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Old 10-22-2010, 10:36 PM
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Default Plexiglass /Lexan boxes

How thick would Plexi or Lexan have to be,to at least equal the density/strength of 3/4 MDF?
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Old 10-22-2010, 10:43 PM
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You can use a thinner lexan to be equal to mdf. Although I use .93" lexan. There is a special glue if you build a box using ONLY lexan. Lexan to mdf just silicone.
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Old 10-22-2010, 10:50 PM
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Is Lexan preferred over Plexi?
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Old 10-22-2010, 10:55 PM
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How does acrylic play up to plexi and lexan?
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Old 10-22-2010, 10:59 PM
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Plexi is a brand, like Kleenex is with tissues. Acrylic is the material. IIRC, Lexan is much preferred to Acrylic, due to better strength properties. But, it is also much more expensive.
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Old 10-22-2010, 11:06 PM
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Can these be cut easily like MDF,or do you need special tools,and say a prayer before cutting to avoid cracks?
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Old 10-22-2010, 11:19 PM
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I use a fine tooth blade to cut plexiglass at my work. it sands down easily like mdf does with a belt sander to get a nice edege on it - if you are janky with the cut -

have to realley abuse it to get it to crack when cutting. actually - ive only cracked a piece trying to run a screw in a hole I drilled too small for the size screw I was using. if you plan to screw in to the plexi - you gota use the right size drill bit - and counter sink if your using counter sink style screw heads
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Old 10-22-2010, 11:48 PM
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yes, acrylic is plexi, whereas polycarbonate is lexan.

both require a high tooth count, carbide tipped blade in order to cut without chipping the adjascent surface/s,... Best method I've found in cutting either material is to score the surface on both sides first with a max depth of 1/32"-1/16" in order to relieve the edge of "lift" that is inherent with cutting any material when a saw has a downward/upward stroke against the face,... make multiple passes after while increasing depth 1/8"-1/4" for each pass and you should be fine.

also, lexan is 10 times harder than glass, but scratches very easily and is susceptible to discoloration (yellowing) from u/v light

plexi is only 4 times harder than glass, but is much more scratch-resistent than lexan and doesn't discolor.
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