Bosch Rexroth MKE User manual

MKE
Synchronous Servomotors
UL/CSA
Operating Manual
R911414374, Edition 01

Copyright
© Bosch Rexroth AG 2021
All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in
the event of applications for industrial property rights.
Liability
The specified data is intended for product description purposes only and shall not be deemed to be a
guaranteed characteristic unless expressly stipulated in the contract. All rights are reserved with respect to
the content of this documentation and the availability of the product.
DOK-MOTOR*-MKE*GEN3U**-IT01-EN-P
DC-AE/EPI5 (jw, mb)
880e2b78ec1d60710a347e88739dab38, 1, en_US

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MKE Synchronous Servomotors
Bosch Rexroth AG
R911414374, Edition 01
Table of contents
1 About this documentation 6
1.1 Purpose and editions of this documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Presentation of information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2Safety instructions 7
2.1 Important directions on use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.2 Unintendend use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Qualification of personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 General safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Product- and technology-dependent safety instructions . . . . . . . . . . . . . . . . . 8
2.4.1 Protection against explosion hazard. . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4.2 Protection from electric voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.3 Protection from mechanical danger. . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.4 Protection against magnetic and electromagnetic fields. . . . . . . . . 9
2.4.5 Protection against ignitable electrostatic discharges. . . . . . . . . . . . 10
2.4.6 Protection against burns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.7 Electrostatic sensitive devices (ESD). . . . . . . . . . . . . . . . . . . . . . . . 10
3Scope of delivery 11
4Explosion protection 11
4.1 UL E-file number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 ATEX label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5Identification 12
5.1 Type plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Type codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6About this product 12
6.1 Safety instructions on the product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2 Features and functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2.1 Basic data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2.2 Mechanical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.3 Thermal motor protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2.4 Cooling mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2.5 Encoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2.6 Degree of protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table of contents

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6.2.7 Output shaft, balancing and extension elements . . . . . . . . . . . . . . . 18
6.2.8 Holding brake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.9 Vibration behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2.10 Bearing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2.11 Frame size, installation type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2.12 Coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.2.13 Noise emission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 Transport and storage 25
7.1 Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2 Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.1 Instructions on machine transport. . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Shock load during transport und storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Assembly 27
8.1 Flange assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.2 Assemble transmission elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.3 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.3.1 Electrical connection general notes. . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.3.2 Wiring diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.3.3 Electrical connection motor types MKE037…098. . . . . . . . . . . . . . 32
8.3.4 Electrical connection motor types MKE118. . . . . . . . . . . . . . . . . . . 32
8.3.5 Ground connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9Commissioning and operation 33
9.1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.2 Ambient conditions during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.2.1 Vibration load during operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10 Maintenance 35
10.1 Cleaning and servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10.2 Service repair, maintenance and spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . 36
11 Disassembly and exchange 37
11.1 Tools required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
11.2 Replace the motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
11.3 Preparing storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
12 Environmental protection and disposal 38

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13 Eliminate malfunction 40
14 Technical data 40
14.1 MKE037B-144. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
14.2 MKE047B-144. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
14.3 MKE098B-047. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
14.4 MKE098B-058. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
14.5 MKE118B-024. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
14.6 MKE118B-058. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
14.7 MKE118D-012. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
14.8 MKE118D-027. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
14.9 MKE118D-035. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
14.10 Tolerances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14.11 Axial force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14.12 Radial force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14.12.1 MKE037 Radial force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14.12.2 MKE047 Radial force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14.12.3 MKE098 Radial force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14.12.4 MKE118 Radial force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
14.13 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
14.13.1 MKE037 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
14.13.2 MKE047 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
14.13.3 MKE098 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
14.13.4 MKE118 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
15 Appendix 56
15.1 UL / CSA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
15.2 China RoHS 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Index 57
Table of contents

