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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911402016, Edition 02
The standard design for a non-positive shaft-hub
connection without play and excellent smooth
running. Use clamping sets, pressure sleeves or
clamping elements for coupling the machine ele-
ments to be driven.
Shaft with keyway
Cylindrical shaft end according to DIN 748-3 with
frontal centering hole with "DS" thread according
to DIN
332-2 and keyway.
The keyway design allows form-locking transmis-
sion of torques with constant direction and low
requirements on the shaft-hub connection.
The machine elements to be driven have to be
secured in axial direction via the centering hole.
Table 9: Keys and centering hole for MKE motors
Type
Key DIN 6885-
A
Centering hole
DIN 332 Part 2
MKE037
3×3×16
DS M3
MKE047
5×5×20
DS M5
MKE098
8×8×40
DS M8
MKE118
10×8×45
DS M10
Remark:
Keys are not included in the scope of
delivery.
We recommend regular visual inspections on
shaft sealing rings. Depending on operating con-
ditions, signs of wear may appear after 5,000
operating hours. If necessary, replace the shaft
sealing rings. Repairs must be carried out by
Rexroth Service.
Winding
MKE motors are balanced with the “complete
key”.
Attachment of drive elements
Observe the notes about mounting drive ele-
ments.
Explosion protection
When mounting drive elements, check their suita-
bility and keep the ATEX directives during opera-
tion. Selecting of all mounting components
underlies the sole responsibility of the plant man-
ufacturer or operator.
WARNING
Explosion hazard and danger to life, or substan-
tial property damage!
The totality of a motor-machine combination
must comply with the specifications for explo-
sion protection according to Directive
2014/34/EU.
Please observe the notes within the product doc-
umentation of the used components when pro-
jecting and during operation.
Gearboxes with approvals for use in hazardous
areas according to Directive 2014/34/EU for the
attachment to MKE motors are delivered by
Rexroth neither separately nor mounted on
motors.
The mounting of gear units in the explosion pro-
tection area, including selection and certification
underlies the sole responsibility of the plant man-
ufacturer or operator.
CAUTION
Ingressing fluid may damage the motor!
Fluids (e.g., cooling lubricants, gear oil, etc.)
may not be present at the output shaft.
When attaching gearboxes, only use gearboxes
with a closed (oil-tight) lubrication system.
Gearbox oil should not be in permanent contact
with the shaft sealing ring of the motors.
Overdetermined bearing
When installing drive elements, avoid overdeter-
mined bearing as impermissibly high bearing
reactions can be generated due to unfavorable
tolerance ratios.