×
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

loctite expansion when curing.

loctite expansion when curing.

loctite expansion when curing.

(OP)
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)

thanks

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!


Resources