Technical data

12-6 Notes Regarding Application MKE UL/CSA
DOK-MOTOR*-MKE*UL/CSA*-PR01-EN-P
12.5 Driven shaft and motor bearing
Plain driven shaft
The recommended standard model for MKE motors provides a force-
actuated, zero backlash shaft-hub connection with a high degree of quiet
running. Use clamping sets, tension sleeves or other tension elements to
attach the machine elements that are to be driven.
Drive shaft with keyway
The optional keyed shaft, according to DIN 6885, Sheet 1, Edition 08-
1968, provides a form-fitting transmission of torque with low demands at
the shaft-hub joint.
1
2
3
4
nut_passfeder.fh7
(1): Key
(2): Keyway
(3): Motor shaft
(4): Central hole
Fig. 12-8: MKE keyed shaft
In addition, axially securing the machine elements to be driven is required
using the central bore at the shaft end.
CAUTION
Damage to the shaft! During powerful reverse
operations, the bottom of the key can turn out
and reduce the quality of concentricity Ever-
increasing deformations can cause fractures.
Þ Therefore, we recommend that you use plain shafts.
MKE motors are balanced using whole keys. Therefore the machine
element to be driven must be balanced without a key. The groove length
in the hub is independent of the length of the key.
Modifications of keys may only be made by the user himself and is
his responsibility alone. Rexroth Indramat does not assume any liability
for shaft keys or motor shafts.
Balancing with whole key