Technical data

2
12
Manual – Gear Units and Gearmotors
General notes on product description
Product Description
Multi-stage
gearmotors
You can achieve particularly low output speeds by using multi-stage gear units or multi-
stage gearmotors. This involves mounting a helical gear unit or helical gearmotor on the
input end as a second gear unit.
It may be necessary to limit the motor power to match the maximum permitted output
torque of the gear unit.
Design with
reduced backlash
Helical, parallel shaft helical and helical-bevel gear units with reduced backlash are
available from gear unit size 37 and up. The circumferential backlash of these gear units
is considerably less than that of the standard versions so that positioning tasks can be
performed with great precision. The circumferential backlash is specified in angular
minutes [ ’] in the technical data. The dimension drawings for the standard versions are
applicable.
NOCO
®
fluid for
protection
against contact
corrosion
As standard, all shaft-mounted gear units and gearmotors are supplied with NOCO
®
Fluid, a paste that prevents contact corrosion. Use this paste in accordance with the
instructions in the gear unit operating instructions.
NOCO
®
fluid is food grade according to NSF certified H1.
RM gear units,
RM gearmotors
RM gear units and RM gearmotors are a special type of helical gear unit and helical
gearmotor with an extended output bearing hub. They are specifically designed for
agitating applications and can be used in applications subject to high overhung and axial
loads. The remaining data correspond to the standard helical gear units and helical
gearmotors. You can find special project planning notes for RM gearmotors in the "Proj-
ect Planning for Gear Units/RM gear units" section.
Spiroplan
®
right-
angle gear
units/motors
Spiroplan
®
right-angle gearmotors are robust, single stage right-angle gearmotors with
Spiroplan
®
gearing. The difference to the helical-worm gear units is the material combi-
nation of the right-angle gearing, and the aluminum housing. As a result, Spiroplan
®
right-angle gearmotors are wear-free, quiet-running and lightweight.
After the running-in period, Spiroplan
®
right-angle gearmotors are below the sound
pressure level of 58 dB(A) in 4-pole operation on a 60 Hz supply system. The sound-
pressure level may be 3 to 5 dB(A) higher during the initial "run-in" than after hours of
regular operation.
The wear-free gearing and the lifetime lubrication make for long periods of maintenance-
free operation. The oil fill is independent of the mounting position. Any position possible
for Spiroplan
®
right-angle gearmotors without altering the quantity of oil.
Two different flange diameters are available. On request, Spiroplan
®
right-angle gear-
motors can be equipped with a torque arm.