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MKE Synchronous Servomotors
Presentation of information
Bosch Rexroth AG
R911414374, Edition 01
1 About this documentation
1.1 Purpose and editions of this documentation
This instruction must be observed by assemblers, operators, service engineers and facility operators.
It contains notes about handling a motor. Before operating motors, read this operating instruction to
ensure a safe and smooth functionality and a long motor lifetime.
Table 1: Record of revisions
Edition Release
date
Notes
DOK-MOTOR*-MKE*GEN3U**-IT01-EN-P 12/2021 First edition
1.2 Presentation of informa-
tion
Safety instructions
The safety instructions in this documentation
include signal words (danger, warning, cau-
tion, note) and a signal symbol (acc. to
ANSI Z535.6-2006).
The signal word is intended to draw your atten-
tion to the safety instructions and describes the
seriousness of the danger. The warning triangle
with exclamation mark indicates the danger for
persons.
DANGER
Non-compliance with this safety instructions will
result in death or severe personal injury.
WARNING
Non-compliance with this safety instructions can
result in death or severe personal injury.
CAUTION
Non-compliance with this safety instructions can
result in moderate or minor personal injury.
NOTICE
Non-compliance with this safety instructions can
result in material damage.
Safety symbols
In the documentation, the following internation-
ally standardized safety signs and graphic sym-
bols are used. The meaning of the symbols is
described in the table.
Table 2: Meaning of safety signs
Safety sym-
bols
Meaning
Warning against dangerous electric
voltage
Warning against hot surfaces
Warning against rotating machine
parts
Warning against overhead load
Electrostatic sensitive devices
No access for persons with cardiac
pacemakers or implanted defibrilla-
tors.
Do not carry along metal parts or
clocks.
Hammer scales are forbidden

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MKE Synchronous Servomotors
Important directions on use
Bosch Rexroth AG
R911414374, Edition 01
Meaning of symbols
Table 3: Meaning of symbols
Symbol Meaning
Reference to supplementary docu-
mentation
The UL Listed Mark identifies prod-
ucts tested by Underwriters' Lab-
oratories (UL) to nationally recog-
nized safety standards.
SI
Components for the use in systems
for “integrated safety technique”
prepared.
The symbol indicating "separate
collection" for all batteries and
accumulators is the crossed-out
wheeled bin.
Markup
The following markups are used for a user-
friendly text information representation:
Reference to supplementary documentation
Remark: This note gives important informa-
tion, which must be observed.
•Listings on the first level contain a bullet
point
–Listings on the second level contain a
dash
Instruction
Instruction
🡆Result of one instruction
Instruction multilevel
1. Action step one
2. Action step two
🡆Result of an instruction
Please comply with the order of the handling
instructions.
2 Safety instructions
Observe the general safety notes in this chapter
and the safety instructions in this documentation.
Therewith, you avoid personal danger, damage
and errors.
Keep this instructions!
This operating instruction must be stored and
transferred in case of sale during the complete
product lifetime.
2.1 Important directions on
use
2.1.1 Intended use
Prerequisites for proper and safe use of
the motors are proper transport, appropriate
storage, proper assembly and connection,
careful maintenance, operation and overhaul.
The motors are suited for proper use in haz-
ardous areas according to UL 674:2020-12-28.
The motors have been exclusively designed for
installation in industrial machinery. The motors
are according to the following standards.
Standards
UL 508A:2020-08-06
UL Standard for Safety for Industrial Control Panels, UL 508A
(Third Edition, Dated April 24, 2018)
UL 674:2020-12-28
UL Standard for Safety for Electric Motors and Generators
for Use in Hazardous (Classified) Locations, UL 674 (Fifth
Edition, Dated May 31, 2011)
CSA C22.2 NO. 145-11
Electric motors and generators for use in hazardous (classi-
fied) locations (R2020)
The evaluation of the electrical and mechanical
safety and the environmental influences must
be carried out by the machine manufacturer in
accordance with the country-specific regulations
for safety of machines in installed condition.
The electrical installation must comply with
the country-specific protection requirements for
electromagnetic compatibility. The plant manu-
facturer is responsible for appropriate installation
(for example: physical separation of signal and
Safety instructions

