. Let me know if you still have trouble.

I have understood this, but I haven't found that data, please may you show me where you get this in your links?

thanks

 

[serbring]

Hi sebring. The coefficient of friction is a function of contact stress, lubricants, and the type of additives and reinforcement fibers. Additives include things like molydisulfide which is a commonly used dry lubricant. Dynamic friction coefficient can vary from about 0.4 if contact stress is low (aprox. 20 psi or less) to about 0.02 for high contact stress (aprox. 1000 psi or more). That's obviously a very wide range so if it's important, you really need to test it given the actual conditions you will have.

I need to simulate it in a multibody software, so I can take into account some special effects in a formula. In my case no lubrificants are used and unfortunately I have no data about the teflon type, I know just roller dimensions.
However I have found a report about stainless steel-teflon friction and I couldn't imagine it has a so wide range: from 0.05 to 0.2 :(
Do you have some data or formulas you think it could be useful for me

 

[AIR&SPACE]

I have understood this, but I haven't found that data, please may you show me where you get this in your links?

thanks

Check attachments

 

[serbring]

Check attachments

Oh thanks, but in the second link there are just static friction in dried contact and in greased contact, instead in the other one there is just friction for teflon-different kind of teflon :(

however thanks a lot