×
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!
  • Students Click Here

*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.

Students Click Here

Jobs

Small Clutch bearing test process

Small Clutch bearing test process

Small Clutch bearing test process

(OP)
I have a small one way clutch bearing that I would like to 'cycle test'
The rated value of the clutch is around 1.5nm. Ideally I would like to exercise the clutch by applying a force of 1nm for lets say 5 seconds, release the force for 5 seconds and the repeat for x many hours.

Has anyone any tips on how I could best achieve this.

I'd be grateful for any help.

RE: Small Clutch bearing test process

nm=nanometer??
Nm= Newton Meter

RE: Small Clutch bearing test process

Fixed clutch, shaft that can rotate, weighted lever arm on the shaft to supply the torque, support the weight with a platform that moves up and down.

Your load cycle is to lower the support platform and the clutch holds the weight, raise the platform to unload the clutch.

RE: Small Clutch bearing test process

LenTikular-

What you describe is called a "stroking test".

Before designing your test rig, the first thing I would suggest is performing a thorough analysis of the clutch system using the same materials, structural characteristics & operating conditions that you intend to test. The purpose of testing is normally to validate/refine your analysis work. Roller or sprag type clutches operate at very high contact pressures between the race and element surfaces, and even tiny amounts of race/element misalignment can produce significantly increased contact stresses.

One important thing with the design of your stroking test rig is to make sure there is some relative rotation produced at the race/element interface at each load cycle, so that the load application points on the race surfaces are randomly distributed.

Lastly, you will probably want to minimize the dwell time of each load cycle. At 10 sec/cycle, you will only accumulate 360 load cycles per hour.

Good luck with your testing.
Terry

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