Mitsubishi Electric ZKB AN Series User manual

JZ990D43001E
How to obtain manuals
How to obtain manuals
For product manuals or documents, consult with the Mitsubishi Electric dealer
from who you purchased your product.
Registration
The company names and product names described in this manual are the
trademarks or registered trademarks of their respective companies.
Safety Precaution (Read these precautions before use.)
This manual classifies the safety precautions into two categories:
and .
Depending on the circumstances, procedures indicated by may
also cause severe injury.
It is important to follow all precautions for personal safety.
In case of trouble, in spite of our best efforts in quality control, it may be
assumed to cause continuous running state due to failure of the clutch and
the brake, and hence it is advised to pay sufficient consideration to safety
measures at the machine side.
Store this manual carefully so that it can be referred to when required, and
make sure to send it to the end user.
Indicates that incorrect handling may cause
hazardous conditions, resulting in death or severe
injury.
Indicates that incorrect handling may cause
hazardous conditions, resulting in medium or slight
personal injury or physical damage.
Use protective cover.
The rotating elements are exposed outside, and the
hand or part of body may be injured if touching the
product. Install a protective cover, allowing smooth
ventilation, so that part of the body may not be in
contact with the machine. It is also recommended to
provide with a safety mechanism to stop the rotating
elements immediately when the cover is opened.
Mitsubishi Electric is not responsible for any damage or trouble caused by
repair, disassembly or modification of the product by any third party other than
Mitsubishi or specified agent.
For repair or disassembly services, therefore, please call the service network of
Mitsubishi.
Warranty
Exclusion of loss in opportunity and secondary loss from warranty liability
Regardless of the gratis warranty term, Mitsubishi shall not be liable for
compensation to:
(1) Damages caused by any cause found not to be the responsibility of Mitsubishi.
(2) Loss in opportunity, lost profits incurred to the user by Failures of Mitsubishi
products.
(3) Special damages and secondary damages whether foreseeable or not,
compensation for accidents, and compensation for damages to products other
than Mitsubishi products.
(4) Replacement by the user, maintenance of on-site equipment, start-up test run
and other tasks.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in a
device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
Mitsubishi Electric.
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
1. Cautions before use
1) The powder is contained inside, and hence never give impact or incline the
product.
2) Don’t leave the product in a damp place.
3) Don’t pull or tear the lead wire, and handle with care.
Never use the unit in an atmosphere in which
inflammation or explosion is expected.
While slipping, a spark may be ignited on the internal
working surface. Never use in a flammable or explosive
atmosphere with oil or grease. Use pressure-proof and
explosion-proof type. Enclose the main body when using
near flammable material such as cotton. When enclosed,
however, it must be noted that the allowable heat
dissipation is lowered.
Keep the product away from water, oil, and grease.
Not only the working surface but also the product main
body should be protected from water, oil, and grease. If
water, oil, or grease is on the main body, it may flow to the
working surface and may remarkably lower the torque. As
a result, the machine may not stop at the specified point
due to inertial run, or may run at an abnormal speed.
Such abnormal operation of the machine may cause injury.
Check the environments.
Never use in a place exposed to dust, high temperature,
dew condensation, rain and wind, oil mist. Don't install
directly in a place exposed to vibration or impact. Or it
may lead to damage or malfunction of the product or
deterioration of performance.
This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Never suspend the product by holding the leadwire.
Or the lead wire may be broken and the product may drop
to cause injury.
Hold the product itself when attaching or detaching.
If the product is not used for a long time, store the clutch
at a non-humid place, or take measures to protect the
clutch from moisture.
If the inside of the product is moistened, the product may
be corroded and operation may not be possible, or the
performance may be deteriorated.
2. Structure and principle of operation
The clutch structure is shown in Fig. 1. The drive member linked to the input side and the driven member linked to the output side are disposed concentrically
across a powder gap.
The powder gap is filled with powder (magnetic iron powder), and the coil for passing a magnetic flux to the powder is built in the stator, and it is designed to feed
direct current from outside through the lead wire.
Meanwhile, the ZKB-0.3, 0.6AN/YN type are not provided with stator, and formed in one body with the bracket.
The brake has the driven member and exciting coil unit integrated into one body as shown in Fig. 2.
While the drive member is rotating, when a current flows in the coil, a magnetic flux is generated as indicated by broken line in the drawing, and the powder is
linked like a chain along the magnetic flux, and its coupling force the driven member is driven, and the torque is transmitted to the output side.
When the exciting current is cut off, the magnetic flux disappears, and the coupling force of the powder is eliminated, thereby cutting of transmission of powder to
the driven member.
Fig. 1 Structural diagrams of ZKB powder clutches
(representative examples)
Seal
Exciting coil
Lead wire
Magnetic flux
Input side bracket (stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Output side bracket
(stationary element)
Drive plate
Driven member
Output shaft
(rotating element)
Bearing Bearing
(ZKB-0.06 to 0.6AN type)
(ZKB-1.2 to 40BN type)
Exciting coil Magnetic flux
Input side bracket
(stationary element)
Input shaft
(rotation element)
Snap ring
Stator (stationary element)
Seal Bearing Bearing
Snap ring
Output shaft
(rotating element )
Lead wire
Output side bracket
(stationary element)
Drive plate
Driven member
Bearing
Powder gap
Drive member
Fig. 2 Structural diagrams of ZKB powder brakes
(representative examples)
(ZKB-1.2 to 40XN type)
(ZKB-0.06 to 0.6YN type)
Exciting coil
Lead wire
Magnetic flux
Input side bracket (stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Stator (stationary element)
Drive plate
Driven member
Fixed side bracket
(stationary element)
Bearing
Seal
Exciting coil
Lead wire
Magnetic flux
Input side bracket
(stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Drive plate
Driven member
Fixed side bracket
(stationary element)
Bearing
Seal
3. Assembling of clutch, brake
(Note)
The hoist operation by using the eyebolts should be done by a qualified operator.
1) Make sure there is enough clearance when installing the product to prevent
impact and undue force from being applied to the product during assembly
work.
2) Use the powder clutch in the regular installation status in which the high-
speed rotation side is located as the input side. (The nameplate indicates
the input side and output side with arrows.)
Install both the clutch and brake so that the shafts become horizontal.
3) For coupling with the load shaft, use an elastic coupling.
4) For pulley coupling, pay attention to the belt tension, and never apply initial
tension more than necessary.
5) The voltage polarity is not specified.
Turn off the power, and make sure rotating elements are
stopped.
Never work while rotating, or it may cause electric shock
or injury. When mounting, dismounting, or adjusting, turn
off the power source, and make sure the rotating
elements are stopped still. At this time, be careful not to
have fingers or hand pinched.
Tighten bolts to specified torque, and lock securely.
Depending on the degree of tightening, the bolts may be
broken to cause injury. Using specified bolt material,
tighten bolts to specified torque, and lock securely with
adhesive, spring washer or the like as specified. Besides,
since the parts composing the product rotate relatively to
each other, the tightened parts must be fixed securely for
the safety of operation.
The bolt strength and tightening torque are designated in
the specification.
Connect lead wires securely.
Otherwise it may lead to an electric shock.
Connect securely, both electrically and mechanically, and
insulate appropriately.
Be sure to connect a surge absorber parallel to the
exciting coil to cut off the direct current.
