PART A: Basic machine
Shredder
L 60; L60+
©
VIRTUS EQUIPMENT 2018 All rights reserved
Page 60
8.9.9
Sharpening cutting knives
Shredder rotor knives from VIRTUS have four cutting edges. This
means they can be turned three times. After that they should be
replaced with new ones. Stator knives can be turned two times
and can be resharpened as long as you can fix them with the long
hole.
TIP
Specialist sharpening of the cutting knives is part of the
service offer of VIRTUS .
WARNING
Danger of cutting caused by sharp knives, even when the ro-
tor is at a standstill.
Serious injury, particularly to hands and fingers, can result.
Wear protective gloves.
HINT
The cutting knives, in particular the rotor knives, should
only be sharpened or replaced in sets. There is a danger of
balance error if a combination of rotor knives from different
knife sets is used.
Proceed as follows:
Dismount the cutting knives (see
Dismounting the rotor knives
).
Sharpen the cutting knives.
A specialist in accordance with the sharpening plan using
particular care should uniformly sharpen the cutting knives
mechanically. It is important to make sure that sharpening takes
place with small grinding allowance and sufficient coolant supply.
The sharpening process is finished when the cutting edge is
sharply cut. Not all indentations must be ground out, otherwise the
number of possibilities for sharpening is unnecessarily reduced.
For the sharpening process, use soft grinding wheels (Quality 40
H or 46 K). Knives, which have grinding cracks, are not to be
reused due to danger of breakage during operation.
Whet the cutting edges of the cutting knives using a whetstone.
By taking these measures, the service life of the cutting knives
can be increased.
Set the cutting knives (see
setting the cutting knives
).
Mount the cutting knives (see
mounting the stator knives
).
