Coefficient of friction plastics

[Dan B]

Howdy all. I'm looking for a table that lists the coefficient of friction of numerous plastics. I'm designing a part that slides in an anodized aluminum bore. It has a plastic brake that expands in the bore slowing the part's rebound off a spring. The plastic would need good wear resistance as well as some friction against the aluminum.
Delrin has the right wear and hardness but is too slippery.
Thanks,
Dan

[warmstrong1955]

Take a look here:
http://machinist-materials.com/comparis ... astics.htm

There's a lot of info on the net. Mcmaster Carr also has charts on the properties of plastics.


Bill

[Lew Hartswick]

The "Handbook of Chemistry and Physics" by CRC Press. Should be one in your local library.
...lew...

[Dan B]

Thanks for the help everyone.
This is for a hammer in an air rifle. I've made many and used abs plastic. I just made one for a new rifle model. The surface area of the brake is much reduced and I think it will work better if I could find a stickier material.
I can change the geometry of the parts to increase braking force as well.
Dan