Coefficient of friction of oak on mild steel 1

[tnteng]

Can anyone give some feedback on what pressure is assumed when a coefficient of friction is listed for oak (or wood) on steel in various tables that are available. The friction coeficients that I have found for oak (or wood) on steel have all been in the range of 0.2 to 0.6. For my current problem I have selected .4 for the friction coefficient. If the bearing pressure between the steel and wood increases beyond a certain limit, the friction coefficient would likely shoot up to some higher value due to compression of the wood fibers.

Thanks in advance for any help on this matter.

Tony Billeaud
Mechanical Engineer
Franks Casing Crew

 

[unclesyd]

I have a value at rest of .62 in the range of 4 to 20 lbs #/sq in. This wet in the direction of the grain.

The value given for motion is .26 under the same conditions.

It is a strange coincidence that I have just been looking at a "pony brake" for a grand daughters project.