Oddish question: Plastic cutting.

[Mercutio]

Assuming I wanted to make a fairly precise 3.5" hole in a faceplate that was a bit too thick for a stanley knife. Best methods folks? Drill and coping saw?

Bought a dremel a while back but I can't seem to find the right disk to do a good job on the cutting.

 

[~Divine~Wind~]

holesaw

As below tho watch the speeds for melting

 

[King Damager]

Yeah, I'd be going for a Drill and Coping Saw. Dremel will melt the plastic. Holesaw will work if you want it to be a round shape

kd

 

[tibble89]

There's some discs by dremel which are suppose to be just for plastic, although they look like normal ones, so not sure what the difference is. Product code is SC476 & will also need mandrel SC402

 

[King Damager]

To be honest, if there's corners in your cut, I'd probably still go for saw over dremel. Dremel is challenging to try and cut curves with.

kd

 

[Mercutio]

Ahhh to make it clear (sorry) it's essentially a 3.5" external drive shaped hole in a plastic cover (so square). I re-read my question and it's not really that clear.

Basically a letterbox cut.

 

[wazza300]

drill a hole big enough to fit a jigsaw blade into,drill halfway between the edges then cut towards each corner,thus giving you a nice sharp corner

 

[Bubo]

Job for a router? Might be easier to get a dead straight cut this way.

 

[King Damager]

If you have a Dremel and the right cutting discs you might as well do that, but on the other hand if you have a Drill and a coping saw, that'll do fine also. Basically whichever tools you have, use those

kd