www.nord.com B1000 -35-
6.2 Torque values
Bolt Torques [Nm]
Size Screw connections in the strength classes Sealing Threaded pin
8.8 10.9 12.9 screws on coupling
M4 3,2 5 6 - -
M5 6,4 9 11 - 2
M6 11 16 19 - -
M8 27 39 46 5 10
M10 53 78 91 8 17
M12 92 135 155 27 40
M16 230 335 390 - -
M20 460 660 770 - -
M24 790 1150 1300 80 -
M30 1600 2250 2650 170 -
M36 2780 3910 4710 - -
M42 4470 6290 7540 - -
G1¼ - - - 20 -
6.3 Troubleshooting
Gear unit malfunctions
Fault Possible cause Remedy
Unusual running noises,
vibrations
Oil too low or
bearing damage or
toothed wheel damage
Consult NORD Service
Oil escaping from gear unit or
motor
Defective seal Consult NORD Service
Oil escaping from
pressure vent
Incorrect oil level or incorrect,
contaminated oil or unfavourable
operating conditions
Oil change
Use oil expansion tank (Option
OA)
Gear unit becomes too hot
Unfavourable installation
conditions or gear unit damage
Consult NORD Service
Shock when switched on,
vibrations
Defective motor coupling or
loose gear unit mounting or
defective rubber element
Replace elastomer gear rim,
tighten motor and gear unit
fastening bolts, replace rubber
element
Drive shaft does not rotate
although motor is running
Fracture in gear unit or
defective motor coupling or
shrink disc slippage
Consult NORD Service
Attention!
Warning: shut down the gear unit immediately should any of the above faults occur!
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