Retsch DM 400 - Manual (Page 43)

Servicing
43
CAUTION!
- Risk of crushing when changing the grinding discs.
- When changing grinding discs, secure them to
prevent them falling down.
CAUTION!
Before inserting the new discs, clean the support and the
back of the discs thoroughly. This is in particular very
important when using the ZrO
2
discs and also with
TC+CO discs, so that the discs are positioned without
tension and parallel to each other.
It is also important when tightening the screws that the
tightening torque is not too great (see table) and is the
same for both screws.
Rubber washers (I) which are placed under the steel
washers are used with ZrO
2
grinding discs. The nuts are
then tightened until the rubber washer slightly squeezes
out beneath the steel washer. This ensures a tightening
torque of approx. 20Nm.
NOTICE!
When replacing grinding discs, hold them securely and
do not allow them to fall. In the case of zirconium oxide
discs, this can lead to breakage or chipping.
Tools required:
 M20 spanner wrench (r)
 Motor shaft retainer (s)
 30 mm ratchet wrench (t)
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