Hansa C4 O&M Manual - OM-005 Revision F 20/06/2019
© Hansa Chippers 2019
15
Adjust the anvil at this stage as the location
of knife edge will change after sharpening
or replacement.
The anvil is reversible. Normally the edge
will last for over 200 operating hours.
When the edge is dull, it can be reversed.
When both edges are worn, the anvil
should be replaced (contact Hansa for a
replacement).
The clearance between the knife and anvil
should be approx. 1 mm on the inside
closest to the bearing and 3 mm on the
outside closest to the edge of the rotor
(refer to diagram for more detail). Ensure
you are using the outer blade for
calibrating these distances.
The gap between the knives and the anvil
is tapered out slightly to allow for a small
amount of movement in the rotor as it
bites into the wood.
The anvil position can be adjusted by
loosening the anvil mounting bolts. Once
adjusted correctly, tighten the anvil
mounting nuts using a torque wrench to 22
Nm.
If there is not enough clearance, the knife
edge may touch the anvil through
deflection when cutting heavy branches
and damage the sharp edge. Too much
clearance will allow small twigs and fibrous
materials to be dragged through without
being cut.
Turn the cutting rotor by hand to check
that it turns freely.
8
Bearing
Edge of
rotor
Anvil
Cutting
rotor
Knife
1 mm
clearance
3 mm
clearance
