Sterlco SMS Series Single Shaft Shredder - Manual (Page 53)

GRN4-605 Chapter 5: Maintenance 53 of 93
Mounting the Bed Cutters
1. Clean the cutter supporting surface and the holes on the cutter holder
2. Insert sharp cutter or turn old cutter.
3. Put in the cutter adjusting screws and adjust them roughly
4. Put in the cutter mounting screws (DIN912 – M12x55 – 12.9) and tighten lightly
first
5. Adjust the gap between cutter and bed knife to 0.8-1.0 mm
6. Tighten the cutter mounting screws using a torque wrench.
NOTE: The required torque for all cutter mounting screws is 120 Nm (also see the
table under “Working on Cutting Cutters”).
7. Turn the rotor by hand
8. Check whether the cutting gap is correct and make sure the cutting cutters
do not collide as the rotor turns.
9. Put back the cover plates and mount them with the screws.
10. Remove tools and other objects from the cutting chamber.
11. Put screen back and mount it.
12. Switch ON the shredder for a short time without grinding material and listen for
noises. If there are unusual noises, determine the cause and eliminate it.
NOTE: Cutters are reversible and have four symmetrical cutting edges. This makes
it possible to turn the cutters and only to sharpen after every fourth cutter
change.
Danger of cutting caused by sharp cutters at all times—even when rotor is at
standstill. Serious Injury especially to the hands and fingers can occur. Wear
protective gloves!
Sharpening Cutters and Bed Knives
Shredder cutters have 4 cutting edges. This means they can be turned 3 times. The
cutters should be replaced after the third use. Bed knives can be turned 2 times and can
be re-sharpened as long as you can mount them with the long hole.
1. Dismount the cutting cutters (see “dismounting the rotor cutters”).
2. Sharpen the cutters and bed knives.
NOTE: A specialist in accordance with the sharpening plan using particular care
should uniformly sharpen the cutting cutters mechanically. It is important to
make sure that sharpening takes place with small grinding allowance and
sufficient coolant supply. The sharpening process is finished when the cutting
edge is sharply cut. Not all indentations must be ground out; otherwise the