FRITSCH PULVERISETTE 23 - Manual (Page 24)

6.5 Wet grinding (grinding in a suspension)
CAUTION!
Burn hazard!
The grinding bowl can become hot during long grinding
periods. Allow for cooling time after grinding.
Wear safety gloves!
A longer grinding time can be selected for wet grinding in suspension but
beware of excessively high temperatures. High vapour pressure can
develop in the grinding bowl; this escapes with sudden force when the
clamping device is released.
6.6 Clamping the grinding bowls
CAUTION!
Make sure the main switch is switched off when working on
the clamping device so that the device is not inadvertently
switched on!
Before clamping, check the rubber disk (6) in the base of the grinding
bowl holder for any damage.
Place the grinding bowl in the recess in the base of the grinding bowl
holder on the rubber disc (6). Position the clamping bracket vertically
and tighten the knurled screw (1) hand-tight (not too loose and also
without using too much force or pliers). Afterwards, counter with the
knurled (2) nut.
6.7 Grinding duration
Depending on the use (high vibration frequency, heavy balls, long
grinding duration) the grinding duration should be checked for a temper-
ature increase of the grinding bowl by hand several times in five minute
intervals. If the grinding bowl is too hot to touch, implement a cooling
pause. Check that the clamping device is securely in place before
switching on again. At lower vibration frequencies the grinding duration
can be increased. No external time switches can be used due to the
restart protection.
Using the planetary mill
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