Oriental motor SMK Series User manual

1
Introduction
Before use
Only qualied personnel of electrical and mechanical engineering should
work with the product.
Use the product correctly after thoroughly reading the section“Safety
precautions.” In addition, be sure to observe the contents described in
warning, caution, and note in this manual.
The product described in this manual is designed and manufactured to
be incorporated in general industrial equipment. Do not use for any other
purpose. Oriental Motor Co., Ltd. is not responsible for any compensation for
damage caused through failure to observe this warning.
Safety precautions
The precautions described below are intended to ensure the safe and correct
use of the product, and to prevent the customer and others from exposure
to the risk of injury. Use the product only after carefully reading and fully
understanding these instructions.
Description of signs
Handling the product without observing the instructions
that accompany a“WARNING”symbol may result in
serious injury or death.
Handling the product without observing the instructions
that accompany a“CAUTION”symbol may result in injury
or property damage.
The items under this heading contain important handling
instructions that the user should observe to ensure the
safe use of the product.
Description of graphic symbols
Indicates “prohibited”
actions that must not be
performed.
Indicates “compulsory”
actions that must be
performed.
yDo not use the motor in explosive or corrosive environments, in
the presence of ammable gases, in places subjected to splashing
water, or near combustibles. Doing so may result in re or injury.
yDo not forcibly bend, pull or pinch the motor lead wire or cable.
Doing so may result in re.
yDo not disassemble or modify the motor. Doing so may result in
injury.
yBe sure to insulate the connection terminals of the capacitor and
external resistor. Failure to do so may result in electric shock.
yDo not touch the connection terminals of the motor or capacitor
immediately (within 30 seconds) after the power is turned o. The
residual voltage may cause electric shock.
yAssign qualied personnel to the task of installing, wiring,
operating/controlling, inspecting and troubleshooting the motor.
Failure to do so my result in re or injury.
yTurn o the power in the event of a power failure. Otherwise, the
motor may suddenly start when the power is restored, causing
injury or damage to equipment.
yInstall the motor inside an enclosure. Failure to do so may result in
injury.
HM-60358-2
OPERATING MANUAL Thank you for purchasing an Oriental Motor product. This Operating Manual
describes product handling procedures and safety precautions.
yPlease read it thoroughly to ensure safe operation.
yAlways keep the manual where it is readily available.
Low-Speed Synchronous Motor
SMK Series
yTake measures to keep the moving part in position if the product is
used in vertical operations such as elevating equipment. Failure to
do so may result in injury or damage to equipment.
yConnect the motor securely in accordance with the connection
example. Failure to do so may result in re.
yFor a power supply for DC excitation, use a DC power supply with
reinforced insulation on its primary and secondary sides. Failure to
do so may result in electric shock.
yDo not use the motor beyond its specications. Doing so may result
in injury or damage to equipment.
yDo not touch the motor and external resistor during operation or
immediately after stopping. Doing so may result in a skin burn(s).
yDo not carry the motor by holding the motor output shaft, motor
lead wires or cable. Doing so may cause injury.
yDo not use the motor near ammable objects. Doing so may result
in re or a skin burn(s).
yDo not leave anything around the motor that would obstruct
ventilation. Doing so may result in damage to equipment.
yDo not touch the rotating part (output shaft) during operation.
Doing so may cause injury.
yProvide a cover over the rotating parts (output shaft) of the motor.
Failure to do so may result in injury.
yProvide an emergency stop device or emergency stop circuit
external to the equipment so that the entire equipment will
operate safely in the event of a system failure or malfunction.
Failure to do so may result in injury.
yImmediately when a problem occurred, stop operation and turn o
the power supply. Failure to do so may result in re or injury.
yThe motor surface temperature may exceed 70 °C
(158 °F) even under normal operating conditions.
If the operator is allowed to approach the motor in
operation, ax a warning label shown in the gure
on a conspicuous position. Failure to do so may
result in skin burn(s).
