Rhino track failier?
 

My team purchased the Rhino Tracks from Andy-Mark this year, but after driving with them, the pulleys (am-3298) have started to fall apart. The plastic is chipping around the bearing. Is anyone else having similar issues?

Re: Rhino track failier?
 

sorry pic in not working

Re: Rhino track failier?
 

Try attaching the image to the post as an attachment, or linking it differently.

Re: Rhino track failier?
 

[IMG]blob:https%3A//mail.google.com/82aaea0c-d18f-40c0-8001-74d3ed496baf[/IMG]

Re: Rhino track failier?
 

copy this link into google without the [IMG]

Re: Rhino track failier?
 

Try again. Link does not work at all.

Re: Rhino track failier?
 

Upload your image to imgur.com and provide the link here. We're not logged into your Google account, so we can't see images in your email.

Re: Rhino track failier?
 

Re: Rhino track failier?
 

there it is, thanks

Re: Rhino track failier?
 

Did you use locate when you assembled them? Because that looks. Exactly. Like. When a student used locate on our wheels. One year some got. On the plastic and the locktite eats. A. Component of the plastic. And they fall. Apart

Re: Rhino track failier?
 

We just had the same breakage today. We are checking for more signs of weakness. Did you have more than one break??

Re: Rhino track failier?
 

these wheels where assembled with 6 bolts, 3 per side. we followed the manufactures construction. I think that it may come from a combination of over-tightening of the the track, or the force of the robot slamming into the ground after crossing a defense. We have broken 5 of these wheels so far. Is this happening for anyone else?
-thank you for any info you can give

Re: Rhino track failier?
 

We haven't done a lot of defense crossing yet. Today we were code testing when we found the broken piece. We weren't even sure where it came from until I read your question. Keep us posted :(

*update we found cracks on several wheels, some are in advanced stages but not broken yet. placement on the track was not a factor. we also do not believe it is a tension issue.

Re: Rhino track failier?
 

I agree with cmwilson13, it looks like you used superglue or Loctite on these.

Some plastics react badly (called crazing) to superglues (CAs in particular) and Loctite.

The bearings should be a slight press-fit into those pullys and should not need any glue. If they are a little loose, use a fender washer and spacer to keep them there.

Re: Rhino track failier?
 

no adhesives, only bolts. this is a very dense plastic, when it breaks it cracks it is a lot like obsidian, it forms very shiny surfaces