Hansa C7eu O&M Manual - OM-019 revision B 03/09/2018
© Hansa Chippers 2018
16
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 of the rotor 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.
Close and secure the outlet chute.
WARNING!
Every time the knife clamping bolts are torqued up to 22 Nm and loosened off again, the life of the bolts is
reduced. The knife clamping bolts must be replaced at most after every six sharpens. Contact Hansa for replacement
bolts (m8x30 countersunk bolts of grade 12.9 or higher). Use only genuine Hansa bolts.
6
7
Top view: Outer knife and anvil set-up
Rotor
Knife
Anvil
Side view: Knife and anvil set-up
Outer
knife
Inner
knife
Bearing
Edge of
rotor
Anvil
Knife
1 mm
clearance
3 mm
clearance
Rotor