Cutting off the current may cause a large surge voltage,
and the surge voltage may deteriorate the peripheral
units.
For this reason, be sure to use a surge absorber, such as
a diode, varistor, and protective resister.
Use wire size suited to current capacity.
If wire of smaller current capacity is used, the insulating
coating may melt down to cause insulation failure,
possibly leading to electric shock, current leak, or fire.
The specified current of the product is designated in the
specification.
Mount, dismount, and transport with greatest care.
Carrying of a heavy product may cause lumbago or injury
by dropping.
Be careful sufficiently when mounting, dismounting, or
transporting.
In particular, handle the product provided with eyebolts by
using a hoist or the like.
4. Operation
If a shock is applied to the clutch during transportation, powder may be
scattered inside the clutch. For this reason, before starting regular
operation, perform running-in while following the procedure below to
collect powder into the powder gap, if necessary.
In addition, if the powder is replaced, be sure to perform running-in.
When performing forced-air cooling, confirm that a completely deoiling/
dewatering type air filter is attached to the air introduction area.
1) Running-in procedure
Fix the output shaft to prevent rotation. (If it is difficult to fix the shaft,
apply a heavy load to prevent rotation of the output shaft.)
After that, without flowing the exciting current, rotate the drive member
at approximately 200 r/min for 1 minute, and then set the exciting
current to 1/4 to 1/2 of the rated value. While rotating the drive
member, flow the exciting current for 5 seconds, and then stop flowing
the current for 10 seconds. Repeat this cycle approximately 10 times.
2) End of running-in
While the running-in is insufficient, the torque output may be low or the
torque may fluctuate, but as the running-in becomes sufficient and the
powder comes to work effectively, a stable torque corresponding to the
exciting current is produced.
After the running-in, start regular operation.
Depending on the conditions of use, the stator surface temperature may rise
considerably, but be sure to observe strictly the surface temperature
regulation of 100°C or less in the case of spontaneous cooling, or 70°C or
less in the case of forced air cooling.
If the surface temperature exceeds the limit, relax the operation conditions,
and prevent overheat of the clutch and brake.
In forced air cooling, in particular, continue to feed air at specified flow rate
until the stator surface temperature becomes equal to the ambient
temperature after the operation is stopped. For the sake of prevention of
moisture, however, it is not favorable to continue to feed air after the surface
temperature is equalized with the ambient temperature.
The above-described surface temperature is a reference value. Be sure to
use the clutch within the allowable heat dissipation.
(Herein, the surface temperature is mentioned on the basis of the ambient
temperature of 30°C. The allowable ambient temperature range is 0 to 40°C.)
Never touch the product during operation.
The rotating elements are exposed outside, and the
hand or part of body may be injured if touching the
product. Install a protective cover, allowing smooth
ventilation, so that the hand or fingers may not be in
contact with the machine during operation, and also
a safety mechanism to stop the rotating elements
immediately when the cover is opened.
Never increase the rotating speed more than
allowable.
If the rotating speed is raised more than allowable,
vibration increases to cause breakage and scattering
of powder, and it is very dangerous. Rotate within
allowable speed, and install protective cover.
Use thermometer when measuring temperature.
Don't touch directly by hand to avoid burns. Turn off
the power source, and make sure the rotating
elements are stopped still, and measure with
thermometer.
Measure promptly.
MODEL
ZKB-AN, ZKB-BN
ZKB-YN, ZKB-XN
INSTRUCTION MANUAL
This manual describes the part names, dimensions, mounting, and specifications
of the product. Before use, read this manual and the manuals of all relevant
products fully to acquire proficiency in handling and operating the product. Make
sure to learn all the product information, safety information, and precautions.
Store this manual in a safe place so that it can be taken out and read whenever
necessary. Always forward it to the end user.
Effective May 2018
Specifications are subject to change without notice.
2006 MITSUBISHI ELECTRIC CORPORATION
Manual Number JZ990D43001
Revision E
Date May 2018

JZ990D43001E
How to obtain manuals
How to obtain manuals
For product manuals or documents, consult with the Mitsubishi Electric dealer
from who you purchased your product.
Registration
The company names and product names described in this manual are the
trademarks or registered trademarks of their respective companies.
Safety Precaution (Read these precautions before use.)
This manual classifies the safety precautions into two categories:
and .
Depending on the circumstances, procedures indicated by may
also cause severe injury.
It is important to follow all precautions for personal safety.
In case of trouble, in spite of our best efforts in quality control, it may be
assumed to cause continuous running state due to failure of the clutch and
the brake, and hence it is advised to pay sufficient consideration to safety
measures at the machine side.
Store this manual carefully so that it can be referred to when required, and
make sure to send it to the end user.
Indicates that incorrect handling may cause
hazardous conditions, resulting in death or severe
injury.
Indicates that incorrect handling may cause
hazardous conditions, resulting in medium or slight
personal injury or physical damage.
Use protective cover.
The rotating elements are exposed outside, and the
hand or part of body may be injured if touching the
product. Install a protective cover, allowing smooth
ventilation, so that part of the body may not be in
contact with the machine. It is also recommended to
provide with a safety mechanism to stop the rotating
elements immediately when the cover is opened.
Mitsubishi Electric is not responsible for any damage or trouble caused by
repair, disassembly or modification of the product by any third party other than
Mitsubishi or specified agent.
For repair or disassembly services, therefore, please call the service network of
Mitsubishi.
Warranty
Exclusion of loss in opportunity and secondary loss from warranty liability
Regardless of the gratis warranty term, Mitsubishi shall not be liable for
compensation to:
(1) Damages caused by any cause found not to be the responsibility of Mitsubishi.
(2) Loss in opportunity, lost profits incurred to the user by Failures of Mitsubishi
products.
(3) Special damages and secondary damages whether foreseeable or not,
compensation for accidents, and compensation for damages to products other
than Mitsubishi products.
(4) Replacement by the user, maintenance of on-site equipment, start-up test run
and other tasks.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in a
device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
Mitsubishi Electric.
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
1. Cautions before use
1) The powder is contained inside, and hence never give impact or incline the
product.
2) Don’t leave the product in a damp place.
3) Don’t pull or tear the lead wire, and handle with care.
Never use the unit in an atmosphere in which
inflammation or explosion is expected.
While slipping, a spark may be ignited on the internal
working surface. Never use in a flammable or explosive
atmosphere with oil or grease. Use pressure-proof and
explosion-proof type. Enclose the main body when using
near flammable material such as cotton. When enclosed,
however, it must be noted that the allowable heat
dissipation is lowered.
Keep the product away from water, oil, and grease.
Not only the working surface but also the product main
body should be protected from water, oil, and grease. If
water, oil, or grease is on the main body, it may flow to the
working surface and may remarkably lower the torque. As
a result, the machine may not stop at the specified point
due to inertial run, or may run at an abnormal speed.
Such abnormal operation of the machine may cause injury.
Check the environments.
Never use in a place exposed to dust, high temperature,
dew condensation, rain and wind, oil mist. Don't install
directly in a place exposed to vibration or impact. Or it
may lead to damage or malfunction of the product or
deterioration of performance.
This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Never suspend the product by holding the leadwire.
Or the lead wire may be broken and the product may drop
to cause injury.
Hold the product itself when attaching or detaching.
