FLENDER B3 A Series - Cooling; Fan

It is not permissible that dimension "x
min.
“ speci󹪝ed on the backstop type plate is fallen below.
Flender must be contacted once this dimension is reached.
WARNING
Risk of injury as a result of moving system parts
There is a risk that after the motor is switched o󹪜 the load cannot be securely kept in position,
and that it can accelerate in the reverse direction.
Do not change the value of the slipping torque. The slipping torque was set to the correct value
in the factory.
3.9 Cooling
The gear unit is equipped with an axial or a radial fan depending on requirements.
3.9.1 Fan
Principle of operation
Generally, the fan is mounted on the high-speed shaft of the gear unit and is protected from
accidental contact using an air guide cover. The fan draws in air through the protective grille of
the air guide cover and blows it along the lateral air ducts on the gear unit housing. The fan
dissipates a certain amount of heat from the housing.
Improper use can damage the gear unit. Follow the instructions given below in order to protect
the gear unit against overheating:
• When you install the protective device for the coupling or similar on gear units that are
equipped with a fan, make sure that you leave su󹪟cient clearance for cooling air to be drawn
into the fan.
The required clearance is speci󹪝ed in the dimension drawing in the complete documentation
for the gear unit.
• Make sure that the air guide cover is correctly fastened.
• Protect the air guide cover against damage by external components.
• Make sure that there is no contact between the fan and the air guide cover.
• Note that the cooling e󹪜ect can be signi󹪝cantly impaired if the fan is dirty or if the surface of
the housing is covered with dust or contaminants that act as an insulating layer.
Clean the fan and the gear unit. Observe the cleaning information in chapter Maintenance
and servicing work (Page 103).
Description
3.9 Cooling
Assembly and operating instructions A5051en
34 Edition 06/2020