Sterlco BP800 Series Granulators - Manual (Page 27)

800 Series beside-the-press Chapter 5: Maintenance 27 of 43
Inspection and Adjustment of Knives
This operation must be performed by a qualified operator or mechanical
maintenance technician.
Before carrying out any maintenance on the cutting chamber, the operator
must put on work gloves thick enough to avoid injury to the hands while
touching sharp parts and the cutting edges of blades.
To inspect the blades, remove the screen following the procedure in “Removal
and Replacement of Screen.” Then proceed as follows:
1. Open the rear-closing panel by releasing the locking latch.
2. Pivot the in-feed hopper completely back to gain clear access to the
cutting chamber.
3. Clear any process material or foreign objects between the knives.
4. Turn the rotor slowly until the first row of rotor knives are in close
proximity to the bed knife cutting edge. Turn the rotor backwards; keep
hands and fingers from directly contacting sharp knife edges.
5. Using a feeler gauge, measure the gap between the rotor and knife
cutting edges. Check each rotor knife to find the “high knife”, or the
knife that measures the smallest gap. If the gap is substantially greater
than the specified 0.006 in. to 0.008 in. (0.15 mm to 0.2 mm), the knives
need readjustment.
6. Loosen the bed knife shield; hold down the screws and remove the
shield.
7. Leave the screws that hold the bed knife just tight enough to allow the
bed knife to move.
8. Loosen the adjustment screws and lock nuts.
Figure:
Removing the
screen