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MKE Synchronous Servomotors
Product- and technology-dependent safety instructions
Bosch Rexroth AG
R911414374, Edition 01
power cables, using shielded cables, ...). The
EMC instructions of the converter manufacturer
must be observed.
Die Inbetriebnahme ist solange untersagt, bis die
Konformität mit diesen Anforderungen festges-
tellt ist.
2.1.2 Unintendend use
Any use of the MKE motors outside of the speci-
fied fields of application or under operating con-
ditions and technical data other than those speci-
fied in this documentation is considered to be
inappropriate use.
Do not use the motors if the ambient conditions
require a higher ATEX protection category than
specified on the type plate of the motors.
Direct operation on the three-phase network is
forbidden.
2.2 Qualification of personnel
Any work with or on the described product may
only done by qualified or skilled personnel. For
the purpose of this manual, qualified personnel
means persons who are familiar with trans-
porting, installing, mounting, commissioning and
operating the components of the electrical drive
and control system and the associated hazards
and have an appropriate qualification for their
job. Qualification of personnel contains knowl-
edge and observance of the country-specific
standards for users.
All persons working on, with or in the vicinity
of an electrical system must be informed of the
relevant safety requirements, safety guidelines
and internal instructionsEN 50110-1:2013.
2.3 General safety instruc-
tions
Important! Please read all instructions before
motor installation.
Do not install or operate motors or components
of the electric drive and control system before
you have not carefully read all delivered docu-
ments.
Please observe the particular applicable national,
local and system-specific regulations, the safety
instructions in the documentation and the
warning and informative labels on the motors.
Improper use of the motors and failure to follow
the safety instructions in this document may
result in material damage, personal injury, elec-
tric shock or, in extreme cases, to death!
In the case of damage due to non-observance
of the safety notes, Bosch Rexroth assumes no
liability.
Applications for functional safety are only allowed
if the motors have the SI‑sign on the rating plate.
2.4 Product- and technology-
dependent safety instruc-
tions
2.4.1 Protection against explosion
hazard
Product use only in hazardous areas according to
the specified labeling on the product
This product is only allowed to be used in an
area of use which is specified on the type plate
according to the explosion protection standards.
In the case of several Ex designations labelled
on the type plate, like gas and dust protection,
please observe that during operation only one
hazardous atmosphere occurs - no combination
of several.
Do any maintenance in non-hazard atmosphere.
Observe the conditions on use
Observe the notes in the application conditions
and do not exceed the specified limit values.
Observe residual risks

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MKE Synchronous Servomotors
Product- and technology-dependent safety instructions
Bosch Rexroth AG
R911414374, Edition 01
Specified residual risks and special using con-
ditions must be evaluated by the plant manu-
facturer and operator according to the product
application. This makes own measures necessary
to prevent risks.
2.4.2 Protection from electric
voltage
Work required on the electric system may only
be carried out by skilled electricians. Tools for
electricians (VDE tools) are absolutely necessary.
Before working:
•Enable.
•Secure against reactivation.
•Ensure de-energization.
•Ground and short-circuit.
•Cover or shield any adjacent live parts.
After completing the job, cancel the measures in
reverse order.
Dangerous voltage occurs during operation!
Danger to life, risk of injury by electric shock!
•Before start-up, connect the protective con-
ductors on all electric components according
to the connection plan.
•Operation, even for short measuring pur-
poses is only allowed with fixed connected
protective conductor on the specified points
of the components.
2.4.3 Protection from mechanical
danger
Dangerous movements! Danger to life, risk
of injury, heavy injury or material damage.
•Do not stay within the motion zone of the
machine. Avoid unauthorized access into the
danger zone.
•Additionally secure vertical axes to prevent
them from sinking or descending after having
shutdown the motor, for instance as follows:
–Mechanically lock the vertical axis,
–providing an external braking / catching /
clamping device, or
–ensure sufficient weight compensation of
the axes.
Only using the serially delivered motor
holding brake or an external holding brake
activated by the drive controller is not suit-
able for personal protection!
Rotating parts! Danger to life, risk of injury, heavy
injury or material damage.
•Secure key and/or transmission elements
against ejection.
•Install covers on dangerous rotating machine
parts before start-up.
2.4.4 Protection against magnetic
and electromagnetic fields
Health hazard for persons with active body aids
or passive metallic implants and for pregnant
women.
Magnetic and electromagnetic fields are created
in the direct environment of live conductors or
permanent magnets of electro motors and are a
serious danger for persons.
Observe the country-specific regulations. For
Germany, please observe the specifications of
the occupational insurance association BGV B11
and BGR B11 regarding “electromagnetic fields”.
Safety instructions

