wheel thread kits

[Greg Needel]

i have heard that the weel hub kits break and I was wondering what part breaks on them and has anyone found a way to reinforce them to make them stronger?
greg

[Patrick Wang]

We used the wheel hub kits during last year's competition and have never had a problem with them breaking.

[Anton Abaya]

our robot didnt break with those wheel hubs....see pic:

http://www.chiefdelphi.com/forums/pictures.php?s=&action=single&picid=328&direction=DESC&sort=date&perrow=4&trows=3

-anton

[Eric Reed]

Don't use loktite! The only time the hubs failed for us was when the loktite melted them.

Eric.

[Andrew Dahl]

we broke 2 just fooling around driving the robot-
of course our drive train last year created a ton of side laod

I will load our aluminun whell hubs to the white papers soon

dahl]
team 497

[Greg Needel]

Thanks all for your help

greg

[ErikJusten]

We had one or two of these hubs break on us. We did use loctite, but I'm not completely satisfied that this is why they failed. For us any way the failure occurred parallel with the shaft, in between two spokes. If you look closely (well, you don't have to look that closely - it's pretty obvious) there is a gap between the two halves of the hub in between the two spokes. Our guess was that if you tighten the sprocket (or whatever) down too much, you break the plastic (since you are trying to pull the two halves of the hub together and eliminate that gap, which you can't do). So.... we put some pieces of polycarbonate in that gap (triangular shaped pieces w/ a hole in the bottom for a screw) to "idiot" proof it - now we can no longer tighten the hubs too much. We'll probably do something similar this year. Now maybe loctite weakened the material, but the nature of the failure really made me believe there was something else at work....