saw blades for acrylic/perspex

Hi All



I've recently acquired a table saw and am looking at getting a blade for cutting acrylic. I've read that high-tooth count blades with zero degree rake are the go, or Triple Chip Grind blades with zero rake.

Have a couple of questions:

Does anyone know where to easily get an inexpensive blade for this?

Can I use negative raked blades?


Cheers


edit: 235mm saw with 25mm arbor...

 

One of these?

https://www.masters.com.au/product/900050889/bosch-multi-material-circular-saw-blade-60t-210mm

I use the 184mm version for cutting aluminium, just cut a piece of offcut perspex and the cut quality was better than the suppliers cut, this was in a drop saw.

 

Champion! thanks mate, I didn't think to try masters..

 

ooooooh you have cnc routers....

 

More teeth per better will give a finer cut with less variation/grooves - more important is speed of cut (If you think about it, this is all more TPI does anyway, notwithstanding bluntenning of the cutting surfaces)

Lubrication will make a massive difference also...... before you cut, push a bar of soap against the blade, I've found Salvol works well on our CNC Spiral cutters when cutting Perspex - lasts a long time surprisingly too on each cut

 

From the states thru ebay, 2-3 blades for the same price as 1 one here.

Tradetools blades arent too bad depending on the blade $$$ wise.

Most hdd sell wax bars to rub on blades when cutting non timber materials

 

Silicone spray is another thing you can use on the blade, works well

 

I've cut a bit of perspex recently. Had never done so before, so a bit of experimentation was in order

-Angle grinder with metal cutting disk. Would you believe it, this was horrible. Melted more than cut. Do not do this

-Circular saw: much better- this is what I'd use again if I didn't have the proper tools

-Jigsaw: useless (mind you, it was a cheap and nasty jigsaw and it was fairly thick perspex).

Great points from Meth about lubrication, wish I'd thought of that at the time.

 

Best (cheapo, non-specialised) thing to cut perspex is a standard hacksaw.

 

That may be true, but for what I was doing it would have taken ages:

-25mm thick perspex
-Cutting a large (2m x 1.5m) chunk out of a much larger sheet

 

You'd be surprised how good a finish you can get with a friction disc (angle grinder disc) with a little lube/ coolant. I've used water, oil, WD40 - all work well.

2.

 

Depends on the cutting disc, inox 1.0mm ultra cut disc make easy work of it.

Like cutting anything let the disc do the work not your arm.
If using a jigsaw just make sure your blade is very very fine.

Lots of cutting ill just use the makita cold cut saw with a fine +60-80tooth metal blade.

Better off getting those multi material/ferrous metal blades from the states.

2 for the price of 1 here