Contact US

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.

Students Click Here

dryer roll bearing in paper making machine

dryer roll bearing in paper making machine

dryer roll bearing in paper making machine

We have problem with dryer roll bearing in paper  making machine that inner ring of the bearing cracks in very short period. We found some info that they warm up the roll by 2-4 hours.So we would like to know that if warming up period is necessary and long enough likes 4 hours.

RE: dryer roll bearing in paper making machine


I am not a bearing expert. But I have been in (listened to) discussions about how to size the shaft and bearing. It is about the shaft being hollow (for the steam) and that normal design rules cannot be used because the shaft is not solid - and thus shall have a tighter fit (yields more) than a solid shaft shall have.

If this design rule is applied to a non-hollow shaft, chances are that the inner ring cracks. Or if it is applied wrongly on a hollow shaft. In such a case, the warming up period does not have much influence on the outcome.

Some SKF offices have very good guys that understand this sort of problem. But, as always, you have to find the right guy.

Gunnar Englund
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

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! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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