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MKE Synchronous Servomotors
Product- and technology-dependent safety instructions
Bosch Rexroth AG
R911414374, Edition 01
•For persons with active body aids (like heart
pacemakers), passive metallic implants (like
hip prosthesis) and pregnant women pos-
sible hazards exist due to electro magnetic
or magnetic fields in direct environment of
electric drive and control components and
the corresponding live conductors.
Access into these areas can be dangerous for
these persons:
–Areas, in which components of electrical
drive and control systems and corre-
sponding live conductors are mounted,
activated or operated.
–Areas in which motor parts with perma-
nent magnets are stored, repaired or
assembled.
•Above mentioned persons must contact their
attending physician before entering these
areas.
•Please observe the valid industrial safety
regulations for plants which are fitted with
components of electrical drive and control
systems and corresponding live conductors.
Crushing hazard of fingers and hands due to
strong attractive forces of the magnets!
•Handle only with protective gloves.
Risk of destruction of sensitive parts! Data loss!
•Keep watches, credit cards, check cards and
identity cards and all ferromagnetic metal
parts, such as iron, nickel and cobalt away
from permanent magnets.
2.4.5 Protection against ignitable
electrostatic discharges
Danger of explosion due to electrostatic dis-
charge
Electrostatic discharges may ignite gases, vapors
and dust. Electrostatic charges may be caused
e.g. by the following processes:
•electrostatic painting
•pneumatically conveyed dust or bulk material
•hydraulically conveyed or flowing liquids and
droplets
•mechanically driven belts, brushes and films,
etc.
Danger of explosion due to highly charge-gener-
ating processes
Highly charge-generating processes may cause
bush discharges or propagating bush discharges
and lead to explosions. This must be prevented.
This, in turn, may lead to death, severe injury and
damage to property.
Carry out cleaning work only with a moist cloth
Clean the motor with a moist cloth to avoid
electrostatic charge. Rubbing with non-conduc-
tive materials must be avoided to prevent electro-
static charges resulting in ignition hazards.
2.4.6 Protection against burns
Risk of burns due to hot motor surfaces!
•Avoid contact with hot motor surfaces. Tem-
peratures may rise over 60 °C.
•Allow the motors to cool down long enough
before touching them.
•Temperature-sensitive components may not
come into contact with the motor surface.
Ensure appropriate mounting distance of
connection cables and other components.
2.4.7 Electrostatic sensitive devices
(ESD)
The motors contain parts which underlie an elec-
trostatic danger. These components, especially
temperature sensors of the motor winding can be
destroyed by improper use.
Avoid, e.g. direct contact of open wires or con-
tacts of the connection cable of temperature sen-
sors without being electrostatically discharged or
grounded.
Remark: Do suitable ESD protective measures
before you handle imperiled components (e.g.
ESD protective clothes, wristlets, conductive
floor, grounded cabinets and working surfaces).

