AEC AG Auger Series Granulator - Manual (Page 25)

6.5” Granulators Chapter 5: Maintenance 24 of 35
Bed Knives
Use the following procedure to replace or adjust the bed knives:
1. Access the cutting chamber as directed in Section 3-4 on page 15.
2. Remove the bed knives by unbolting the bed knife bars and dropping the bars and
bed knives from the cutting chamber frame (See Figure 5).
3. Thoroughly clean the knife seats with a stone or other non-marring tool, and wipe the
screws with a lightly oiled cloth. Do not leave an oil film on the screws, as
lubrication can adversely affect the stress on a screw installed to a fixed torque value.
4. Install the new or re-sharpened bed knives.
5. Use the adjustment screws (located on the outside surface of the cutting chamber) to
set the knife clearance to 0.15 mm (0.006”). The clearance should be measured with a
feeler gauge at the ends of the knife, by rotating the rotor sheave backwards by hand.
The clearance is slightly greater at the center of the knives. Check both the upstroke
and downstroke knife gaps.
Note: Adjust the knife gradually from end to end. Adjusting one side completely and
then the other side will cause the adjusted side to tip slightly.
6. Tighten all of the mounting screws according to Section 7-3 on page 34, and re-check
the knife gap.
Figure 5: Cutting Chamber Diagram