Posted Sun Sep 2, 2007, 11:30am Subject: Re: Ceramic vs metal grinder - which is better
A ceramic burr may be quieter. A conical burr will have a greater cutting surface, and can therefore rotate at a slower speed which will add less heat, static and noise. I have seen only expensive conical-ceramic burr setups, but it should follow that it would be even cooler than a metal one.
A conical burr will have a greater cutting surface, and can therefore rotate at a slower speed which will add less heat, static and noise. I have seen only expensive conical-ceramic burr setups, but it should follow that it would be even cooler than a metal one.
Posted Sun Sep 2, 2007, 4:14pm Subject: Re: Ceramic vs metal grinder - which is better
I have a ceramic grinder at work which seems quieter at grinding than my grinder with metal burr at home, but the motor is louder. I would have thought this also to be the case because the ceramic should absorb more vibrations. The heat would not be "stored" if there was a wet/hot uneven flow of beans. But these were non-measured thoughts, and for sure I would believe the engineer with over 6000 posts, so take my post and Jon's response as a learning experience ... hopefully not for just me!
Posted Wed Sep 5, 2007, 5:09pm Subject: Re: Ceramic vs metal grinder - which is better
Just get one-o-them combo-Saeco's and don't use the espresso machine part! $30 gets ya ceramic that you have to squeeze to prevent it from falling apart when it runs. I know, I use it! Don't be a victim of advertising...Here ceramic is quieter than steel, and here you can get a ceramic grinder that says it's cooler. Note that they are from Saeco, and not both are conical. This may be an example of over zealous advertising. The PC ceramic burr grinder has been sold for $10, and may not be worth it. Take the advice, of the engineer's notes, especially one who uses a canuck-freindly "eh?" ;) When more folks put out more ceramic conical burr machines *crosses fingers* then the cost may go down *crosses toes*, and the purchase will be better justified. I did google this hand device that's $25 though...hmmm...still so much to learn! They also have the Virtuoso for $110usd..it's $250 up here DANG! But if you CAN afford that swift, then you can afford the replacement parts when you pump a rock into it! Like affording the gas to drive a Lamborghini I supppose. Yes, let us know, canadiancactus!
|| http://thoughtcompile.blogspot.com/ | + | It takes an average of 42 beans to make a shot. Douglas Adams wrote in the Hitch Hiker's Guide to the Galaxy, that 42 is the meaning of life...coincidence?
I have used that device and I can say that you get what you pay for, but this grinder does a decent job for the $$$. The burrs are indeed ceramic and it's just as quiet as similar design grinders made with metal burrs, the problem is that the burr arrangement has too much play in it to grind for espresso (works great for drip coffee though - as my camping budies can attest)
I guess I should have been more specific about ceramic burrs being expensive, I was talking about precision burrs like THESE
My whole point was the relative noise will be associated with the machine design, the motor and the housing and the burr carriers and the burr geometry much more so than the material of the cutting surface. Have you ever compared the noise from a carbide-tipped saw to a tool steel saw? (Hint: the carbide is "Tungsten Carbide", a ceramic material)
Note: I have salt and pepper mills in my kitchen with ceramic burrs, metal burrs just won't "cut it" when it comes to grinding sea salt! These were not horrifically expensive but did cost a bit more than similar units with metal burrs. I don't think the pepper mill is any quieter than my old pepper mill with steel burrs though.....
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