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MKE Synchronous Servomotors
ATEX label
Bosch Rexroth AG
R911414374, Edition 01
3 Scope of delivery
The scope of delivery of a MKE synchronous
motor contains:
•Motor in original package
•Additional type plate
•Operating instructions with safety instruc-
tions
•Protective coverings for output shaft and
connection points
•Accompanying papers
On delivery, immediately verify whether the deliv-
ered goods are those specified on the delivery
note. The forwarder must be promptly informed
of any damage on the packaging and goods,
which is detected on delivery. Start-up of dam-
aged goods is prohibited.
4Explosion protection
4.1 UL E-file number
MKE motors are listed under UL E-file number
E203009. Information can be recalled under
⮫ www-ul.com.
The motors must be operated with the power
control units listed by the manufacturers of the
following manufacturers and series:
Manufacturer Type / series
Bosch Rexroth HMS
HMD
HCS
HDD
HDS
DKCXX.3
4.2 Product description
The MKE037, -047, -098, -118 three-phase syn-
chronous motors are used for operation with
drive systems. The motors are flameproof, non-
ventilated, servo-controlled permanent magnet
special motors for use in hazardous areas with a
free internal volume of 300 cu. in. or less. The
motors are controlled by a pulse width modulated
(PWM) variable frequency drive. The speed of the
motor is varied by changing the frequency of the
power supplied. The drive frequency and voltage
are changed by fast pulse width modulation of a
bus voltage. The used current waveform is sinus-
oidal.
The motors are brushless designs with a resolver
or optical encoder.
4.3 ATEX label
Motor classification
MKE037 Class I Division 1 Groups C, D
MKE047 Class I Division 1 Groups C, D
Class II Division 1 Groups F, G
MKE098 Class I Division 1 Groups C, D
Class II Division 1 Groups F, G
MKE118 Class I Division 1 Groups C, D
Class II Division 1 Groups F, G
Surface temperature
The T-code identifies the maximum absolute
motor surface temperature that develops under
all operating conditions. Surface temperature of
motors will not exceed the following UL and CSA
maximum values under fault conditions.
Maximum surface temperature of motor
T-Code °C °F
T4 +135 +275
Labeling on the motor:
Specialty Motor for Hazardous Locations
Only use with Rexroth HCS,HDD,HDS,HMD,HMS
or DKCXX.3
Op Temp T4
Instruction and Duty Cycle: See Project Manual
Explosion protection

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MKE Synchronous Servomotors
Safety instructions on the product
Bosch Rexroth AG
R911414374, Edition 01
5Identification
5.1 Type plate
The type plate is provided for identification of
the motor and contains all significant electric
data, serial number, manufacturing date, mark
of conformity, manufacturer information and the
classification according to ANSI.
Fig. 1: MKE Type plate (example)
Remark: Before installing the motor, make
sure that it is marked accordingly and has a suffi-
ciently high protection class for your application.
Table 4: Type plate specification MKE
Symbol Meaning
3-PHASE SYN-
CHRONOUS PM-
MOTOR
Type of machine / product
MNR Material number (Rexroth product)
TYPE Type designation
SN Serial number
AN1 Revision index
m Mass
FD Manufacturing date
T.CL. Thermal class
U(max) Maximum voltage UL
M(0), MdN Standstill torque - 60K
I(0), IdN Standstill current - 60K
Km(eff) Torque constant
n(max) Maximum speed
T(amb) Ambient temperature during operation
KE(eff) R.m.s. voltage constant
Op Temp T4 Maximum surface temperature
BU-814.717 UL serial number
Brake Holding brake data (optional)
IP65 Degree of protection IPxx
Symbol Meaning
Manufacturer
information
Made in Germany / Bosch Rexroth AG, 97816 Lohr
Bgm.-Dr.-Nebel Str. 2 Germany
Table 5: Meaning of marks of conformity
Certification
mark
Meaning
The UL Listed Mark identifies products tested by
Underwriters' Laboratories (UL) to nationally rec-
ognized safety standards.
5.2 Type codes
The type code is printed onto the type plate of
the motor. For the meaning of the type code refer
to the following details.
Type codes, meaning of the digits
1 Product
2 Frame size
3 Frame length
4 Winding
5 Encoder
6 Shaft
7 Holding brake
8 Electrical connection
9 Housing design
10 Other designs (MKE037, -047, 098) / cable gland
(MKE118)
6About this product
6.1 Safety instructions on the
product
Please note the safety and prohibitive sign on the
motor. The sign significance is explained in the
following.

