Cutting perspex

[Harry Bloomfield]

Avril, found a fancy outdoor battery clock, dumped, and took rather a fancy to having it in the garden. It fired up straight away on a new battery, but kept stopping which I worked out, was due to poor alignment of the hands. I sorted that, and ready to seal it back up, I dropped the glass lens, and broke it. I found some suitable thin plexiglass in the workshop, but every attempt to cut it into a circle, caused it to shatter. I tried jigsaws, various blades, handsaws, hacksaws, even fret saws. Nothing worked, without shattering the plexiglass. I even tried researching how on the internet, all said just use a fine blade..

Then I got the bright idea, of roughing it out, with a thin cutting blade in the grinder, finishing off with tidying the edge on the bench grinder, which worked a treat

 

[Old Salt]

Band saw with a ply backing if really thin.

 

[RandomGrinch]

That reminds me off this £800 mistake; the solution was similar to yours...

 

[Harry Bloomfield]

That reminds me off this £800 mistake; the solution was similar to yours...

My way was much quicker, cutting the bulk away first, then grinding the last bit.

 

[Harry Bloomfield]

Band saw with a ply backing if really thin.

I don't have one.

 

[Notch7]

It machines nicely with a router and a spiral bit

 

[foxhole]

They make jigsaw blades for Perspex . Has no teeth to cause shattering .