What kind of saw should use on plexi-glass

[Yennek]

What kind of saw would cut plexi-glass most effiently? If you guys could help me out that would be great! Thanks!
-Yennek

[freddy]

table saw would work. plywood blade turning backwards,

[VASandy]

I used a band saw. Feed the workpiece in slowly and consistently. It worked fine. There was no melting of the edge, and it was relatively smooth. Final smoothing was done w/wet-dry sandpaper (400grit, I think).

[RiR]

I've used VASandy's method & can recomend it. For shapes, figures, circular cuts etc, a 125mm angle grinder with a cutting blade 1.6mm or 1mm , for stainless steel, works surprisingly well. It's as if the little bit of melting helps things around, and if you tidy things up ,the way Sandy reccomends, then you get a real neat job. Even bending and rolling can be done if you warm the plexiglass up in very hot water, or carefully with a hot air blower.
Some poor qualities aren't very good to work with, but you know this after the first cut.

[garager]

agreed bandsaw, works great

[papadan]

Larger squared pieces are quickly and accurately cut on the tablesaw. Smal or curved pieces use the bandsaw.

[Orange Apron]

Ive never done anything special with the blade, just used a regular carbide blade that was already in the saw. You just want to hold the piece down and if its really thin make sure it doesnt slip under your fence

[Gofor]

If its a straight cut, and it is truly plexiglas (poly acrylate, not polycarbonate or polythylene) you can score both sides fairly deeply using a straight edge and a machinist scripe or kraft knife and snap it off. I have done this on plexiglas up to 1/4" thick. The trick is to score it well on both sides and completely to both ends, lay the score line on the sharp edge of a hard board or table, and clamp it with a board over it on the table side of the score. If the piece is long, clamp two boards above and below it about 1/4" away from the score on the overhang side to get even pressure on it when you snap it.
Plexiglas is more brittle than poly carbonate, so has more of a tendency to chip or crack if you get it pinched or if it vibrates when cutting it. Carbide blades work if you make sure you feed it slow and straight. A bandsaw works good but something like a scroll saw that moves up and down is difficult to use. If you try a scroll saw, put a piece of wood over the top to stop the vibration, or sandwich it between two pieces. A jigsaw will require sandwiching.
A blow torch or LP torch or hi-temp heat gun with a heat spreader can be played over the edge to get it to melt smooth and clear. If you cut it with a saw, sand the saw marks out first.
This may work on Lexan (polycarbonate) but I have not tried it. Lexan is easier to cut because it is not as brittle.

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