DR Power 8 FPT - Manual (Page 20)

20 DR ® 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 19).

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 20), or if you are unable to remove dents or gouges with these guidelines,
replace the Knife.
Removing and Replacing the Chipper Knife
Tools and Supplies needed:
 5/16" Wrench

3/16" Allen Wrench

Awl

Propane Torch
 Gloves

Loctite ® 243
1. Using a 5/16" Wrench, remove the Access Cover (Figure 21) on the Chipper
Side.
2. Rotate the Chipper Disk using a stick until the three countersunk Allen
Screws attaching the Knife to the Flywheel are visible through the Access
Opening (Figure 21).
3. Clean out the heads of the Allen Screws with an awl or sharp tool.
4. Insert a 3/16” Allen wrench into the head of a screw.
Figure 19
New Knife
Short Side Beveled Edge
Knife Mounting Hole
5/16" 5/16"
Figure 20
Sharpened Knife
Short Side Beveled Edge
Knife Mounting Hole
7/32" 7/32"
Access Cover removed
Knife
Allen Screw, 3 places
Figure 21