If the product is not used for a long time, store the clutch
at a non-humid place, or take measures to protect the
clutch from moisture.
If the inside of the product is moistened, the product may
be corroded and operation may not be possible, or the
performance may be deteriorated.
2. Structure and principle of operation
The clutch structure is shown in Fig. 1. The drive member linked to the input side and the driven member linked to the output side are disposed concentrically
across a powder gap.
The powder gap is filled with powder (magnetic iron powder), and the coil for passing a magnetic flux to the powder is built in the stator, and it is designed to feed
direct current from outside through the lead wire.
Meanwhile, the ZKB-0.3, 0.6AN/YN type are not provided with stator, and formed in one body with the bracket.
The brake has the driven member and exciting coil unit integrated into one body as shown in Fig. 2.
While the drive member is rotating, when a current flows in the coil, a magnetic flux is generated as indicated by broken line in the drawing, and the powder is
linked like a chain along the magnetic flux, and its coupling force the driven member is driven, and the torque is transmitted to the output side.
When the exciting current is cut off, the magnetic flux disappears, and the coupling force of the powder is eliminated, thereby cutting of transmission of powder to
the driven member.
Fig. 1 Structural diagrams of ZKB powder clutches
(representative examples)
Seal
Exciting coil
Lead wire
Magnetic flux
Input side bracket (stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Output side bracket
(stationary element)
Drive plate
Driven member
Output shaft
(rotating element)
Bearing Bearing
(ZKB-0.06 to 0.6AN type)
(ZKB-1.2 to 40BN type)
Exciting coil Magnetic flux
Input side bracket
(stationary element)
Input shaft
(rotation element)
Snap ring
Stator (stationary element)
Seal Bearing Bearing
Snap ring
Output shaft
(rotating element )
Lead wire
Output side bracket
(stationary element)
Drive plate
Driven member
Bearing
Powder gap
Drive member
Fig. 2 Structural diagrams of ZKB powder brakes
(representative examples)
(ZKB-1.2 to 40XN type)
(ZKB-0.06 to 0.6YN type)
Exciting coil
Lead wire
Magnetic flux
Input side bracket (stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Stator (stationary element)
Drive plate
Driven member
Fixed side bracket
(stationary element)
Bearing
Seal
Exciting coil
Lead wire
Magnetic flux
Input side bracket
(stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Drive plate
Driven member
Fixed side bracket
(stationary element)
Bearing
Seal
3. Assembling of clutch, brake
(Note)
The hoist operation by using the eyebolts should be done by a qualified operator.
1) Make sure there is enough clearance when installing the product to prevent
impact and undue force from being applied to the product during assembly
work.
2) Use the powder clutch in the regular installation status in which the high-
speed rotation side is located as the input side. (The nameplate indicates
the input side and output side with arrows.)
Install both the clutch and brake so that the shafts become horizontal.
3) For coupling with the load shaft, use an elastic coupling.
4) For pulley coupling, pay attention to the belt tension, and never apply initial
tension more than necessary.
5) The voltage polarity is not specified.
Turn off the power, and make sure rotating elements are
stopped.
Never work while rotating, or it may cause electric shock
or injury. When mounting, dismounting, or adjusting, turn
off the power source, and make sure the rotating
elements are stopped still. At this time, be careful not to
have fingers or hand pinched.
Tighten bolts to specified torque, and lock securely.
Depending on the degree of tightening, the bolts may be
broken to cause injury. Using specified bolt material,
tighten bolts to specified torque, and lock securely with
adhesive, spring washer or the like as specified. Besides,
since the parts composing the product rotate relatively to
each other, the tightened parts must be fixed securely for
the safety of operation.
The bolt strength and tightening torque are designated in
the specification.
Connect lead wires securely.
Otherwise it may lead to an electric shock.
Connect securely, both electrically and mechanically, and
insulate appropriately.
Be sure to connect a surge absorber parallel to the
exciting coil to cut off the direct current.
Cutting off the current may cause a large surge voltage,
and the surge voltage may deteriorate the peripheral
units.
For this reason, be sure to use a surge absorber, such as
a diode, varistor, and protective resister.
Use wire size suited to current capacity.
If wire of smaller current capacity is used, the insulating
coating may melt down to cause insulation failure,
possibly leading to electric shock, current leak, or fire.
The specified current of the product is designated in the
specification.
Mount, dismount, and transport with greatest care.
Carrying of a heavy product may cause lumbago or injury
by dropping.
Be careful sufficiently when mounting, dismounting, or
transporting.
In particular, handle the product provided with eyebolts by
using a hoist or the like.
4. Operation
If a shock is applied to the clutch during transportation, powder may be
scattered inside the clutch. For this reason, before starting regular
operation, perform running-in while following the procedure below to
collect powder into the powder gap, if necessary.
In addition, if the powder is replaced, be sure to perform running-in.
When performing forced-air cooling, confirm that a completely deoiling/
dewatering type air filter is attached to the air introduction area.
1) Running-in procedure
Fix the output shaft to prevent rotation. (If it is difficult to fix the shaft,
apply a heavy load to prevent rotation of the output shaft.)
After that, without flowing the exciting current, rotate the drive member
at approximately 200 r/min for 1 minute, and then set the exciting
current to 1/4 to 1/2 of the rated value. While rotating the drive
member, flow the exciting current for 5 seconds, and then stop flowing
the current for 10 seconds. Repeat this cycle approximately 10 times.
2) End of running-in
While the running-in is insufficient, the torque output may be low or the
torque may fluctuate, but as the running-in becomes sufficient and the
powder comes to work effectively, a stable torque corresponding to the
exciting current is produced.
After the running-in, start regular operation.
Depending on the conditions of use, the stator surface temperature may rise
considerably, but be sure to observe strictly the surface temperature
regulation of 100°C or less in the case of spontaneous cooling, or 70°C or
less in the case of forced air cooling.
If the surface temperature exceeds the limit, relax the operation conditions,
and prevent overheat of the clutch and brake.
In forced air cooling, in particular, continue to feed air at specified flow rate
until the stator surface temperature becomes equal to the ambient
temperature after the operation is stopped. For the sake of prevention of
moisture, however, it is not favorable to continue to feed air after the surface
temperature is equalized with the ambient temperature.
The above-described surface temperature is a reference value. Be sure to
use the clutch within the allowable heat dissipation.
(Herein, the surface temperature is mentioned on the basis of the ambient
temperature of 30°C. The allowable ambient temperature range is 0 to 40°C.)
Never touch the product during operation.
The rotating elements are exposed outside, and the
hand or part of body may be injured if touching the
product. Install a protective cover, allowing smooth
ventilation, so that the hand or fingers may not be in
contact with the machine during operation, and also
a safety mechanism to stop the rotating elements
immediately when the cover is opened.
Never increase the rotating speed more than
allowable.
If the rotating speed is raised more than allowable,
vibration increases to cause breakage and scattering
of powder, and it is very dangerous. Rotate within
allowable speed, and install protective cover.
Use thermometer when measuring temperature.
Don't touch directly by hand to avoid burns. Turn off
the power source, and make sure the rotating
elements are stopped still, and measure with
thermometer.
Measure promptly.