Warning label
Precautions for use
•Do not give any constraint to the motor output shaft.
If the motor output shaft is constrained with a load torque exceeding the
motor torque, the motor cannot be started and a vibrating condition will
occur, resulting in a signicant decrease in motor life. Be sure to use a load
torque that is less than the motor torque.
•Grease leakage
On rare occasions, a small amount of grease may ooze out from the geared
motor. If there is concern over possible environmental damage resulting from
the leakage of grease, check for grease stains during regular inspections.
Alternatively, install an oil pan or other device to prevent leakage from
causing further damage. Oil leakage may lead to problems in the customer's
equipment or products.
•Allowable torque
Operate the motor by making sure the sum of the acceleration/deceleration
torque at the starting/stopping of the motor and the load (friction) torque
doesn’t exceed the allowable torque. Operating the motor in excess of the
allowable torque may result in a damaged gear part.

2
Preparation
Checking the product
Verify that the items listed below are included. Report any missing or
damaged items to the Oriental Motor sales oce from which you purchased
the product.
yMotor ...................................... 1 unit
yMounting screw .................. 4 pcs. (Included with geared motor)
yCapacitor................................ 1 pc.
yCapacitor cap ....................... 1 pc. *
yExternal resistor................... 1 pc. (Included with the SMK5 type)
yOPERATING MANUAL ........ 1 copy (this document)
* Included with the capacitor that has UL in the model name.
Information about included capacitor and external resistor
Motor model Capacitor External resistor
Model Capacitance (μF) Ω W
SMK014K-A
SMK014K-B CH120 12 − −
SMK014A-A
SMK014A-B
SMK014MA-A
SMK014MA-B
SMK0A-A*
SMK0A-B*
CH06BFAUL 0.6 − −
SMK237A-A
SMK237A-B
SMK216A-GN
SMK216A-GNB
CH12UL 1.2 − −
SMK5100A-A
SMK5100A-B
SMK5160A-A
SMK5160A-B
CH25UL 2.5 400 30
SMK5100C-A
SMK5100C-B CH06BUL
0.6 1,500 30
SMK550A-GN
SMK550A-GNB 0.6 400 30
SMK550C-GN
SMK550C-GNB CH035B 0.35 2,000 30
* The box () in the model name indicates a number representing the gear ratio.
Installation
Installation location
The motor is designed and manufactured to be incorporated in equipment.
Install it in a well-ventilated location that provides easy access for inspection.
The location must also satisfy the following conditions:
yInside an enclosure that is installed indoors (provide vent holes)
yOperating ambient temperature −10 to +40 °C (+14 to +104 °F)
(non-freezing)
yOperating ambient humidity 85 % or less (non-condensing)
yArea free of explosive atmosphere or toxic gas (such as sulfuric gas) or
liquid
yArea not exposed to direct sun
yArea free of excessive amount of dust, iron particles or the like
yArea not subject to splashing water (rain, water droplets), oil (oil droplets)
or other liquids
yArea free of excessive salt
yArea not subject to continuous vibrations or excessive shocks
yArea free of excessive electromagnetic noise (from welders, power
machinery, etc.)
yArea free of radioactive materials, magnetic elds or vacuum
y1,000 m (3,300 ft.) or lower above sea level
Installation method
Install the motor onto an appropriate at metal plate having excellent
vibration resistance and heat conductivity. When installing the motor, secure
it with screws so that there is no gap between the motor and metal plate.
zRound shaft type
Using the four mounting holes (or screw holes) on the motor mounting
surface, secure the motor with four screws (not included).
Fit the pilot on the motor mounting surface into a ange pilot.
•SMK0 type
Flange pilot
Mounting plate
Scr
ew holes
•SMK2, SMK5 types
Mounting plate
Mounting
holes
Flange pilot
Motor type Nominal size Tightening torque [N•m (oz-in)]
SMK0 type M3 1 (142)
SMK2 type M4 2 (280)
SMK5 type M5 3 (420)
zPinion shaft type
Assemble a gearhead (sold separately) with a motor. Match the pilot of the
gearhead and motor, and assemble them while slowly turning the gearhead
clockwise/counterclockwise.
