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Unread 06-02-2016, 12:25
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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?
Last edited by The Ginger : 06-02-2016 at 13:51.
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Unread 06-02-2016, 12:29
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Re: Rhino track failier?
sorry pic in not working
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Unread 06-02-2016, 13:09
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Re: Rhino track failier?
Try attaching the image to the post as an attachment, or linking it differently.
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Unread 06-02-2016, 13:30
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Re: Rhino track failier?
[IMG]blob:https%3A//mail.google.com/82aaea0c-d18f-40c0-8001-74d3ed496baf[/IMG]
Last edited by The Ginger : 06-02-2016 at 13:49. Reason: pic to big
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Unread 06-02-2016, 13:51
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Re: Rhino track failier?
copy this link into google without the [IMG]
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Unread 06-02-2016, 13:56
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Re: Rhino track failier?
Try again. Link does not work at all.
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Unread 06-02-2016, 13:59
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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.
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Unread 06-02-2016, 14:34
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Re: Rhino track failier?
http://imgur.com/kCf1fbu
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Unread 06-02-2016, 14:35
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Re: Rhino track failier?
there it is, thanks
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Unread 06-02-2016, 14:38
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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
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Unread 06-02-2016, 15:37
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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??
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Unread 06-02-2016, 15:44
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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
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Unread 06-02-2016, 16:00
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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.
Last edited by callmecairo : 06-02-2016 at 16:08.
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Unread 06-02-2016, 16:13
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Re: Rhino track failier?
Quote:
Originally Posted by The Ginger View Post
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.
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Unread 06-02-2016, 16:26
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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
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