[Homeroast] Versalab M3

raymanowen at gmail.com raymanowen at gmail.com
Sat Dec 26 14:17:24 CST 2009

I looked at the
Coffetime/uk<http://coffeetime.wikidot.com/versalab-m3-grinder> site
re: the Versalab M3 coffee grinder. Bear in mind that the 17.5% VAT on the
$2k machine represents more money than I paid for the miKe-alerted Mazzer.
My opinions are thus prejudiced.

The Versalab M3 coffee grinder in its 2008 vintage makes a mockery of good
machine design. Allen head screws- Whoopie! They could have used Torx
security heads

The upper grinding burr, drive shaft and belt-driven sheave are supported
and located by just a single bearing. Very slight bearing wear will allow
the shaft to run loose and the driven burr to wobble on a shifting axis.
Even the Corvair cooling blower and its idler pulley hub used twin bearings.

When new, with zero wear, the bearing is probably able to fix the angularity
of the vertical drive shaft. It is true that the long term sum of the
angularity induced by the beans being chipped by the burrs is zero.
Unresolved moments produced by forces on the burrs perpendicular to the axis
of the shaft would be disastrous for single bearings.

Imposing radial force, axial thrust or angular moments on a single bearing
is what Deming would describe as failure engineering.

Scroll down the Coffeetime page for a close-up photo of the grounds that
look like they came out of a Kaleidoscope...

The VAT, or the Mazzer- is that the Question? No arguing with the cup, but
at $2 Big for the grinder, it's already Second Mortgage Season. Call it good
and hope nobody notices.

Cheers, Mabuhay, Iechyd da -RayO,aka Opa!

Got Grinder?

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