ball bearings....

[Dr Fritz]

could we use ball bearings on the mini bot? yes i have looked at <R92> over and over, but what do you guys think something like a ball bearing made out of material we can use.

[GaryVoshol]

Make'm out of polycarb or aluminum - go for it. But you have to make the bearings; those materials are "raw" materials allowed only.

[Dr Fritz]

why polycar or aluminum why not delrin?

[phoenix_fire]

Originally Posted by Dr Fritz

why polycar or aluminum why not delrin?

Delrin isn't allowed by <R92>. As stated, your ball bearings have to be manufactured by materials allowed in <R92>.

[Dr Fritz]

thats what i thought thanks guys

[Dr Fritz]

so what about PVC does PVC come in plastic balls or pellets

[GaryVoshol]

Originally Posted by Dr Fritz

so what about PVC does PVC come in plastic balls or pellets

Doesn't matter if it does or doesn't. <R92> only allows PVC pipe or fittings.

I misspoke above - you can use polycarbonate in any form, whether it's something you fabricate or something you buy.

Aluminum, you can only use things you make out of raw stock, or Tetrix parts.

[Chris is me]

Originally Posted by GaryVoshol

Make'm out of polycarb or aluminum - go for it. But you have to make the bearings; those materials are "raw" materials allowed only.

Polycarbonate is by no means required to be in raw material form - that restriction only applies to aluminium.

[EricH]

Originally Posted by Dr Fritz

so what about PVC does PVC come in plastic balls or pellets

Not legal either--the only PVC allowed is in pipe or fitting form.

[Dr Fritz]

that is what I thought ok, I was not sure if there was anything else I could do to them. what about using the PVC as a roller part its still in pipe form?

[GaryVoshol]

Originally Posted by Dr Fritz

what about using the PVC as a roller part its still in pipe form?

It doesn't have to be used in pipe form - you can cut it or do whatever with it. You can only buy PVC in the form of pipe or fittings though, to stay in compliance with <R92>.

[Dr Fritz]

um can I possibly get a direct answer with this?

[Al Skierkiewicz]

Doc,
<R92> The following items are the only permitted materials for use on the MINIBOTS:
A. TETRIX components that are not in violation of any other rules, (Tetrix components are listed in Approved Tetrix Parts at www.usfirst.org/frc/competitionmanual),

F. Polycarbonate,
G. Polycarbonate glue,
Q. PVC or CPVC pipe and fittings,
R. PVC cement or cleaner

Yes you may use pipe as a roller. The Tetrix allowed parts list has one type of ball bearing that is legal for your use and one sleeve bearing.

[Dr Fritz]

i know that but can i modify my PVC pipe into something that's not a pipe

[Al Skierkiewicz]

<R92> The following items are the only permitted materials for use on the MINIBOTS:
If it started life as a PVC pipe and an inspector can tell that it's heritage is traceable to a PVC pipe then it may be used in a modified state.