Domestic coffee grinders come in two basic sub types, blade and burr. The burr type grinders are supposed to supply a consistent coffee particle size, but they don't. They do a good job of supplying a consistent upper limit on particle size, but they also create smaller, powdered coffee that gums up my grinder and needs cleaning every now and then.
Part of the problem with these grinders is they seem to run on small motors that rely on speed, you can hear the grinder slow down/speed up as more/less beans drop into the blades. This is both inconsistent, because some beans are ground more slowly, and others smashed hard because the blades have chance to spin up to a higher speed. It's also very noisy for a piece of equipment frequently used 1st thing in the morning. Burr grinders also dull over time, making them less good and more noisy.
So, no blades, no high speed motors. We will start with a massively over-spec motor that makes a reassuring quiet hum when turned on. Like a lathe. Through reduction gears, this motor will drive two smooth rollers. These should be quite large diameter, 6" or so, so that the angle is gentle, stopping the beans just bouncing up off the smooth surface.
We feed in beans, they are crushed quietly and efficiently to a size specified by the gap width between the rotors. There should be a hand guard because of the aforementioned over spec motor.-- bs0u0155, Feb 07 2022 Option 2 https://www.google....A8&bih=979&biw=1920Might work better than rollers [neutrinos_shadow, Feb 07 2022] Progress in Gas Turbine Performance https://www.intechopen.com/chapters/45114The heat transfer efficiency of this stainless steel regenerator is 80-90%... Its noise level is estimated at 65 dB. [Voice, Feb 09 2022] cartridge start https://www.youtube...watch?v=vb0-br7hTw0This machine has a handy belt drive drum to attach the grinder to. [pocmloc, Feb 09 2022] //The gearbox croaked on mine//
Sintered metal parts, minimal possible material I'll bet. That will not be the way with my grinder. Properly hobbed hardened steel gears sitting in a dangerously inefficient amount of grease.-- bs0u0155, Feb 07 2022 [a1]; those are mostly (I didn't dig too deep) NOT the style of cone crusher I was remembering, which was a MASSIVE unit in a quarry that I saw on a documentary of some sort. The inner & outer cones were "point down". Drop coffee grinds to find your way back out of the rabbit hole...-- neutrinos_shadow, Feb 08 2022 Bun if the coffee pack includes a miniature version of the bearded guy who gets his red wrap caught in the rock crusher in Temple of Doom.-- RayfordSteele, Feb 08 2022 I like overspec motors, [+]-- Voice, Feb 08 2022 There seems to be a gap in the market for a 2-stroke pull-start coffee grinder.-- pocmloc, Feb 09 2022 //There seems to be a gap in the market for a 2-stroke pull- start coffee grinder.//
Because we need more noise and inconvenience 1st thing in the morning.-- bs0u0155, Feb 09 2022 Four stroke electric start-- Voice, Feb 09 2022 //Four stroke electric start//
Turbine?-- bs0u0155, Feb 09 2022 Coffee grinding steam engine that requires loading coal, moving levers, filling with water, and so forth so you can get in your exercise?-- Voice, Feb 09 2022 //I believe [8th of 7] had something like that.//
His had more explosives.-- bs0u0155, Feb 09 2022 Would a contained explosion crush/pulverize your beans in a usable way? Might need some separation between "explosive" & "product", depending on what the explosive material becomes after...-- neutrinos_shadow, Feb 09 2022 Yes I think a Coffman starter would do the job.-- pocmloc, Feb 09 2022 Squeeze the 'orange' in just the right way...-- RayfordSteele, Feb 09 2022 I'm not sure if this was meant to be sort of a joke but have you considered actually doing this? Sounds like kind of a breakthrough in coffee grinding.
I assume there are devices like this to get, I don't know, oils out of seeds or something? Can't imagine nobody has ever taken food things and put them through quiet squisher things before.-- doctorremulac3, Feb 12 2022 random, halfbakery