Quote Originally Posted by Boyan Silyavski View Post
Its a repeated question when somebody starts.

The answer:

Sizes:

you need 3 major sizes:

3mm or/and 1/8"

6mm or/and 1/4"

12mm or/and 1/2"

......
Wow, thanks for that. This needs to be a sticky!

Its a great place to start.

I did forget to mention this is just a "hobby" machine, alo a learning machine in advance of my friend ordering a industrial capacity one.

The only Collect i currently have is 6mm (they are expensive on the Kress), I am looking into getting a 3mm one too.
I bought a whole load of Carbide and HSS bits of ebay (cheap and cheerful with a range of sizes) to get me going.

Even with the 2 flute, I have already broken 3 x 3 mm bits (once out of stupidity, moving the head whilst i was aligning the bit to a whole).

I did find swapping the 4 flute to 2 flute made a massive cutting difference.
Someone mentioned getting a single flute for acrylic?

I am still getting a bit of a problem with melted acrylic piling up around the bit, this then suddenly grows as more is backed up.

Is there a correlation between temperature of the bit vs the build up of melted material around the bit?

As for sharpening, i think i will avoid that for now, this machine is a steep enough learning curve for now! lol

Thanks again, this is awesome.