20
DR
®
9.5 Chipper Shredder
Knife Sharpening
You should never attempt to sharpen the Chipper Knife freehand; take the Knife to a machine shop for proper sharpening.
It is extremely important to consistently maintain the 45-degree angle for proper performance.
Excessive heat generated during the sharpening process will damage Knives and weaken the metal.
How many times a Knife can be sharpened is determined by how much material needs to be taken off to sharpen or to
compensate for dents or gouges.
A new Chipper Knife has a 5/16" measurement between the short side bevel edge and the Knife mounting holes (
Figure 28
).
The knife should never be sharpened to the extent that more than 3/32" is taken off this measurement.
Once this measurement is below 7/32" (
Figure 29
), or if you are unable to remove dents or gouges with these guidelines,
replace the Knife.
Figure 28: New Knife
Figure 29: Sharpened Knife
Short Side Beveled Edge
Knife Mounting Hole
9/32" (.28")
9/32" (.28")
Short Side Beveled Edge
Knife Mounting Hole
13/64" (.20")
13/64" (.20")
