Cutting plexiglass - Page 2 - Router Forums
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post #11 of 21 (permalink) Old 11-12-2007, 02:48 PM
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I prefer the router myself but, there are many ways to cut "plexi-glass".

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post #12 of 21 (permalink) Old 12-07-2007, 12:49 PM
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Wow an old thread,

Most of the time I bought Acrylic (Plexi Glass) or Polycarbonate (Lexan) the plastic supply house cut it on a table saw. However the coolest way to cut either material was when I was working for a Laser & Water Jet place where we were cutting it with a computer controled machine that could slice and dice a 4x8 sheet into just about any shape imaginable in minutes. We cut everything from 1/4" high letters to as large as 4' ones for outdoor advertising along with artsy type stuff like parts for mobiles out of colored sheet. Best part with the laser cutting there is little or no post cutting finish to do the edges come out clear and smooth. I still have a letter stand I made (goverment job) that the base is a blank check made of 3/8" clear with lettering cut through, and three slotted uprights to divide the bills, letters etc. also with cutout lettering in opaque blue 1/8 sheet. I also made a over the sink cutting board out of 1/2" that fit into the rim of the stainless sink and has a cutout for running the water through.

I have to think those router table inserts and clear bases are probably laser cut unless they are custom molded. Pretty pricey for one or two pieces with set-up fees but if you need 25 or so pieces cut it would be worth looking into. Alas I no longer work there or I know I would be making some custom base and ski attachments.

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post #13 of 21 (permalink) Old 12-11-2007, 06:20 AM
 
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Hey Bob, Yeah if you look at the teeth on the blade they lean back which is the negative rake. It won't grab and pull so much in plastics or metal. It just depends on how much cutting someone has to do and if they want to invest the money.
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post #14 of 21 (permalink) Old 12-15-2007, 07:07 PM
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Will cutting acrylic be the same rules as plexiglass?
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post #15 of 21 (permalink) Old 12-15-2007, 07:35 PM
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Hi George

Yep, the same and if you want a smooth cut off edge on wood give the Freud blade a try out...smooooooooooth without any fuzz so to speak..I sometimes rip small parts with it and I like the long scraps that come off the wood no other blade I have will do that ...almost like using a hand plane on it ...

Here's just one more tip, pickup a can of AceTone from HD and wipe the edge of the plastic with it , it will melt the edge just a bit and give it a nice clear edge..

http://en.wikipedia.org/wiki/Acetone
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Will cutting acrylic be the same rules as plexiglass?
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post #16 of 21 (permalink) Old 12-16-2007, 09:57 AM
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Default Cutting plexiglass

For large pieces and straight cuts, I sandwich the plexi between two 1/8" pieces of masonite(hardboard) and cut it with my table saw or mitersaw. . If I am cutting shapes, I place masking tape or duct tape on both sides of the cut and use my scroll saw.
Here is a project that I cut from mirrored plexi.

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post #17 of 21 (permalink) Old 12-17-2007, 04:29 PM
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Thanks guys..Bob, what Freud blade are you referring to?
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post #18 of 21 (permalink) Old 12-17-2007, 04:53 PM
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Hi George

This one ▼

http://www.amazon.com/D1080N-Diablo-...883101&sr=1-28

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post #19 of 21 (permalink) Old 12-18-2007, 10:39 AM
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I've always used tape to keep any melt back off the work. bob, does that Freud blade cut such that you don't need the tape?
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post #20 of 21 (permalink) Old 12-18-2007, 10:55 AM
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Hi jjciesla


"does that Freud blade cut such that you don't need the tape?"

No tape needed,, it's the feed rate that will give you the over hang, the blade will talk to you, go as fast as the saw will let you,,,heat = melt..

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I've always used tape to keep any melt back off the work. bob, does that Freud blade cut such that you don't need the tape?
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