David Jenkins
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| posted on 2/11/08 at 02:32 PM |
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Machinable plastic?
I've got a little project in mind, and it requires some hard plastic that's easy to machine in a lathe and drill press. In the past
I've bought some black nylon from a local supplier, but that's been a PITA to machine as the material tends to move away from the cutting
tool and form a ridge that moves just in front of the cut. I've found it very hard to get a nice finish with nylon.
Can anyone suggest an alternative? I'm looking for something about 100mm in diameter, fairly tough, preferably black, dark grey or silver, and
available at a sensible price.
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triumphdave
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| posted on 2/11/08 at 02:55 PM |
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Nylon is quite nice to machine,but tool needs to be sharp with a good rake angle.Acetal machines well also.
If you always do what you have always done you will always get what you have always got
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jambojeef
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| posted on 2/11/08 at 03:07 PM |
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I machined a few bits from Delrin.
Turns well, firm - not sure of the shore rating but i think theres a range available.
Geoff
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Ivan
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| posted on 2/11/08 at 03:13 PM |
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You need a support behind the piece moving just ahead of the cutting tool as well if the piece flexis at all.
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paulf
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| posted on 2/11/08 at 09:55 PM |
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Acetal or trade name Delrin is a good material to machine it is more like brass to machine wheras nylon tends to be softer and binds on drill etc but
is ok with sharp tools.
Paul
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iank
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| posted on 2/11/08 at 10:09 PM |
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Have you tried putting it in the freezer for a couple of hours before turning?
Machines much better if it is really cold, as do a lot of the other plastics. Worth having a go if you've already got some in the right
size/colour.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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MikeRJ
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| posted on 3/11/08 at 10:01 AM |
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Tufnol (phenolic/cotton composite) is very easy to machine and is very tough, but doesn't meet your colour requirements.
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