FRITSCH PULVERISETTE 14 - Manual (Page 24)

NOTICE!
Risk of overheating!
Do not allow the PULVERISETTE 14 to mill longer than half
an hour without cool-down phases.
NOTICE!
Risk of melting!
Feed material with unknown properties or material with a
low melting point to the device in small quantities. Then
check the sieve to see if the material has started to stick or
melt. If this is the case, the sample must be "embrittled"
before grinding with the PULVERISETTE 14. To do this,
embrittle the material for a few minutes using liquid
nitrogen and then feed it to the device.
The rotors as well as the sieve rings with a titanium nitride
coating are suitable for grinding medium‐hard substances.
This combination is used to significantly reduce metal abra‐
sion. For milling without any metal abrasion, we recom‐
mend using the pure titanium grinding element, which can
only be used for soft to medium‐hard substances.
6.1 Impact rotor
The impact rotors are made of special, tempered stainless steel - the 12-
rib rotor is available as special accessory made of pure titanium for iron-
free grinding.
(A rotor with 12 ribs has established itself as the standard rotor for many
applications.)
8-rib rotor
The rotor with 8 ribs enables fast fine grinding for materials with a par-
ticle feed size < 10 mm (maximum length < 15 mm) or fibrous material.
(Order no. 44.4080.10)
When feeding the grinding stock, the inner funnel can be removed.
The 8-rib rotor is also suitable for pre-crushing (or rough comminution).
For this, the sieve ring spare (no. 44.1110.00) is used, optionally without
the inner funnel.
12-rib rotor
The rotor with 12 ribs enables fast fine grinding for materials with a par-
ticle feed size < 10 mm (largest length).
(special steel: order no. 44.4120.10; titanium: order no. 44.4120.32)
Using the device
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