(4)
(5)
(6)
(7)
(3)
55
English
Prevent local discoloration of blades; this denotes heating that
causes the material structure to change locally and the hardness
to decrease.
• It is extremely important that the existing cutting angle be respec-
ted when grinding.
(3: badly grinded blade)
• If the cutting angle is not maintained, blades will be stopped in the wood due to a blunt angle
(4)
of an interrupted cutting angle
(5)
and a lot of power will be lost. A cutting angle that is too sharp
(6,7)
will weaken the cutting edge and, therefore, the blade life of the blades will be significantly
shortened
(see pictures 4,5,6 and 7)
.
• Never grind the rear side of a blade. In the case of RESIST/10
TM
blades, the profile is on the rear side. If you grind away the teeth, the
blade will lose a great deal of its cutting force.
• The top of the blade is subjected to the heaviest loads during shred-
ding. Sharpen this as little as possible so that it is not weakened.
• Every time you grind you remove some material and the blade
will become smaller on the active cutting side. You can continue to
grind until you have reached halfway through the width of the top
of the blade (see picture). Should you continue to grind, you would
compromise the blade life of the cutting side that has not yet been
used. Turn the blades when this happens
(read “11.4.3 Reversing
and renewing the shredding knives (Turn Knives)” on page
55).
•
If the top of the blade is rounded-off, (see picture) the shredding
efficiency will be reduced. In this event, further grinding of the blade
serves no purpose. This is the time to reverse or renew the blades.
(read “11.4.3 Reversing and renewing the shredding knives (Turn
Knives)” on page 55).
• Carefully close the chipping chamber and the Axelero
TM
after
grinding.
11.4.3 Reversing and renewing the shredding knives (Turn Knives)
If blades are sharpened at regular intervals, a blade life in excess of 100 hours for each blade
edge can be realised. When one blade edge has reached the end of its service life, simply reverse
the blade, thereby enabling the machine to operate for another 100 hours. If both blade edges
are worn, replace the blade as a set.
