DR 11.5 Chipper Shredder, Safety & Operating Instructions Manual

Page: 21 / 36

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21
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 24 ).

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 25 ), or if you are unable to remove dents or gouges with these guidelines,
replace the Knife.
Figure 24
New Knife
Short Side Beveled Edge
Knife Mounting Hole
5/16" 5/16"
Figure 25
Sharpened Knife
Short Side Beveled Edge
Knife Mounting Hole
7/32" 7/32"