And secure with the screw set included with the gearhead using four
mounting holes on the motor frame.
Fit the mounting boss on the gearhead mounting surface into the mounting
boss tting.
Mounting plate
Sc
rews
Hexagonal
nuts
Mounting boss tting
Gearhead
(sold separately)
Motor
Pilot
Mounting holes
Pinion shaft
Mounting boss
Washers
Do not assemble the motor and gearhead forcibly, nor bring the pinion
shaft into forcible contact with the gearhead’s side plate or gear. This
precaution must be observed in order to avoid abnormal noise or
reduced service life in the gearhead.
Combinations of motors and gearheads (sold separately)
Use the pinion shaft type in combination with the following gearhead:
Motor model Applicable gearhead model
(sold separately) *
SMK216A-GN, SMK216A-GNB 2GNK, 2GNS
SMK550A-GN, SMK550A-GNB 5GNK, 5GNS
SMK550C-GN, SMK550C-GNB
* The box () in the gearhead model indicates a number representing the gear
ratio.

3
zGeared motor (SMK0A type)
Use four screw holes on the motor mounting surface to secure with the
included mounting screws.
yNominal size: M3
yTightening torque: 1 N·m (142 oz-in)
Cross-recessed head machine screws
with spring washer (included)
Mounting plate
Flange pilot
Screw holes
Installing the capacitor
Use a M4 screw (not included) to install the capacitor securely.
Tightening torque: 1 N·m (142 oz-in) or less
Capacitor
M4 screw
•Type with mounting leg •Type with mounting bracket
M4 screws
Capacitor
Mounting leg
Mounting bracket
ø4.3 mm
(ø0.17 in.)
5×ø4.5 mm
(ø0.18 in.)
Installing a load
When installing a load to the motor, align the centers of the motor output
shaft and load shaft.
When installing a exible coupling or pulley on the motor output shaft, do so
without damaging the output shaft and bearings.
Permissible radial load and permissible axial load
The radial load and axial load on the motor output shaft must be kept under
the permissible values in the table.
Motor type
Permissible radial load [N (lb.)] Permissible
axial load
[N (lb.)]
Distance from the tip of output shaft [mm (in.)]
0 (0) 5 (0.2) 10 (0.39) 15 (0.59) 20 (0.79)
SMK014A
SMK014K
SMK014M
20 (4.5) 25 (5.6) 34 (7.6) 52 (11.7) − 10 (2.2)
SMK0A *
10 (2.2)
15 (3.3) 20 (4.5) 30 (6.7) − 15 (3.3)
SMK237
54 (12.1)
67 (15) 89 (20) 130 (29) − 20 (4.5)
SMK5100
SMK5160 260 (58) 290 (65) 340 (76) 390 (87) 480 (108) 60 (13.5)
* This table indicates the permissible radial load and permissible axial load of the
gearhead.
Connection
Installing the capacitor cap
If a capacitor cap is included with a
capacitor, pass the lead wires through the
capacitor cap before connecting them to
the capacitor terminals. Then, cover with
the capacitor cap.
Lead wires
Capacitor cap
Connection and operation
yBe sure to connect the included capacitor as shown in the gures.
An external resistor is also included in the SMK5 type. Be sure to connect it.
ySetting the switch to the CW side rotates the motor output shaft in the
clockwise direction. Setting the switch to the CCW side rotates the motor
output shaft in the counterclockwise direction. The rotation direction of the
motor output shaft indicates as viewed from the output shaft side.
yIf the power supply is turned o, the motor stops.
yThe output shaft of the pinion motors with ratios of 25, 30 and 36
rotate in the opposite direction of the motor output shaft.
yThe output shaft of the geared motors with ratios of 15, 18, 100 and
120 rotate in the opposite direction of the motor output shaft.
yBe sure to connect a CR circuit for surge suppression in order to
protect switches and contacts. It is also available in our products.
