Retsch PM 400 - Manual (Page 20)

08.02.2012 Retsch GmbH
20
Doc. Nr. GB 98.535.9999
Milling cup identification
All milling cups of type „C“ are easy to identify through the
labelling area SCH1 which shows the article no. and
material.
Milling cup labelling by the customer
In addition to the above mentioned labelling area you can
stick one of the labels supplied with the machine or
available as accessories on the area SCH2 marked on the
milling cup – for labelling e.g. milling cup contents etc.
The label is heat resistant up to 150°C and your inscription
can be cleaned with e.g. alcohol, petrol or acetone.
Cleaning the milling cups
For cleaning the milling cups the O-ring on the groove Z on
the underside of the lid can be easily prised off.
Milling cups, including also those with stuck-in ceramic
inserts, can be cleaned with alcohol, petrol or normal
domestic detergents.
Do not subject milling cups with ceramic inserts to sudden
temperature differences when rinsing.
The ceramic inserts can crack through sudden
temperature differences.
Drying the milling cups
After cleaning the milling cups can be dried at any time in a
drying oven at the temperatures given below.
Milling cup material Temperature
Special steel up to 200°C
Stainless steel up to 200°C
Tungsten carbide up to 150°C
Sintered corundum up to 120°C
Agate up to 120°C
Zirconium oxide up to 120°C
Silicon nitride up to 120°C
Tips for ultra-fine milling
In many cases high finenesses can be achieved only by wet
milling.
In dry milling processes an improved fineness of milling can be
achieved by the addition of a few drops of stearic or acetic acid,
and use of milling balls with a diameter < 10 mm and a filling
level of 70-80% of the milling cup volume.