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Old 02-10-2007   #1 (permalink)
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Any ideas what plastic this stuff is?

Has anyone here got any idea what the below material is? It's referred to simply as "Machining Plastic" in the ad and sounds like it could be good stuff!

It has useful properties and looks to be easy to machine too! I wondered if it'd be good for making parts for 1/12 R/C ministock, bumpers etc. I'd like to get hold of some but the Supplier isn't replying to my daft emails! If I could get a 5 or 6mm sheet it could be fun to have a play with. The site I found the description only stocks it in 25mm thick sheet.


Machining Plastic

This is a rigid plastic with excellent machining properties. It has very good resilience and dimensional stability. It also has good sliding wear resistance making it excellent for bearing surfaces, and good electrical insulating properties making it ideal for use in all sorts of electronics projects. Additionally it is physiologically inert which means that it can be used for food projects such as moulds for confectionery and biscuits.

Standard colours are white and black. In appearance it is similar to nylon, but with a slightly less shiny surface. It machines superbly using standard HSS or carbide tooling, without the melting and stringing problems associated with most plastic materials. It can be finished to a high quality and will take most paint finishes readily.

Although significantly more expensive than, say modelling foam, this material is perfect for most 3D manufacturing projects that need a structural outcome. Ideal for one off GCSE and A level projects for example.
Available in 25mm thick sheets - colour white (W) or black (B). *When ordering please specify the colour required where prompted.

Nominal size: 610 x 500mm.
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Old 03-10-2007   #2 (permalink)
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Hi Alan,
I could be any one of the thousands of different plastics on the market today, all saying it is the best thing since sliced bread.
By the properties you mention it sounds like DuPont's Delrin (you should be able to find it on the web), which has been around for a long time and is used in workshops for general purpose plastic bits. I use the rod all the time for making spacers and non critical bearings. I tend to machine it with HSS tooling rather than carbide, as carbide is moulded and just doesn't have a sharp enough edge for clean cutting.
It is fairly expensive, for a 12" by 12" sheet of 3/8" expect to pay over £15.
You might be better off going for plain nylon.
Hope this helps.

John

Last edited by bogstandard; 03-10-2007 at 11:58.. Reason: Giving more info
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Old 03-10-2007   #3 (permalink)
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sounds like acetal, to me, especially the colour and characteristics
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