INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

friction

friction

(OP)
Is there a difference in frictional coefficients for sliding verses rotation?  I am working on a project where I going through someone else's work and his formula's use a rotational friction coefficient and a sliding friction coefficient.  Does anyone have a reference name for me to look up the range of values?

Thanks

RE: friction

What's the example? Is it like a wheel rolling/rotating down a plane vs. sliding down the plane? It sounds to me like he's referring to the coefficients for static friction (for the rolling/rotating case) vs. kinetic friction (for the sliding example). Most dynamics texts would have values for the sliding coefficient and statics texts should have statics values in them somewhere. Also try a google search for 'static' and 'kinetic' friction coefficients

RE: friction

(OP)
This has to do with boring machine and the friction involved in the drill head and drill string.  I agree that with your thought on his intent may have been static vs kinetic.

Thanks for your help.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close