|
Posted by Karl Townsend on October 24, 2008, 9:21 am
Please log in for more thread options
I need to make some new idler wheels for my wire EDM. The material is a very
hard black plastic. Maybe the same stuff you see on a car electrical
distributor. It needs to be non-conductive and be able to have a light press
fit for a ball bearing.
Can somebody give me a material name and source to order?
Karl
|
|
Posted by K Ludger on October 24, 2008, 9:43 am
Please log in for more thread options
>I need to make some new idler wheels for my wire EDM. The material is a
>very hard black plastic. Maybe the same stuff you see on a car electrical
>distributor. It needs to be non-conductive and be able to have a light
>press fit for a ball bearing.
>
> Can somebody give me a material name and source to order?
>
> Karl
>
>
Its not black, but maybe something like Tufnol. Maybe have a look at
Radiospares in their engineering materials section
http://www.rs-components.com/index.html
|
|
Posted by Ecnerwal on October 24, 2008, 11:18 am
Please log in for more thread options
Bakelite? That's a likely for the car distributor, and is a high temp
and hard black plastic.
Phenolic might work well, but it's not black. It is very hard and a good
insulator, based on several years I spent building plasma physics
machines.
Micarta might also work, depending. I guess it's technically a form of
phenolic.
--
Cats, coffee, chocolate...vices to live by
|
|
Posted by on October 24, 2008, 11:33 am
Please log in for more thread options wrote:
> Bakelite? That's a likely for the car distributor, and is a high temp
> and hard black plastic.
>
> Phenolic might work well, but it's not black. It is very hard and a good
> insulator, based on several years I spent building plasma physics
> machines.
>
> Micarta might also work, depending. I guess it's technically a form of
> phenolic.
>
> --
> Cats, coffee, chocolate...vices to live by
Probably any of the THERMOSET plastics would work as long as they have
non-conductive fillers. Pick one with a high hardness,
Personally I like the idea of a metallic rim carrying the wire; it is
more precise and resists wear and tear better. An insulating bushing
containing the bearings would keep the magic smoke in.
Wolfgang
|
|
Posted by Ed Huntress on October 24, 2008, 11:49 am
Please log in for more thread options
>
> Bakelite? That's a likely for the car distributor, and is a high temp
> and hard black plastic.
>
> Phenolic might work well, but it's not black. It is very hard and a good
> insulator, based on several years I spent building plasma physics
> machines.
Bakelite is phenolic resin and a wood-flour filler. It's probably what the
originals were made of. It can be colored black, or it can be dark brown, as
I'm sure you know.
>
> Micarta might also work, depending. I guess it's technically a form of
> phenolic.
>
> --
> Cats, coffee, chocolate...vices to live by
|
| Similar Threads | Posted | | Poly ethelene (black plastic" clamps. How are they used. | December 21, 2009, 2:15 pm |
| Sulphur Black 2BR 200%,Sulphur Black B 200%,Solubilised Sulphur Black ,Liquid Sulphur Black | November 12, 2008, 4:24 am |
| Nice plastic to machine -- plastic cutting board | June 21, 2007, 10:24 pm |
| Re: OT: The Black Knight | October 25, 2006, 5:48 am |
| Re: OT: The Black Knight | October 25, 2006, 8:44 pm |
| very black anodizing | November 4, 2006, 12:10 am |
| Black Max WANTED | December 21, 2006, 10:01 pm |
| Black Oxide? | January 15, 2009, 10:54 am |
| Black vs Galvanized Pipe? | December 3, 2006, 7:42 pm |
| HSS drills - black or silver? | January 6, 2007, 12:53 am |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
>very hard black plastic. Maybe the same stuff you see on a car electrical
>distributor. It needs to be non-conductive and be able to have a light
>press fit for a ball bearing.
>
> Can somebody give me a material name and source to order?
>
> Karl
>
>