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MKE Synchronous Servomotors
Safety instructions on the product
Bosch Rexroth AG
R911414374, Edition 01
Information / meaning
CAUTION!
Risk of injuries due to hot surfaces.
Do not touch! Allow to cool down before mainte-
nance work.
Hot surfaces with temperatures over 60 °C may
cause burns
Let the motors cool down before working on the
motors or in close proximity to the motors. The
thermal time constant stated in the technical
data is a measure for the cooling time. Cooling
down can require up to 140 minutes.
- Wear safety gloves.
- Do not work on hot surfaces.
Motor damage due to strikes onto the motor
shaft
Do not strike the shaft end and do not exceed
the allowed axial and radial forces of the motor.
About this product

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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
6.2 Features and functions
6.2.1 Basic data
Product 3~ PM motor
Type MKE
Ambient temperature during
operation
0 … 40 °C (without de-rating)
Type of protection IP65 with shaft sealing ring (EN 60529:1991 + A1:2000 + A2:2013)
Cooling mode IC410, Self-cooling (EN 60034-6:1993)
Motor design IM B5 (EN 60034-7:1993 + A1:2001)
Coating Varnish RAL 9005
Flange similar to DIN 42948:1965-11
Shaft end Cylindrical (DIN 748-3), centering hole with thread "DS" (DIN
332-2:1983-052),
Optional with keyway (full-key balancing)
Concentricity, run-out, alignment Standard tolerance N (DIN 42955:1981-12)
Oscillating quantity level Level A (EN IEC 60034-14:2018) up to rated speed
Installation altitude 0 ... 1000 m above MSL (without derating)
Sound pressure level MKE037 ... MKE118: < 75 dB(A) +3 dB(A)
Thermal class 155 (F) (EN 60034-1:2010 + Cor.:2010)
Encoder system A (optically, Singleturn Hiperface, 128 signal periods)
B (optical, Singleturn EnDat 2.1, 2,048 signal periods)
C (optically, Multiturn Hiperface, 128 signal periods)
D (optical, Multiturn Hiperface, 2,048 signal periods)
Electrical connection Terminal box
Holding brake (option) Electrically released U N24V DC (±10%)
Motor ends, position of the elec-
trical connection
K
B
A
A:
B:
K:
A side (Drive End DE)
B side (Non Drive End NDE)
Terminal box
US standard (single wires cast)
Remark: In the case of special design, details named in the operating instructions can deviate. In this
case, order the supplementary documentation.

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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
6.2.2 Mechanical interface
Dimensions (flange)
ØC
A
B
D
E
ØG ØF
Type A
☐Flange
[mm]
B
Length
[mm]
C
Shaft
Ø [mm]
D
Shaft length
[mm]
E
Centering
collar [mm]
F
Hole circle
[mm]
G
Mounting
holes [mm]
MKE037 60 283 [phone] 4.5
MKE047 88 287 [phone] 6.6
MKE098 144 383 [phone]
MKE118B 194 489 [phone]
MKE118D 194 662 [phone]
Use the following screws and washers for flange
and foot assembly.
About this product