MODEL
ZKB-AN, ZKB-BN
ZKB-YN, ZKB-XN
INSTRUCTION MANUAL
This manual describes the part names, dimensions, mounting, and specifications
of the product. Before use, read this manual and the manuals of all relevant
products fully to acquire proficiency in handling and operating the product. Make
sure to learn all the product information, safety information, and precautions.
Store this manual in a safe place so that it can be taken out and read whenever
necessary. Always forward it to the end user.
Effective May 2018
Specifications are subject to change without notice.
2006 MITSUBISHI ELECTRIC CORPORATION
Manual Number JZ990D43001
Revision E
Date May 2018

5. Torque adjustment
The relation of torque and exciting current is almost proportional as shown
in Fig. 3, and therefore by adjusting the current, the torque can be easily
adjusted.
Set to a proper value in consideration of the finish of the product or
working condition.
Fig.3 Exciting current vs. torque characteristics
(representative examples)
Use within rated torque.
If used over the rated torque, not only the
performance deteriorates, but also mechanical
breakage or injury may be caused. Hence, use with
rated torque. In particular, it must be noted that a
torque over the rating may be cause even if used at
the rated current, and therefore check the current-
torque characteristic, and adjust the exciting current.
(In the course of use, the torque gradually declines,
and therefore in manufacturing, a proper allowance
is considered initially.)
Use within the allowable heat dissipation.
If used over allowable heat dissipation, the clutch
may be extremely heated, and the working surface
may be extremely hot and red. As a result, a fire may
be caused. In addition, the performance may be
deteriorated. Be sure to use within the allowable heat
dissipation (refer to Fig. 4).
0
0
0.2
0.4
0.6
0.8
1.0
1.2
Exciting current (A)
Torque (N·m)
ZKB-0.06AN/YN
0.50.40.30.20.1
0
2
4
6
8
10
00.80.60.40.2
Exciting current (A)
Torque (N·m)
ZKB-0.6AN/YN
ZKB-0.3AN
ZKB-0.3YN
0
01234
100
200
300
ZKB-10BN/XN
ZKB-20BN/XN
Exciting current (A)
Torque (N·m)
0
0
10
30
40
20
Torque (N·m)
ZKB-2.5BN/XN
ZKB-1.2BN/XN
1.51.00.5
Exciting current (A)
012
0
10
30
40
20
50
70
80
60
Torque (N·m)
ZKB-5BN/XN
Exciting current (A)
0
01234
100
200
300
400
500
600
Exciting current (A)
Torque (N·m)
ZKB-40BN/XN
Fig.4 Allowable continuous heat dissipation characteristics
6. Maintenance
Check the following items.
Turn off the power, and make sure rotating elements are
stopped.
Never work while rotating, or it may cause injury. When
checking, turn off the power source, and make sure the
rotating elements are stopped still. At this time, be careful
not to have fingers or hand pinched.
10
30
50
0 1000 1800
20
40
60
80
0
70
Allowable continuous heat
dissipation (W)
Input rotation speed (r/min)
ZKB-0.6AN/YN
ZKB-0.3AN/YN
ZKB-0.06AN/YN
01000 1800
500 1500
100
200
0
400
300
Input rotation speed (r/min)
Allowable continuous heat
dissipation (W)
ZKB-5BN/XN
ZKB-2.5BN/XN
ZKB-1.2BN/XN
200
600
1000
0 1000 1800
400
800
1200
0
1400
500 1500
Input rotation speed (r/min)
Allowable continuous heat
dissipation (W)
ZKB-40BN/XN
ZKB-20BN/XN
ZKB-10BN/XN
1) When the powder is moist, the expected performance may not be
exhibited.
Be careful not to admit water or oily material inside the clutch.
In particular, if used near the gear box, the oil may invade through the
shaft, and therefore perfect oil sealing is advised.
2) The powder replacement timing cannot be indicated clearly because
the powder life varies depending on the conditions of use (slip rotation
speed, heat dissipation). Judge the replacement timing when the torque
decreases to 70% or less of the initial value. However, it is actually
difficult to check the torque.
Even if the torque has decreased, it increases when the exciting current
increases. Therefore, if the specified torque cannot be obtained at the
rated current, replace the powder.
To replace the powder, please contact our service network.
3) Check the coupling mounting bolts and others for looseness.
7. Troubleshooting
In the event of a serious trouble or when replacing parts, call our agent,
service center, or sales office, by specifying the manufacturing serial number
together with the type name of the clutch.
For repair or disassembly services, please call our designated service
network.
Mitsubishi Electric is not responsible for any damage or trouble caused by
repair, disassembly or modification of the product by any third party other
than Mitsubishi or specified agent.
When disposing of this product at the end of its
service life, please follow local and national guideline
for the disposal of industrial products.
Trouble Cause Remedy
Torque output is low.
Torque is not
generated by
passing exciting
current.
Insufficient running-
in.
Powder is moistened
by water or oil.
Deterioration of
powder.
Run in again.
Change powder.
Torque is generated
without passing
current.
Torque fluctuates on
every rotation.
Defective bearing.
Deterioration or
sintering of powder.
Replace bearing.
Change powder.
Surface temperature
exceeds 90°C
(spontaneous
cooling).
Overload. Relax the conditions
of use.
Surface temperature
exceeds 70°C
(forced cooling).
Overload
Insufficient air flow
rate.
Relax the conditions
of use.
Increase air flow
rate.
Use thermometer when measuring temperature.
Don't touch directly by hand to avoid burns. Turn off
the power source, and make sure the rotating
elements are stopped still, and measure with
thermometer.
Measure promptly.
8. Specification
Rated voltage: DC24V
(Notes)
1) The bearing is a special product manufactured in consideration of heat resistance and others for making the best of the powder clutch characteristic.
2) The air pressure is a reference value.
Type
Specification
ZKB-
0.06AN
0.06YN
ZKB-
0.3AN
0.3YN
ZKB-
0.6AN
0.6YN
ZKB-
1.2BN
1.2XN
ZKB-
2.5BN
2.5XN
ZKB-
5BN
5XN
ZKB-
10BN
10XN
ZKB-
20BN
20XN
ZKB-
40BN
40XN
Torque (N•m) 0.6 3 6 12 25 50 100 200 400
Rated current (A/75°C) 0.46 0.53 0.81 0.94 1.24 2.15 2.4 2.7 3.5
Coil resistance (/75°C) 52.1 45.1 29.7 25.6 19.3 11.2 10.0 8.9 6.9
Coil insulation resistance 10 Mor more by DC 500 V insulation resistance tester, at ordinary temperature and humidity
Powder mass (g) 3.5 7.5 10 20 33 60 140 225 370
Product mass (kg)
AN/BN 1.8 3.3 4.0 5.5 10 16 37 58 108
YN/XN 1.7 3.1 3.7 5.2 9.0 14.5 34 53 100
Bearing 6000 6202 6202 6003 6005 6206 6307 6308 6310
Allowable continuous heat dissipation (W)
(During spontaneous cooling) Refer to fig. 4
Forced air-cooling maximum
continuous heat dissipation
Air pressure (104Pa) - - - 3 5106 520
Air flow rate (m3/min) - - - 0.2 0.4 0.6 1.1 1.6 2.0
Heat dissipation (W) - - - 250 380 700 1100 1900 2800
Bracket tightening bolt strength Strength division II column 7T or equivalent of JIS B 1051 for mechanical properties of bolts and machine
screws.