Check on the Oriental Motor Website for the model name.
SMK0 type
CW
L
N
CCW
CCWCW
Red
White
Blue
Capacitor
Motor
R0
C0
R0
C0
SMK2 type
CCWCW
Motor
CW
L
N
CCW
Red
Gray
Blue
Capacitor
R0
C0
R0
C0
SMK5 type
CCWCW
Capacitor External resistor
CW
L
N
CCW
Red
Gray
Blue
R0
C0
R0
C0
Motor
zAbout DC excitation
If a DC voltage is applied to the motor, a holding force larger than the holding
torque can be obtained. For details, check on the Oriental Motor Website.

4
yUnauthorized reproduction or copying of all or part of this manual is
prohibited.
yOriental Motor shall not be liable whatsoever for any problems relating
to industrial property rights arising from use of any information, circuit,
equipment or device provided or referenced in this manual.
yCharacteristics, specications and dimensions are subject to change without
notice.
yWhile we make every eort to oer accurate information in the manual,
we welcome your input. Should you nd unclear descriptions, errors or
omissions, please contact your nearest Oriental Motor sales oce.
yis a registered trademark or trademark of Oriental Motor
Co., Ltd., in Japan and other countries.
© Copyright ORIENTAL MOTOR CO., LTD. 2018
Published in January 2021
T
echnical Support Tel:[phone]
8:30am EST to 5:00pm PST
（M-F）
www
.orientalmotor.com
Schiessstraße 44, 40549 Düsseldor
f, Germany
T
echnical Support Tel:[phone]
www
.orientalmotor.de
T
el:[phone]
www
.oriental-motor.co.uk
T
el:[phone]
www
.orientalmotor.fr
T
el:[phone]
www
.orientalmotor.it
• Please contact your nearest Oriental Motor oce for further information.
4-8-1Higashiueno
,Taito-ku,Tokyo 110-8536
Japan
T
el:[phone]
www
.orientalmotor.co.jp
Tel:[phone]
www.orientalmotor.com.tw
Singapore
Tel:[phone]
www.orientalmotor.com.sg
Tel:[phone]
www.orientalmotor.com.my
Korea
Tel:[phone]
www.inaom.co.kr
Tel:[phone]
www.orientalmotor.co.th
Tel:[phone]
www.orientalmotor.com.cn
Tel:[phone] (For English)
1800-121-4149 (For Hindi)
www.orientalmotor.co.in
Maintenance/inspection
Inspection
It is recommended that periodic inspections would be conducted for the
items listed below after each operation of the motor. If an abnormal condition
is noted, discontinue any use and contact your nearest Oriental Motor sales
oce.
Inspection item
yCheck if any of the screws having installed the motor is loose.
yCheck if an unusual noise is generated from a bearing part (ball bearings) of
the motor.
yCheck if a damage or stress is applied on the motor lead wire or cable.
yCheck if the motor output shaft and the load shaft are out of alignment.
Warranty
Check on the Oriental Motor Website or General Catalog for the product
warranty.
Disposal
Dispose the product correctly in accordance with laws and regulations, or
instructions of local governments.
Specications and general specications
Check on the Oriental Motor Website for the product specications and
general specications.
Regulations and standards
The SMK014 type and SMK0A type are exempt from the UL Standards and
the CE Marking.
UL Standards
Applicable Standards Certication Body File No.
UL 1004-1, UL 1004-2
CSA C22.2 No.77
CSA C22.2 No.100
UL E64199
CE Marking
Motors of AC power input type are axed the CE Marking under the Low
Voltage Directive.
zLow Voltage Directive
Applicable Standard
EN 62368-1
Installation conditions (EN Standard)
yTo be incorporated in equipment.
yOvervoltage category: II
yPollution degree: 2
yProtection against electric shock: Class I
RoHS Directive
The products do not contain the substances exceeding the restriction values
of RoHS Directive (2011/65/EU).