needed some more big ball bearings, but a question for someone whose done this and lubed them.

Greetings all;

So 5.5 hours later if have two green PETG race ring pairs that use
crosman bb's for balls. For the output shaft of this drive, meaning the
potential load could run to a ton or so. 70mm ID, 53 bb's per bearing, I
intend to use two beside each other on the load end of the output shaft.

The bb's aren't exactly round and the plastic prints a bit lumpy, but I
think the lumps will go away once they are wrapped in alu that doesn't
have the elasticity, and that will mash the lumps down quite a bit.  Its
not like this is a high speed device anyway, with an estimated top speed
of 5 rpm.

But if it had some lube that was plastic compatible, it should last a bit
longer. And I've been told vegetable oils and greases are ok, but
petroleum stuff destroys PETG.

I have some crisco both liquid and solid at room temps, cooking stuff,
and some safflower oil, and some coconut oil.

So what is preferred?

Thanks for any advice.

Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to [hidden email]

On Friday 16 April 2021 18:44:50 nop head wrote:

> I think lithium grease is recommended for plastic.

I think the lithium would be ok, but isn't it carried in a petroleum
base? Further searhing the net, it seems to get an A+ rateing. I'll get
some tomorrow,  Thank you.

[...]

Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to [hidden email]

On everything plastic I use this:

https://www.amazon.com/gp/product/B0083R1FME/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

It is designed for the Nylon gears in a Kitchen-Aid or a food slicer.
Food grade too.


Regards, Jan

On 4/16/21 6:40 PM, Gene Heskett wrote:
> Greetings all;
>
> So 5.5 hours later if have two green PETG race ring pairs that use
> crosman bb's for balls. For the output shaft of this drive, meaning the
> potential load could run to a ton or so. 70mm ID, 53 bb's per bearing, I
> intend to use two beside each other on the load end of the output shaft.
>
> The bb's aren't exactly round and the plastic prints a bit lumpy, but I
> think the lumps will go away once they are wrapped in alu that doesn't
> have the elasticity, and that will mash the lumps down quite a bit.  Its
> not like this is a high speed device anyway, with an estimated top speed
> of 5 rpm.
>
> But if it had some lube that was plastic compatible, it should last a bit
> longer. And I've been told vegetable oils and greases are ok, but
> petroleum stuff destroys PETG.
>
> I have some crisco both liquid and solid at room temps, cooking stuff,
> and some safflower oil, and some coconut oil.
>
> So what is preferred?
>
> Thanks for any advice.
>
> Cheers, Gene Heskett
>


--
Jan Wieck
Postgres User since 1994
_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to [hidden email]

On Friday 16 April 2021 20:40:16 Daniel Shriver wrote:

> MoS2 (molybdenum disulfide) is also sometimes used as a lubricant, but
> again typically in a grease base.
>
I have some, both as pure powder, and in a heavy grease base you'll find
it in the drawers of anyone who has worn out the number of rifle barrels
I have at the rifle range, I am also a reloader, and have used up 4
barrels in old meat in the pot. Or AT&T as one of my boys calls it, cuz
it can reach out and touch something. It brought home a nice buck once
from 640 yards. But I haven't tried that again as it was not a quick
kill, no bullet expansion left at that distance so he stood there and
bled to death. He did die right where he was standing but it took too
long, not a humane kill. Lesson learned.

And today I read some warnings during my net searching about it getting
into the cracks and crannies in printed stuff and delaminating it
gradually.  Both that and the finely milled graphites carry the same
warnings, saying don't use. So I'll leave that in my reloading benches
drawer.

> Are you concerned that the grease will dissolve the plastic?

Yes.

Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to [hidden email]