Tightening torque (N•m) 5.5 to 7.0 8.0 to 13.5 39 to 65 65 to 109
Allowable rotating speed (r/min) 1800
9. Others
1) In the product having a three-digit figure attached to the model name such
as 001 in ZKB-5BN-001, the mounting dimensions, voltage and other
conditions are special, and may differ from the description herein, but the
basic operation and handling cautions are common.
2) The structural diagrams are representative examples, and may differ
depending on the model and options including the specification. Inquire us
for details.
「电器电子产品有害物质限制使用标识要求」的表示方式
Note: This symbol mark is for China only.
含有有害6物质的名称，含有量，含有部品
本产品中所含有的有害6物质的名称，含有量，含有部品如下表
所示。
产品中有害物质的名称及含量
本表格依据SJ/T 11364的规定编制。
○:表示该有害物质在该部件所有均质材料中的含量均在GB/T
26572规定的限量要求以下。
×:表示该有害物质至少在该部件的某一均质材料中的含量超出GB/T
26572规定的限量要求。
基于中国标准法的参考规格:JIS B 1404
部件名称
有害物质
铅
(Pb)
汞
(Hg)
镉
(Cd)
六价铬
(Cr(VI))
多溴联苯
(PBB)
多溴
二苯醚
(PBDE)
电磁离
合器、
制动器
定子组装 × ○ ○ ○ ○ ○
转子组装 × ○ ○ ○ ○ ○

5. Torque adjustment
The relation of torque and exciting current is almost proportional as shown
in Fig. 3, and therefore by adjusting the current, the torque can be easily
adjusted.
Set to a proper value in consideration of the finish of the product or
working condition.
Fig.3 Exciting current vs. torque characteristics
(representative examples)
Use within rated torque.
If used over the rated torque, not only the
performance deteriorates, but also mechanical
breakage or injury may be caused. Hence, use with
rated torque. In particular, it must be noted that a
torque over the rating may be cause even if used at
the rated current, and therefore check the current-
torque characteristic, and adjust the exciting current.
(In the course of use, the torque gradually declines,
and therefore in manufacturing, a proper allowance
is considered initially.)
Use within the allowable heat dissipation.
If used over allowable heat dissipation, the clutch
may be extremely heated, and the working surface
may be extremely hot and red. As a result, a fire may
be caused. In addition, the performance may be
deteriorated. Be sure to use within the allowable heat
dissipation (refer to Fig. 4).
0
0
0.2
0.4
0.6
0.8
1.0
1.2
Exciting current (A)
Torque (N·m)
ZKB-0.06AN/YN
0.50.40.30.20.1
0
2
4
6
8
10
00.80.60.40.2
Exciting current (A)
Torque (N·m)
ZKB-0.6AN/YN
ZKB-0.3AN
ZKB-0.3YN
0
01234
100
200
300
ZKB-10BN/XN
ZKB-20BN/XN
Exciting current (A)
Torque (N·m)
0
0
10
30
40
20
Torque (N·m)
ZKB-2.5BN/XN
ZKB-1.2BN/XN
1.51.00.5
Exciting current (A)
012
0
10
30
40
20
50
70
80
60
Torque (N·m)
ZKB-5BN/XN
Exciting current (A)
0
01234
100
200
300
400
500
600
Exciting current (A)
Torque (N·m)
ZKB-40BN/XN
Fig.4 Allowable continuous heat dissipation characteristics
6. Maintenance
Check the following items.
Turn off the power, and make sure rotating elements are
stopped.
Never work while rotating, or it may cause injury. When
checking, turn off the power source, and make sure the
rotating elements are stopped still. At this time, be careful
not to have fingers or hand pinched.
10
30
50
0 1000 1800
20
40
60
80
0
70
Allowable continuous heat
dissipation (W)
Input rotation speed (r/min)
ZKB-0.6AN/YN
ZKB-0.3AN/YN
ZKB-0.06AN/YN
01000 1800
500 1500
100
200
0
400
300
Input rotation speed (r/min)
Allowable continuous heat
dissipation (W)
ZKB-5BN/XN
ZKB-2.5BN/XN
ZKB-1.2BN/XN
200
600
1000
0 1000 1800
400
800
1200
0
1400
500 1500
Input rotation speed (r/min)
Allowable continuous heat
dissipation (W)
ZKB-40BN/XN
ZKB-20BN/XN
ZKB-10BN/XN
1) When the powder is moist, the expected performance may not be
exhibited.
Be careful not to admit water or oily material inside the clutch.
In particular, if used near the gear box, the oil may invade through the
shaft, and therefore perfect oil sealing is advised.
2) The powder replacement timing cannot be indicated clearly because
the powder life varies depending on the conditions of use (slip rotation
speed, heat dissipation). Judge the replacement timing when the torque
decreases to 70% or less of the initial value. However, it is actually
difficult to check the torque.
Even if the torque has decreased, it increases when the exciting current
increases. Therefore, if the specified torque cannot be obtained at the
rated current, replace the powder.
To replace the powder, please contact our service network.
3) Check the coupling mounting bolts and others for looseness.
7. Troubleshooting
In the event of a serious trouble or when replacing parts, call our agent,
service center, or sales office, by specifying the manufacturing serial number
together with the type name of the clutch.
For repair or disassembly services, please call our designated service
network.
Mitsubishi Electric is not responsible for any damage or trouble caused by
repair, disassembly or modification of the product by any third party other
than Mitsubishi or specified agent.
When disposing of this product at the end of its
service life, please follow local and national guideline
for the disposal of industrial products.
Trouble Cause Remedy
Torque output is low.
Torque is not
generated by
passing exciting
current.
Insufficient running-
in.
Powder is moistened
by water or oil.
Deterioration of
powder.
Run in again.
Change powder.
Torque is generated
without passing
current.
Torque fluctuates on
every rotation.
Defective bearing.
Deterioration or
sintering of powder.
Replace bearing.
Change powder.
Surface temperature
exceeds 90°C
(spontaneous
cooling).
Overload. Relax the conditions
of use.
Surface temperature
exceeds 70°C
(forced cooling).
Overload
Insufficient air flow
rate.
Relax the conditions
of use.
Increase air flow
rate.
Use thermometer when measuring temperature.
Don't touch directly by hand to avoid burns. Turn off
the power source, and make sure the rotating
elements are stopped still, and measure with
thermometer.
Measure promptly.
8. Specification
Rated voltage: DC24V
(Notes)
1) The bearing is a special product manufactured in consideration of heat resistance and others for making the best of the powder clutch characteristic.
2) The air pressure is a reference value.
