Cut Along Dotted Line
I have decided, for the time being, to offer to cut out portafilters for my friends and family. It is quite expensive to buy the pre cut ones, and there is usually a good charge for having someone do it in a metal shop on a lathe. So I’m doing it, for the time being, for the shear joy of shaping metal. I found a hole saw and a file quite sufficient for the job. With a hand held drill, some steady hand holding, (here is the hard part) and a little finesse with a Bastard file, a fine looking finished edge can be achieved.
2 1/4" hole saw, usually for door knob installation
Keep the RPM's low for better cutting.
Using a flat file, remove the burr and feathered edge for a smooth bottom.
Now all you need is the GB-5 from which you can watch ripples of dark brown, honey textured espresso drip viscously form you newly hollowed out hunk of brass.
Hey Phil… I’ll bring one for you to practice on (wink).
Phil, you’re a bad ass!!! Your lab in DC had a cutaway — didn’t figure it was you doing the cutting. How hard is this? I’m now managing a coffee shop on James Madison University’s campus at night, and it would be fun to have some espresso excitement in the shop.