Retsch MM 400 - Manual (Page 9)

2/8/2012 9 Retsch GmbH
Technical data
Target group: Operating authority, operator
Machine type designation: MM 400
Use according to the intended purpose
The MM 400 is a laboratory machine and is suitable for milling
and homogenising soft, fibrous, hard and brittle materials in
the wet and dry state.
The MM 400 is designed for use with screw-type milling cups
with a steel casing and a milling set with clamping centerings
of dia. 36 mm and a min. clamping length of 60 mm. It is used
for fast, super fine milling of 2 samples simultaneously.
Ceramic milling cups without a complete steel casing must not
be used.
The closed milling system guarantees complete recovery of the
samples. Owing to the extremely short milling time and the
high final fineness of the material to be milled the MM 400 is
also ideally suitable for sample preparation for all spectral
analyses.
Final finenesses of down to 1 µm can be achieved, depending
on the milling time and the specific properties of the sample
material. The optimum milling cup filling is as a rule 1/3 of the
milling cup volume.
Exceptions to this are voluminous materials, such as wool,
leaves, grasses and suchlike. In these cases a filling level of
70-80% is necessary.
The sample quantity should not be less than 25% of the
milling cup volume.
The milling ball/s may otherwise damage the
milling cups.
The milling cup materials and milling ball materials
must always be identical.
The milling ball/s may otherwise damage the
milling cups.
Do not make any alterations to the machine and use
only spare parts and accessories approved by Retsch.
Otherwise the Declaration of Conformity with the
European directives by Retsch loses its validity.
Futhermore this will result in the loss of any kind
of guarantee claim.
Do not clamp any ceramic milling cups of the MM 2/200
or any milling cups without a complete steel casing.
Clamping by the metallic components of the
milling cup holder of the MM 400 can cause
damage to the ceramic parts.