Sterlco SPS Series Pipe Shredder - Manual (Page 51)

GRN4-610 Chapter 5: Maintenance 51 of 73
Torque Value Table
Bolt Type
Grade 8.8 Grade 10.9 Grade 12.9
Nm lb. ft. Nm lb. ft. Nm lb. ft.
M8 25 18.4 35 25.8 41 30.2
M10 49 36 69 60 83 61.2
M12 86 63.4 120 88.5 145 106
M16 210 154 295 271 355 261
M20 410 302 580 428 690 508
M24 710 523 1000 737 1200 885
Checking the condition of the cutters
The cutters become blunt after a certain number of operation hours. They need to be
checked regularly. Using blunt knives has several consequences including decreased
grinding capacity, increased current consumption of the drive motor, inexact cuts, and
overheating of the material.
Sharp knives are dangerous even while the rotor is at standstill.
Serious injury can result—especially to the hands and fingers—wear
protective gloves!
Dismounting the cutters
Follow the steps below to dismount the cutters. (See image below.)
1. Switch OFF the shredder at the main switch.
2. Safeguard the main switch with a padlock.
3. Open the lower housing panel.
4. Safeguard the housing panel.
5. Clean the hexagon head socket of the cutter mounting bolt (2).
6. Loosen the bolt using a high quality Allen key (.4 in./10 mm). Lightly knock the
Allen key with a hammer to loosen if necessary.
7. Take out the cutter mounting bolt, the washer, and the cutter.