<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 10pt;
font-family:Tahoma
}
--></style>
</head>
<body class='hmmessage'>
Not a clue about where in Ottawa but I'll give you some advice on milling plastics to make the choice easier... <br>Milling plastic is often comparable to steel, low speed, coolant, hog it hard...<br>Some plastics are real nasty to machine, too fast on the cutter and they burn or form astro turf... <br><br>Some forms of Nylon fall into this category ... I've had good luck with the Nylatron series (IIRC 908 & 808)...<br>But nylon is dimensionally unstable with respect to moisture if that applies to you app... <br>UHMWPE is generally better for milling, as well as harder, slipperier and more expensive... <br><br>The cheapest I've found is phenolic which doesn't have a great finish after milling and smells a bit if it gets too warm... <br>The pump body here <a href="http://krazatchu.ca/?page_id=468">http://krazatchu.ca/?page_id=468</a> is phenolic, the wheel is 908....<br><br>There are lots of good charts online for deciding on what plastic to use ...<br>Here's one <a href="http://www.theplasticshop.co.uk/plastic_technical_data_sheets/engineering_plastics_machining_guide.pdf">http://www.theplasticshop.co.uk/plastic_technical_data_sheets/engineering_plastics_machining_guide.pdf</a><br><br>And remember to use a sharp end mill, I used to keep one for plastic and wood only, it makes a big difference....<br><br>Michael<br><br><br><hr id="stopSpelling">From: darcy@siteware.com<br>Date: Wed, 10 Nov 2010 12:01:29 -0500<br>To: ORE_bits@yahoogroups.com; lab@artengine.ca<br>Subject: [Lab] plastics source<br><br>Where to buy good material for making stuff on a milling machine?<div><br></div><div>I want to make my mounts and was thinking that some 3/8 or 1/4 inch plastic sheet would be cool.<br clear="all"><br><br>
</div>
<br>_______________________________________________
Lab mailing list
Lab@artengine.ca
http://artengine.ca/mailman/listinfo/lab </body>
</html>