Lenze

Technical data - gearboxes
Thermal limit rating
The permissible continuous power of gearboxes is limited
by
• the mechanical power, which depends on the material
strength, or
• the thermal limit rating, which depends on the heat
exchange.
The thermal limit rating may be below the mechanical
power specified in the selection tables.
The thermal limit rating is influenced by
• churning losses in the lubricant. These are determined
by the mounting position and the circumferential speed
of the wheels.
• the load and speed profile
• the ambient conditions: temperature, air circulation, heat
supply and heat dissipation via shafts and the
substructure
Please contact Lenze if:
– at input speeds n 1 > 1500 min -1 the following
combinations of gearbox design, gearbox size and
transmission ratios are used:
3
Gearbox design Gearbox sizes Transmission ratios
i 2000 1/min, we
recommend the use of ventilation units, which are available
as an optional extra from Lenze.
Gearbox sizes 09 to 14
Ventilation units are always included on gearboxes in this
size range.
Special measures in mounting position C
(high-mounted motor)
We always recommend the use of an oil compensating tank
when using a gearbox of size 09 to 14 in this mounting
position.
Refer to page 3-26 for a diagram and details on
dimensions. The oil compensating tank is available as an
optional extra. The tank is not required at high transmission
ratios or at low input speeds.
In these cases please contact us.
Lenze G-motion motec en 02/03 3-3