Drilling perspex?

[HenryDorsetCase]

...I worked on a job where the only tools on the job site were a big hammer, a blunt rusty saw and a 4 gallon bucket of sperm oil...everything always seemed to fuck up but we never had to use them tools we had...thank fuck...

Well at least if the power went out you had some good quality, low smoke oil for your lamps

[nodrog:Me]

Fixed it . . . .

Never argue engineering with a qualified concert pianist.

[swarfie]

Never argue engineering with a qualified concert penis.

Fixed that for ya, you're welcome

[Askor]

Similar to drilling brass, you need to 'brass off' the drill bit so it doesn't self-feed and fuck shit up. Google it

I also find that having a piece of scrap perspex underneath the piece you're drilling helps - as the drill breaks through it wont grip and crack the plastic. Make sure the work piece is clamped down too.

[HenryDorsetCase]

Similar to drilling brass, you need to 'brass off' the drill bit so it doesn't self-feed and fuck shit up. Google it

.

my mother used to say she was "brassed off" when she was minorly annoyed. I have never thought about its provenance before that.

[jellywrestler]

my mother used to say she was "brassed off" when she was minorly annoyed. I have never thought about its provenance before that.

sure it wasn't Bras off, maybe a little bit of annoyance got her girl gravy going and she wanted to swing those puppies in the breeze a little and moisten her own stench trench?
the secrets of a closet S & M queen maybe?

[djsubjective]

I used to be a glazier, and did a lot of perspex/polycarb work. We used wood drill bits, as they arew like a hole saw and dont put pressure on the material being drilled.

Slow speed is the way to go. Also with cutting, we used wood blades for the jigsaw, and just go slow, if you go too fast it can crack, and it can also be too hot and the cut re-welds itself behind the blade.

[husaberg]

http://www.instructables.com/id/Fool...ylic/?ALLSTEPS

[malcy25]

Believe or not but old dull drill bits are better than brand new sharp drill bits on acrylics.

yep, my best experience - I usually given them a bit extra on the concrete floor....and slow speed.

[MENTAL490]

tried it many a time and have a new faring blank to cut and fit this time. common old hss drills have a sttep angle on them, I beleive there are other drill bits more suitable for this job, time to discuss folks, and who stocks them.

to drill perspex use a sheet metal ground drill. they have like a center bit then its ground out so the outer diameter of the drill hits first, it works a treat oh and 0 rake like brass drills