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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
Table 6: Tightening torque of mounting screws
Screw 1) M4 M6 M8 M10 M12 M16
Mounting holes ⌀[mm] 4.5 6.6 9 11 ... 12 14 18
Tightening torque M A[Nm] at μ
K= 0.12
3.0 10.1 24.6 48 84 206
Washer - - yes yes yes yes
1) Screws according toEN ISO 4762:2004 or EN ISO 4014:2011. Fastening class 8.8. The screw lengths
depends on material and installation situation. The specified tightening torque must be ensured.
Dimensions KLE connection thread
B
B
B
A
BC
Type A [mm] B C
MKE037 — NPT 3/4´´ —
MKE047 — NPT 3/4´´ —
MKE098 — NPT 3/4´´ —
MKE118 41 NPT 3/4´´ NPT 3/4´´
6.2.3 Thermal motor protection
The motor temperature is monitored by two sys-
tems that are operated independently of each
other. The mounted temperature sensor and the
drive-internal temperature model ensure the best
protection of motors against thermal overload.
MKE motors are protected against impermissible
heating by a PTC drilling integrated in the motor
winding.
A series circuit of three PTC thermistors (one
PTC resistor per string) is installed in each motor.
Triggering devices or control devices monitor the
resistance to a maximum value. Voltage discon-
nection occurs when only one PTC is heated up to
nominal tripping temperature (130 °C±5 °C) by
the winding.

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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
Fig. 2: Temperature-resistance-diagram
according to EN 60034-11:2004, DIN
44082:1985-06 Thermistors; PTC for thermal
machine protection; climate category HFF
Temperature range Resistance Measuring voltage
[VDC]
-20 °C to TREF -20K 20 Ωto 250 Ω ≤2.5 V
Temperature range 90 °C - 160 °C
TREF -5K ≤550 Ω ≤2.5 V
TREF +5K ≤1330 Ω ≤2.5 V
TREF +15K ≤4,000 Ω ≤7.5 V pulsed
The resistance rises sharply in the range of the
nominal response temperature. This change can
be made via an electronical evaluation within the
drive controller.
Safe disconnection of the load circuit must be
ensured.
The threshold values for motor temperature mon-
itoring are contained in the encoder data memory
and are read in and monitored automatically
during the operation with compatible Rexroth
controllers. Threshold values for MKE motors are:
•Motor-warning temperature (120 °C)
•Motor-disconnection temperature (130 °C)
The temperature signal is transmitted via the
motor interface -X2 (T1, T2).
Monitoring for a maximum value of the resistance
ensures that any cable breakage that may occur is
detected as a fault.
6.2.4 Cooling mode
Self-cooling (IC410)
In case of self-cooling motors, the heat dissipa-
tion is realized via natural convection and radia-
tion to the ambient air as well as by heat conduc-
tion to the machine construction.
The specified nominal data is reached at ambient
temperatures of 0 ... 40 °C. Unhindered vertical
convection has to be ensured by a sufficient dis-
tance of 100 mm to adjacent components. The
allowed limit temperatures must be kept in the
case of deviating minimum distances.
Pollution of the surface of the motor reduces heat
dissipation and can result in thermal overload.
The availability of the system can be increased by
regular checks and cleaning of the motors. Please
ensure access to the motors for maintenance pur-
poses.
About this product

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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
6.2.5 Encoder
Table 7: MKE - Technical data of encoder
Designation Symbol Unit Encoder
A B C D
Protocol Hiperface EnDat 2.1 Hiperface EnDat 2.1
Encoder design Singleturn abso-
lute
Singleturn abso-
lute
Multiturn abso-
lute
Multiturn abso-
lute
Distinguishable rotations 1 1 4,096 4,096
Encoder resolution 12 bit 13 bit 12 bit 13 bit
Number of impulse 128 2,048 128 2,048
System accuracy '' ± 120 ± 20 ±120 ±20
Incremental signals 1Vss
Max. current consumption IEncoder mA 60 150 60 250
Supply voltage VCCEncod
er V 7 ... 12 3.6 ... 14 7 ... 12 3.6 ... 14
Optical encoder Singleturn option A, B
The encoders allow an absolute, indirect position
recording within one mechanical rotation. The
encoders replace additional separate incremental
encoders on the motor.
Remark: After a voltage drop or after the first
POWER ON, the axis must always be moved to its
reference point first.
Exception: Applications where the maximum
travel is within one mechanical revolution of the
motor.
Optical encoder Multiturn absolute option C,
D
The encoders enable absolute, indirect position
sensing within 4,096 mechanical revolutions.
The encoders replace a separate absolute value
encoder at the motor. The absolute axis position
at this encoder variant is retained by the battery
buffering.
6.2.6 Degree of protection
The protection type according to EN
60529:1991 + A1:2000 + A2:2013 is deter-
mined by the abbreviation IP (International Pro-
tection) and two code numbers for the degree
of protection. The first reference number stands
for the degree of protection against contact and
ingress of foreign bodies, the second one stands
for the degree of protection against ingress of
water.
Standard motors (specification according to type
plate)
•IP65 with shaft sealing ring
6.2.7 Output shaft, balancing and
extension elements
Shaft end
Table 8: Options according to type code
Shaft Type
Smooth G
Keyway, with shaft
sealing ring
P
Smooth shaft
Cylindrical shaft end according to DIN 748-3,
with frontal centering hole with "DS" thread
according to DIN 332-2:1983-05.

