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post #1 of 7 (permalink) Old 09-21-2009, 08:54 PM Thread Starter
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Default Newbie here, with a question...

Just found this site. Nice! I am an intermediate woodworker. I need to route some 1/4" plexiglass. Any tips from the "pros"? What feeds, speeds and bit types to be successful without melting the plexi? Sorry if this has already been asked.

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post #2 of 7 (permalink) Old 09-21-2009, 09:20 PM
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Welcome,
Haven't routed a lot of Plexiglas, but have machined a lot of it. Been a while, but if I remember right had the mill set at about 13,000 for a 1/8” end mill. This was a O-flute spiral mill, single flute up cut. If you are feeding by hand, it will seem you are feeding fast. And you are, but let the bit do the work. We used a water-soluble coolant, Sorry I don’t remember the brand. I do remember we got it in 5 gal cans from our plastics supplier.
Try this site.
Onsrud Cutter - Plastic Routing

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Cut it twice, and it's still too short!
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post #3 of 7 (permalink) Old 09-21-2009, 09:50 PM
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Greetings Dave and welcome to the router forums.

Wisdom: Where experience and knowledge combine and become one.

"We are all one decision away from Stupid!!"

Lamentations 3:22-23

"How often we sacrifice the permanent plans of God on the altar of immediate solutions"

I have a very good memory, just short is all.
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post #4 of 7 (permalink) Old 09-21-2009, 10:01 PM
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Welcome to the RouterForums Dave.




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In woodworking there is no scrap, only firewood.



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post #5 of 7 (permalink) Old 09-22-2009, 07:37 PM Thread Starter
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Thanks for welcome guys! Well I did route the Plexiglas. Wasn't easy! Every speed I tried on my variable speed router would end up melting the Plexiglas onto the bit. Ended up breaking my 1/8" upcut spiral bit. So, went with a cheap two edge 1/4" that wouldn't clog up as much. If it did start to clog, you have to remove the sticky plastic fast before it hardens or else it is very difficult to remove from the bit. The trick ended being to take very light cuts and fast movement trough the Plexiglas, which would produce an acceptable edge. I think using a coolant would probably have been the answer, but I didn't want to deal with the mess.
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post #6 of 7 (permalink) Old 09-22-2009, 10:40 PM
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Welcome aboard
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post #7 of 7 (permalink) Old 09-23-2009, 02:12 AM
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Carefully blowtorch the routed edges and when you have the knack, it becomes smooth and polished.
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