Type
Specification
ZKB-
0.06AN
0.06YN
ZKB-
0.3AN
0.3YN
ZKB-
0.6AN
0.6YN
ZKB-
1.2BN
1.2XN
ZKB-
2.5BN
2.5XN
ZKB-
5BN
5XN
ZKB-
10BN
10XN
ZKB-
20BN
20XN
ZKB-
40BN
40XN
Torque (N•m) 0.6 3 6 12 25 50 100 200 400
Rated current (A/75°C) 0.46 0.53 0.81 0.94 1.24 2.15 2.4 2.7 3.5
Coil resistance (/75°C) 52.1 45.1 29.7 25.6 19.3 11.2 10.0 8.9 6.9
Coil insulation resistance 10 Mor more by DC 500 V insulation resistance tester, at ordinary temperature and humidity
Powder mass (g) 3.5 7.5 10 20 33 60 140 225 370
Product mass (kg)
AN/BN 1.8 3.3 4.0 5.5 10 16 37 58 108
YN/XN 1.7 3.1 3.7 5.2 9.0 14.5 34 53 100
Bearing 6000 6202 6202 6003 6005 6206 6307 6308 6310
Allowable continuous heat dissipation (W)
(During spontaneous cooling) Refer to fig. 4
Forced air-cooling maximum
continuous heat dissipation
Air pressure (104Pa) - - - 3 5106 520
Air flow rate (m3/min) - - - 0.2 0.4 0.6 1.1 1.6 2.0
Heat dissipation (W) - - - 250 380 700 1100 1900 2800
Bracket tightening bolt strength Strength division II column 7T or equivalent of JIS B 1051 for mechanical properties of bolts and machine
screws.
Tightening torque (N•m) 5.5 to 7.0 8.0 to 13.5 39 to 65 65 to 109
Allowable rotating speed (r/min) 1800
9. Others
1) In the product having a three-digit figure attached to the model name such
as 001 in ZKB-5BN-001, the mounting dimensions, voltage and other
conditions are special, and may differ from the description herein, but the
basic operation and handling cautions are common.
2) The structural diagrams are representative examples, and may differ
depending on the model and options including the specification. Inquire us
for details.
「电器电子产品有害物质限制使用标识要求」的表示方式
Note: This symbol mark is for China only.
含有有害6物质的名称，含有量，含有部品
本产品中所含有的有害6物质的名称，含有量，含有部品如下表
所示。
产品中有害物质的名称及含量
本表格依据SJ/T 11364的规定编制。
○:表示该有害物质在该部件所有均质材料中的含量均在GB/T
26572规定的限量要求以下。
×:表示该有害物质至少在该部件的某一均质材料中的含量超出GB/T
26572规定的限量要求。
基于中国标准法的参考规格:JIS B 1404
部件名称
有害物质
铅
(Pb)
汞
(Hg)
镉
(Cd)
六价铬
(Cr(VI))
多溴联苯
(PBB)
多溴
二苯醚
(PBDE)
电磁离
合器、
制动器
定子组装 × ○ ○ ○ ○ ○
转子组装 × ○ ○ ○ ○ ○

JZ990D43001E
How to obtain manuals
How to obtain manuals
For product manuals or documents, consult with the Mitsubishi Electric dealer
from who you purchased your product.
Registration
The company names and product names described in this manual are the
trademarks or registered trademarks of their respective companies.
Safety Precaution (Read these precautions before use.)
This manual classifies the safety precautions into two categories:
and .
Depending on the circumstances, procedures indicated by may
also cause severe injury.
It is important to follow all precautions for personal safety.
In case of trouble, in spite of our best efforts in quality control, it may be
assumed to cause continuous running state due to failure of the clutch and
the brake, and hence it is advised to pay sufficient consideration to safety
measures at the machine side.
Store this manual carefully so that it can be referred to when required, and
make sure to send it to the end user.
Indicates that incorrect handling may cause
hazardous conditions, resulting in death or severe
injury.
Indicates that incorrect handling may cause
hazardous conditions, resulting in medium or slight
personal injury or physical damage.
Use protective cover.
The rotating elements are exposed outside, and the
hand or part of body may be injured if touching the
product. Install a protective cover, allowing smooth
ventilation, so that part of the body may not be in
contact with the machine. It is also recommended to
provide with a safety mechanism to stop the rotating
elements immediately when the cover is opened.
Mitsubishi Electric is not responsible for any damage or trouble caused by
repair, disassembly or modification of the product by any third party other than
Mitsubishi or specified agent.
For repair or disassembly services, therefore, please call the service network of
Mitsubishi.
Warranty
Exclusion of loss in opportunity and secondary loss from warranty liability
Regardless of the gratis warranty term, Mitsubishi shall not be liable for
compensation to:
(1) Damages caused by any cause found not to be the responsibility of Mitsubishi.
(2) Loss in opportunity, lost profits incurred to the user by Failures of Mitsubishi
products.
(3) Special damages and secondary damages whether foreseeable or not,
compensation for accidents, and compensation for damages to products other
than Mitsubishi products.
(4) Replacement by the user, maintenance of on-site equipment, start-up test run
and other tasks.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in a
device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
Mitsubishi Electric.
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
1. Cautions before use
1) The powder is contained inside, and hence never give impact or incline the
product.
2) Don’t leave the product in a damp place.
3) Don’t pull or tear the lead wire, and handle with care.
Never use the unit in an atmosphere in which
inflammation or explosion is expected.
While slipping, a spark may be ignited on the internal
working surface. Never use in a flammable or explosive
atmosphere with oil or grease. Use pressure-proof and
explosion-proof type. Enclose the main body when using
near flammable material such as cotton. When enclosed,
however, it must be noted that the allowable heat
dissipation is lowered.
Keep the product away from water, oil, and grease.
Not only the working surface but also the product main
body should be protected from water, oil, and grease. If
water, oil, or grease is on the main body, it may flow to the
working surface and may remarkably lower the torque. As
a result, the machine may not stop at the specified point
due to inertial run, or may run at an abnormal speed.
Such abnormal operation of the machine may cause injury.
Check the environments.
Never use in a place exposed to dust, high temperature,
dew condensation, rain and wind, oil mist. Don't install
directly in a place exposed to vibration or impact. Or it
may lead to damage or malfunction of the product or
deterioration of performance.
This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Never suspend the product by holding the leadwire.
Or the lead wire may be broken and the product may drop
to cause injury.
Hold the product itself when attaching or detaching.
If the product is not used for a long time, store the clutch
at a non-humid place, or take measures to protect the
clutch from moisture.
If the inside of the product is moistened, the product may
be corroded and operation may not be possible, or the
performance may be deteriorated.
2. Structure and principle of operation
The clutch structure is shown in Fig. 1. The drive member linked to the input side and the driven member linked to the output side are disposed concentrically
across a powder gap.
The powder gap is filled with powder (magnetic iron powder), and the coil for passing a magnetic flux to the powder is built in the stator, and it is designed to feed
direct current from outside through the lead wire.
Meanwhile, the ZKB-0.3, 0.6AN/YN type are not provided with stator, and formed in one body with the bracket.
The brake has the driven member and exciting coil unit integrated into one body as shown in Fig. 2.
While the drive member is rotating, when a current flows in the coil, a magnetic flux is generated as indicated by broken line in the drawing, and the powder is
linked like a chain along the magnetic flux, and its coupling force the driven member is driven, and the torque is transmitted to the output side.
When the exciting current is cut off, the magnetic flux disappears, and the coupling force of the powder is eliminated, thereby cutting of transmission of powder to
the driven member.
