Initial
Installation
EN 4161.758.101m – 2018-09
13
4
Initial Installation
4.1
Axial runout, radial runout and length
tolerances – drive motor
In order to guarantee fault-free operation, the
motor must not exceed the specified tolerances.
Axial runout, radial runout and length tolerances –
electric motor mounting flange:
Gearbox
type
Tolerance
A B C L
2K120/
2K121
0.025 0.050 0.050 ±
0.100
Tolerances A, B, C according to DIN 42955R
Please note that the tolerance of the shaft length
“
L” is restricted in relation to the DIN standard
The gearbox function will be impaired by
incorrect tolerances.
Comply with tolerance of shaft length “L”.
The special tolerance for shaft length “L” must be
maintained in order to guarantee fault-free
gearbox operation. Undersize shafts must be
compensated for by using shims when mounting
to the motor. Oversize shafts must be machined to
the correct length.
Take into account the permitted axial forces on the
motor shaft. Also see ZF-DUOPLAN catalog
(4161.750.102), “Performance data” chapter.
Take into account the motor shaft elongation
caused by heating in motors with fixed bearing on
the B-side (opposite the motor output shaft).
A
B
C
L
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