proper material
proper material
(OP)
I need a bearing/wiper material to use on a slow motion sliding polished chrome rod think linear motion. short throw Like three inches. I would like the material to be castable at low temps and slide free of friction within reason. Fairly stiff as it would have a max 50 pound load on each bearing.
Any suggestions?
Any suggestions?






RE: proper material
I am presuming you are using the word castable in an appropriate manner and you have correctly rejected other possibilities for method of manufacture.
Regards
Pat
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RE: proper material
RE: proper material
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
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RE: proper material
RE: proper material
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
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for site rules
RE: proper material
I could cast directly into a clay mould. I know! Which plastic right?
I don't know but I think it's a smooth on product.
I'm going to think about doing it like that. I have been looking for a project for that plastic for a while now.
Thanks for your help. It really was helpful and actually learned a couple new terms to research.
RE: proper material
{
If you support the guide rods in ball bearings and drive them with a chain or belt so that they are always slowly rotating, the stick/slip problem should be greatly reduced, regardless of bushing material.
... at the expense of some added complexity, I admit.
}
If you have access to a lathe, you can buy Delrin rounds and machine your own bushings to whatever spec you need. PU is indeed castable, but I think you will be disappointed at the amount of graphite, or oil, or grease, that's required to keep it slippery.
Mike Halloran
Pembroke Pines, FL, USA
RE: proper material
Oak also makes a decent bearing material (relative to no bearing at all) and was used for centuries as such. Lignum Vitae is better, but a little more difficult to come across at your local lumber yard. The guy behind the counter will most likely have no idea what you're talking about.
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: proper material
Just sayin......cost is relavant and if your dinkin in the garage with other expensive tools that crap can add up. Sides, I kinda get a kick out of poorgoying parts and tools which is a good thing because I have had less than stellar results on occasion.
RE: proper material