Fig. 1 Structural diagrams of ZKB powder clutches
(representative examples)
Seal
Exciting coil
Lead wire
Magnetic flux
Input side bracket (stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Output side bracket
(stationary element)
Drive plate
Driven member
Output shaft
(rotating element)
Bearing Bearing
(ZKB-0.06 to 0.6AN type)
(ZKB-1.2 to 40BN type)
Exciting coil Magnetic flux
Input side bracket
(stationary element)
Input shaft
(rotation element)
Snap ring
Stator (stationary element)
Seal Bearing Bearing
Snap ring
Output shaft
(rotating element )
Lead wire
Output side bracket
(stationary element)
Drive plate
Driven member
Bearing
Powder gap
Drive member
Fig. 2 Structural diagrams of ZKB powder brakes
(representative examples)
(ZKB-1.2 to 40XN type)
(ZKB-0.06 to 0.6YN type)
Exciting coil
Lead wire
Magnetic flux
Input side bracket (stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Stator (stationary element)
Drive plate
Driven member
Fixed side bracket
(stationary element)
Bearing
Seal
Exciting coil
Lead wire
Magnetic flux
Input side bracket
(stationary element)
Powder gap
Drive member
Input shaft
(rotation element)
Snap ring
Drive plate
Driven member
Fixed side bracket
(stationary element)
Bearing
Seal
3. Assembling of clutch, brake
(Note)
The hoist operation by using the eyebolts should be done by a qualified operator.
1) Make sure there is enough clearance when installing the product to prevent
impact and undue force from being applied to the product during assembly
work.
2) Use the powder clutch in the regular installation status in which the high-
speed rotation side is located as the input side. (The nameplate indicates
the input side and output side with arrows.)
Install both the clutch and brake so that the shafts become horizontal.
3) For coupling with the load shaft, use an elastic coupling.
4) For pulley coupling, pay attention to the belt tension, and never apply initial
tension more than necessary.
5) The voltage polarity is not specified.
Turn off the power, and make sure rotating elements are
stopped.
Never work while rotating, or it may cause electric shock
or injury. When mounting, dismounting, or adjusting, turn
off the power source, and make sure the rotating
elements are stopped still. At this time, be careful not to
have fingers or hand pinched.
Tighten bolts to specified torque, and lock securely.
Depending on the degree of tightening, the bolts may be
broken to cause injury. Using specified bolt material,
tighten bolts to specified torque, and lock securely with
adhesive, spring washer or the like as specified. Besides,
since the parts composing the product rotate relatively to
each other, the tightened parts must be fixed securely for
the safety of operation.
The bolt strength and tightening torque are designated in
the specification.
Connect lead wires securely.
Otherwise it may lead to an electric shock.
Connect securely, both electrically and mechanically, and
insulate appropriately.
Be sure to connect a surge absorber parallel to the
exciting coil to cut off the direct current.
Cutting off the current may cause a large surge voltage,
and the surge voltage may deteriorate the peripheral
units.
For this reason, be sure to use a surge absorber, such as
a diode, varistor, and protective resister.
Use wire size suited to current capacity.
If wire of smaller current capacity is used, the insulating
coating may melt down to cause insulation failure,
possibly leading to electric shock, current leak, or fire.
The specified current of the product is designated in the
specification.
Mount, dismount, and transport with greatest care.
Carrying of a heavy product may cause lumbago or injury
by dropping.
Be careful sufficiently when mounting, dismounting, or
transporting.
In particular, handle the product provided with eyebolts by
using a hoist or the like.
4. Operation
If a shock is applied to the clutch during transportation, powder may be
scattered inside the clutch. For this reason, before starting regular
operation, perform running-in while following the procedure below to
collect powder into the powder gap, if necessary.
In addition, if the powder is replaced, be sure to perform running-in.
When performing forced-air cooling, confirm that a completely deoiling/
dewatering type air filter is attached to the air introduction area.
1) Running-in procedure
Fix the output shaft to prevent rotation. (If it is difficult to fix the shaft,
apply a heavy load to prevent rotation of the output shaft.)
After that, without flowing the exciting current, rotate the drive member
at approximately 200 r/min for 1 minute, and then set the exciting
current to 1/4 to 1/2 of the rated value. While rotating the drive
member, flow the exciting current for 5 seconds, and then stop flowing
the current for 10 seconds. Repeat this cycle approximately 10 times.
2) End of running-in
While the running-in is insufficient, the torque output may be low or the
torque may fluctuate, but as the running-in becomes sufficient and the
powder comes to work effectively, a stable torque corresponding to the
exciting current is produced.
After the running-in, start regular operation.
Depending on the conditions of use, the stator surface temperature may rise
considerably, but be sure to observe strictly the surface temperature
regulation of 100°C or less in the case of spontaneous cooling, or 70°C or
less in the case of forced air cooling.
If the surface temperature exceeds the limit, relax the operation conditions,
and prevent overheat of the clutch and brake.
In forced air cooling, in particular, continue to feed air at specified flow rate
until the stator surface temperature becomes equal to the ambient
temperature after the operation is stopped. For the sake of prevention of
moisture, however, it is not favorable to continue to feed air after the surface
temperature is equalized with the ambient temperature.
The above-described surface temperature is a reference value. Be sure to
use the clutch within the allowable heat dissipation.
(Herein, the surface temperature is mentioned on the basis of the ambient
temperature of 30°C. The allowable ambient temperature range is 0 to 40°C.)
Never touch the product during operation.
The rotating elements are exposed outside, and the
hand or part of body may be injured if touching the
product. Install a protective cover, allowing smooth
ventilation, so that the hand or fingers may not be in
contact with the machine during operation, and also
a safety mechanism to stop the rotating elements
immediately when the cover is opened.
Never increase the rotating speed more than
allowable.
If the rotating speed is raised more than allowable,
vibration increases to cause breakage and scattering
of powder, and it is very dangerous. Rotate within
allowable speed, and install protective cover.
Use thermometer when measuring temperature.
Don't touch directly by hand to avoid burns. Turn off
the power source, and make sure the rotating
elements are stopped still, and measure with
thermometer.
Measure promptly.
MODEL
ZKB-AN, ZKB-BN
ZKB-YN, ZKB-XN
INSTRUCTION MANUAL
This manual describes the part names, dimensions, mounting, and specifications
of the product. Before use, read this manual and the manuals of all relevant
products fully to acquire proficiency in handling and operating the product. Make
sure to learn all the product information, safety information, and precautions.
Store this manual in a safe place so that it can be taken out and read whenever
necessary. Always forward it to the end user.
Effective May 2018
Specifications are subject to change without notice.
2006 MITSUBISHI ELECTRIC CORPORATION
Manual Number JZ990D43001
Revision E
Date May 2018

5. Torque adjustment
The relation of torque and exciting current is almost proportional as shown
in Fig. 3, and therefore by adjusting the current, the torque can be easily
adjusted.
Set to a proper value in consideration of the finish of the product or
working condition.
Fig.3 Exciting current vs. torque characteristics
(representative examples)
Use within rated torque.
If used over the rated torque, not only the
performance deteriorates, but also mechanical
breakage or injury may be caused. Hence, use with
rated torque. In particular, it must be noted that a
torque over the rating may be cause even if used at
the rated current, and therefore check the current-
torque characteristic, and adjust the exciting current.
(In the course of use, the torque gradually declines,
and therefore in manufacturing, a proper allowance
is considered initially.)
Use within the allowable heat dissipation.
If used over allowable heat dissipation, the clutch
may be extremely heated, and the working surface
may be extremely hot and red. As a result, a fire may
be caused. In addition, the performance may be
deteriorated. Be sure to use within the allowable heat
dissipation (refer to Fig. 4).
