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Industrial gear units – Manual with installation instructions
30 B 1050 en-3921
3.3.3 Check rotational direction
If an incorrect rotational direction may result in damage or potential risk, check for the correct
rotational direction of the output shaft during a test run before attaching it to the machine. Ensure the
correct rotational direction during operation.
For gear units with an integrated back stop, switching the drive motor to the blocked direction of
rotation, may result in damage to the gear unit. Gears with integrated back stops are marked with
arrows on the drive/driven sides. The arrows point in the rotation direction of the gear unit. When
connecting the motor and during motor control, ensure, e.g. by testing the field of rotation, that the
gear unit can only operate in the direction of rotation.
3.3.4 Check ambient conditions
Make sure that no aggressive or corrosive substances which attack metal, lubricants or elastomers
are present at the installation site or are subsequently expected during operation. If such substances
are to be expected, contact Getriebebau NORD.
The gear unit, especially its radial shaft seals should be protected from exposure to direct sunlight.
3.3.5 Installing the oil reservoir tank (Option OT)
The oil level tank (Option: OT) is fitted as standard prior to delivery of the gear unit. If this is not the
case, the intended position can be obtained from the order-related dimension sheet.
3.4 Installing the gear unit
NOTICE
Damage of bearing and gear wheel
• Do not carry out any welding work on the gear unit.
• Do not use the gear unit as earth connection for welding work.
The following conditions must be met at the installation site in order to prevent overheating during
operation:
• Air must be able to flow freely past all sides of the gear unit.
• A free space of 30° must be ensured around the fan intake.
• The gear unit must not be enclosed or encased.
• The gear unit must not be exposed to highly energetic radiation.
• Do not direct warm exhaust air from other units onto the gear unit.
• The base or flange to which the gear unit is attached must not input any heat into the gear unit
during operation.
• Do not allow dust to accumulate in the area of the gear unit
Please contact NORD if the conditions stated above cannot be met.
The base on which the gear unit is fitted must be vibration-free, torsionally rigid and flat. The flatness
of the bolting surface on the base must be of the requested precision (see chapter 7.5 "Tolerances for
bolting surfaces"). The base must be designed according to the weight and torque, taking into account
the forces acting on the gear unit. Bases which are insufficiently rigid may lead to radial and axial
displacement during operation, which is not measurable when the unit is stopped. When attaching the
gear unit to a concrete base using masonry bolts or base blocks, provide appropriate recesses in the
base. Tensioning bars must be cast into the concrete base in their aligned state.