Operating Instructions
2K120/2K121
Initial
Installation
13
3.3
Adaptation, motor/gearbox
The motors must have a flange-mounting option
for mounting the gearboxes.
The gearbox housing is fitted to the motor by
means of the centering adapter on the bearing
housing. This is standard.
There is also a foot mounting on the gearbox
housing for 2K120.
Different gearbox variants are used depending on
the motor type. Gearbox mounting also differs
accordingly.
Reference dimensions for hub position
Gearbox type
Dimension C in mm
2K120 33.3-0.2
2K121 53.3-0.2
CAUTION
Dimension C 32.8-0.2 (2K120) or 52.8-0.2 (2K121)
in the case of motors with fixed bearing on the
B-side.
3.3.1
Open design
The open version is the gearbox without adapter
plate but with seal on the motor output shaft (2) to
prevent gearbox oil ingress.
The drive hub (1) is delivered loose with the
gearbox. Clean the fitting surfaces of the motor (3)
and drive hub. Check the motor shaft for axial and
radial runout as described in chapter 3.1. Also
lightly grease the motor shaft.
After cleaning the fitting surfaces, heat the drive
hub to approx. 120 °C from the opening and slide
it onto the motor shaft until it reaches the stop or
shim.
CAUTION
Risk of motor shaft damage if the hub is not
sufficiently heated.
Tighten the threaded pin (9) and secure it to
prevent it from turning, see chap. 3.4.
3
6
9
2
1
11
C