0
0
0.2
0.4
0.6
0.8
1.0
1.2
Exciting current (A)
Torque (N·m)
ZKB-0.06AN/YN
0.50.40.30.20.1
0
2
4
6
8
10
00.80.60.40.2
Exciting current (A)
Torque (N·m)
ZKB-0.6AN/YN
ZKB-0.3AN
ZKB-0.3YN
0
01234
100
200
300
ZKB-10BN/XN
ZKB-20BN/XN
Exciting current (A)
Torque (N·m)
0
0
10
30
40
20
Torque (N·m)
ZKB-2.5BN/XN
ZKB-1.2BN/XN
1.51.00.5
Exciting current (A)
012
0
10
30
40
20
50
70
80
60
Torque (N·m)
ZKB-5BN/XN
Exciting current (A)
0
01234
100
200
300
400
500
600
Exciting current (A)
Torque (N·m)
ZKB-40BN/XN
Fig.4 Allowable continuous heat dissipation characteristics
6. Maintenance
Check the following items.
Turn off the power, and make sure rotating elements are
stopped.
Never work while rotating, or it may cause injury. When
checking, turn off the power source, and make sure the
rotating elements are stopped still. At this time, be careful
not to have fingers or hand pinched.
10
30
50
0 1000 1800
20
40
60
80
0
70
Allowable continuous heat
dissipation (W)
Input rotation speed (r/min)
ZKB-0.6AN/YN
ZKB-0.3AN/YN
ZKB-0.06AN/YN
01000 1800
500 1500
100
200
0
400
300
Input rotation speed (r/min)
Allowable continuous heat
dissipation (W)
ZKB-5BN/XN
ZKB-2.5BN/XN
ZKB-1.2BN/XN
200
600
1000
0 1000 1800
400
800
1200
0
1400
500 1500
Input rotation speed (r/min)
Allowable continuous heat
dissipation (W)
ZKB-40BN/XN
ZKB-20BN/XN
ZKB-10BN/XN
1) When the powder is moist, the expected performance may not be
exhibited.
Be careful not to admit water or oily material inside the clutch.
In particular, if used near the gear box, the oil may invade through the
shaft, and therefore perfect oil sealing is advised.
2) The powder replacement timing cannot be indicated clearly because
the powder life varies depending on the conditions of use (slip rotation
speed, heat dissipation). Judge the replacement timing when the torque
decreases to 70% or less of the initial value. However, it is actually
difficult to check the torque.
Even if the torque has decreased, it increases when the exciting current
increases. Therefore, if the specified torque cannot be obtained at the
rated current, replace the powder.
To replace the powder, please contact our service network.
3) Check the coupling mounting bolts and others for looseness.
7. Troubleshooting
In the event of a serious trouble or when replacing parts, call our agent,
service center, or sales office, by specifying the manufacturing serial number
together with the type name of the clutch.
For repair or disassembly services, please call our designated service
network.
Mitsubishi Electric is not responsible for any damage or trouble caused by
repair, disassembly or modification of the product by any third party other
than Mitsubishi or specified agent.
When disposing of this product at the end of its
service life, please follow local and national guideline
for the disposal of industrial products.
Trouble Cause Remedy
Torque output is low.
Torque is not
generated by
passing exciting
current.
Insufficient running-
in.
Powder is moistened
by water or oil.
Deterioration of
powder.
Run in again.
Change powder.
Torque is generated
without passing
current.
Torque fluctuates on
every rotation.
Defective bearing.
Deterioration or
sintering of powder.
Replace bearing.
Change powder.
Surface temperature
exceeds 90°C
(spontaneous
cooling).
Overload. Relax the conditions
of use.
Surface temperature
exceeds 70°C
(forced cooling).
Overload
Insufficient air flow
rate.
Relax the conditions
of use.
Increase air flow
rate.
Use thermometer when measuring temperature.
Don't touch directly by hand to avoid burns. Turn off
the power source, and make sure the rotating
elements are stopped still, and measure with
thermometer.
Measure promptly.
8. Specification
Rated voltage: DC24V
(Notes)
1) The bearing is a special product manufactured in consideration of heat resistance and others for making the best of the powder clutch characteristic.
2) The air pressure is a reference value.
Type
Specification
ZKB-
0.06AN
0.06YN
ZKB-
0.3AN
0.3YN
ZKB-
0.6AN
0.6YN
ZKB-
1.2BN
1.2XN
ZKB-
2.5BN
2.5XN
ZKB-
5BN
5XN
ZKB-
10BN
10XN
ZKB-
20BN
20XN
ZKB-
40BN
40XN
Torque (N•m) 0.6 3 6 12 25 50 100 200 400
Rated current (A/75°C) 0.46 0.53 0.81 0.94 1.24 2.15 2.4 2.7 3.5
Coil resistance (/75°C) 52.1 45.1 29.7 25.6 19.3 11.2 10.0 8.9 6.9
Coil insulation resistance 10 Mor more by DC 500 V insulation resistance tester, at ordinary temperature and humidity
Powder mass (g) 3.5 7.5 10 20 33 60 140 225 370
Product mass (kg)
AN/BN 1.8 3.3 4.0 5.5 10 16 37 58 108
YN/XN 1.7 3.1 3.7 5.2 9.0 14.5 34 53 100
Bearing 6000 6202 6202 6003 6005 6206 6307 6308 6310
Allowable continuous heat dissipation (W)
(During spontaneous cooling) Refer to fig. 4
Forced air-cooling maximum
continuous heat dissipation
Air pressure (104Pa) - - - 3 5106 520
Air flow rate (m3/min) - - - 0.2 0.4 0.6 1.1 1.6 2.0
Heat dissipation (W) - - - 250 380 700 1100 1900 2800
Bracket tightening bolt strength Strength division II column 7T or equivalent of JIS B 1051 for mechanical properties of bolts and machine
screws.
Tightening torque (N•m) 5.5 to 7.0 8.0 to 13.5 39 to 65 65 to 109
Allowable rotating speed (r/min) 1800
9. Others
1) In the product having a three-digit figure attached to the model name such
as 001 in ZKB-5BN-001, the mounting dimensions, voltage and other
conditions are special, and may differ from the description herein, but the
basic operation and handling cautions are common.
2) The structural diagrams are representative examples, and may differ
depending on the model and options including the specification. Inquire us
for details.
「电器电子产品有害物质限制使用标识要求」的表示方式
Note: This symbol mark is for China only.
含有有害6物质的名称，含有量，含有部品
本产品中所含有的有害6物质的名称，含有量，含有部品如下表
所示。
产品中有害物质的名称及含量
本表格依据SJ/T 11364的规定编制。
○:表示该有害物质在该部件所有均质材料中的含量均在GB/T
26572规定的限量要求以下。
×:表示该有害物质至少在该部件的某一均质材料中的含量超出GB/T
26572规定的限量要求。
基于中国标准法的参考规格:JIS B 1404
部件名称
有害物质
铅
(Pb)
汞
(Hg)
镉
(Cd)
六价铬
(Cr(VI))
多溴联苯
(PBB)
多溴
二苯醚
(PBDE)
电磁离
合器、
制动器
定子组装 × ○ ○ ○ ○ ○
转子组装 × ○ ○ ○ ○ ○