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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
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 332-2:1983-05 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 KeyDIN
6885-1:2021-
11
Centering
holeDIN
332-2:1983-0
5
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.
Balancing
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 suit-
ability and keep the explosion protection direc-
tives during operation. Selecting of all mounting
components underlies the sole responsibility of
the plant manufacturer 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.
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 for the attachment to MKE motors are deliv-
ered by Rexroth neither separately nor mounted
on motors.
The mounting of gearbox on MKE motors,
including selection and certification underlies the
sole responsibility of the plant manufacturer 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.
Remark: If overdetermined arrangement of
bearings cannot be avoided, please contact
Bosch Rexroth.
About this product

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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
Couplings
The machine construction and the drive elements
used must be carefully adapted to the motor type
so as to make sure that the load limits of the shaft
and the bearing are not exceeded.
Remark: When extremely stiff couplings are
attached, the revolving radial force may cause an
impermissibly high load on the shaft and bearing.
Bevel gear pinion or helical drive pinion
Due to thermal expansion, the DE side of the
drive shaft can be displaced by up to 0.6 mm
in relation to the motor housing. If helical drive
pinions or bevel gear pinions directly attached
to the output shaft are used, this change in the
lengths will lead to
•a shift in the position of the axis, if the driving
pinions are not axially fixed on the machine
side.
•a thermally dependent component of the
axial force, if the driving pinions are axially
fixed on the machine side. This causes the
risk of exceeding the maximum permissible
axial force or of the gear backlash increasing
to an impermissible degree.
•Damage of the NDE bearing by exceeding the
maximum permissible axial force.
Remark: It is recommended to use drive ele-
ments with integrated bearings and mount them
on the motor shaft via axially compensating cou-
plings.
6.2.8 Holding brake
WARNING
Danger to life or high damage to property, igni-
tion and explosion hazard due to inappropriate
use!
In order to prevent danger due to ignitable gases
or explosive dust-air mixtures in the vicinity of
the motors, the user must make sure that the
holding brake does not present a source of igni-
tion in the normal service. For this reason, the
holding brake must never be used outside the
design parameters and operating conditions!
−Any commissioning and maintenance works
must only be carried out in non-explosive
environments.
−The brakes must be designed so as to fulfill
their function in normal service, if they are
installed and used as intended.
−The holding brake integrated in the motor
must only be used at standstill and never as
EMERGENCY STOP brake to stop the motor,
see P-0-0119, Optimal shutdown(Indra-
Drive firmware - functional description).
−The holding brake must not be used to brake
or stop the motor or coupled loads from
higher speeds or velocities.
MKE motors can optionally be provided with
permanent magnet brakes. The backlash-free
holding brakes are operated according to the
“electrically-released” principle (closed-circuit
principle) and open upon applying the switching
voltage.
•Number of operating cycles ≥ 5,000,000
•The holding brakes with emergency stop
function are intended to secure motor shafts
at standstill (normal operation). The holding
brakes are no operation brakes to decelerate
motors in operation from speed.
•Emergency stop situations are not a normal
operation.