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

loctite expansion when curing.

loctite expansion when curing.

loctite expansion when curing.

On another board a fellow describes reliable but 2nd hand info that folks working on aluminum case engines might use Red Loctite to retain a big (3 inch diameter) ball or roller bearing OD, if it is found to be a bit loose, and after curing, the bearing binds up.

One prevalent theory is the Loctite cures and actually compresses the bearing outer race enough to bind up.

Before I ask Loctite, does anyone have any experience with a similar phenomenon?

I think it would take a bunch of force to squeeze all the clearance out of a bearing.

(My whole cloth theory is, //if// they warm the case to hasten the cure, the loctite fill the larger space created in the warm case, and upon cooling the case expansion has a head start on being even smaller than a properly sized aluminum bore would have been. Or, possible contribution when it grabs the bearing in a 'tipped" orientation that binds the bearing when the case cools down)


Dan T

RE: loctite expansion when curing.

Loctite makes a product specifically for retaining bearings.

So there might be a reason to not use the bolt flavor for that application.

RE: loctite expansion when curing.

There are some rare polymers that expand upon cure (not just foam-up). I'm not aware of any that are actually commercial.

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


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