14
Pow’R’kraft Chipper 14
Revision 9/22/16
Remove the dull or damaged knives and
visually inspect the cutting disk slot and knives
mounting area and be sure they are clean and
that the replacement knives will be able to
mount flush against the cutting disk. Remount
new or sharpened knives with the knife edges
facing up in the reverse procedure, making
sure that all mounting surfaces are cleaned
beforehand.
Be careful and wear gloves when
working near the knives because
their edges can cut you if you come
in contact with them.
If the cutting disk surface is not
cleaned properly and the knives are
not mounted flush on the cutting
disk, the knives could crack when
the hardware is tightened.
The clearance between the knives and wear
plate should be approx 1mm on the inside
closest to the bearing and 3mm on the outside
edge of the cutting disk. They are tapered
out slightly to allow for a small amount of
movement in the cutting disk as it bites into
the wood.
Make sure that all locknuts are tightened
properly. Then turn the cutting disk by a long
wooden stick and check if the cutting disk
rotates freely.
Knife Resharpening
After removal, the knives should be sharpened
on a surface grinder. Be careful and wear
gloves to protect hands. It is extremely
important to consistently maintain the 38
degree cutting angle for proper performance.
Excessive heat generated during the grinding
process will damage the knives and weaken
the metal. Make sure that there is plenty of
coolant used when grinding to avoid overheat.
If you are unable to re-sharpen the knives
yourself, take the knives to a professional
machine shop for proper re-sharpening.
Normally only a slight touch up is needed.
In this way your knives should last for a long
period of time.
Wear Plate Removal and Replacement
T h e w e a r p l a t e i s c a s e - h a r d e n e d a n d
reversible. Normally the edges will last for a
long time. When the edge is rounded off, it
can be reversed. The wear plate can not be re-
sharpened as it will loose its hard edge due to
being case-hardened. When both edges are
worn, the wear plate should be replaced.
1. Remove the feed hopper.
2. Remove the locknuts and bolts that attach
the wear plate to the chipper assembly and
then remove the wear plate.
3. Install the new wear plate and secure with
the bolts and locknuts.
NOTE: The gap between the knife and wear
plate must be adjusted whenever the wear
plate is removed.
Wear Plate Adjustment
When the knife or wear plate is replaced, it is a
must to check and set the clearance between
the knife and wear plate.
The clearance between the knives and wear
plate should be approx 1mm on the inside
closest to the bearing and 3mm on the outside
edge of the cutting disk. Refer to diagram
below for more details.
Side View: Blade & anvil set-up
Blade
Wear Plate
1mm clearance in the centre
(closest to bearing)
3mm clearance at the
outside of cutting disk
Rotor
Disk
