Oriental motor K Ⅱ Series User manual

1
Introduction
 Before using the motor
Only qualied personnel 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 has been 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 damage caused
through failure to observe this warning.
Safety precautions
The precautions described below are intended to prevent danger or injury to
the user and other personnel through safe, correct use of the product. Use the
product only after carefully reading and fully understanding these instructions.
Warning
Handling the product without observing the instructions
that accompany a "Warning" symbol may result in serious
injury or death.
Caution
Handling the product without observing the instructions
that accompany a "Caution" symbol may result in injury or
property damage.
Note The items under this heading contain important handling
instructions that the user should observe to ensure safe use
of the product.
Warning
Do not use the product in explosive or corrosive environments, in the
presence of ammable gases, or near combustibles. Doing so may result in
re, electric shock or injury.
Only qualied and educated personnel should be allowed to perform
installation, connection, operation and inspection/troubleshooting of the
product. Handling by unqualied and uneducated personnel may result in
re, electric shock, injury or equipment damage.
Do not transport, install the product, perform connections or inspections
when the power is on. Always turn the power o before carrying out these
operations. Failure to do so may result in electric shock.
Turn o the power in the event the overheat protection device (thermal
protector) is triggered. Failure to do so may result in injury or damage to
equipment, since the motor will start abruptly when the overheat protection
device (thermal protector) is automatically reset.
The motor is ClassⅠequipment. Install the motor so as to avoid contact with
hands, or ground it to prevent the risk of electric shock.
Keep the input power voltage within the specied range. Failure to do so may
result in re or electric shock.
Securely connect the cables in accordance with the connection examples.
Failure to do so may result in re or electric shock.
Do not forcibly bend, pull or pinch the lead wire (cable). Doing so may result
in re and electric shock.
Insulate the connection terminals of the supplied capacitor using the
supplied capacitor cap. Failure to do so may result in electric shock.
Turn o the power in the event of a power failure. Or the motor may suddenly
start when the power is restored and may cause injury or damage to equipment.
Do not touch the connection terminal of the capacitor immediately after the
power is turned o (for a period of 30 seconds). The residual voltage may
cause electric shock.
Do not disassemble or modify the motor. This may cause electric shock or injury.
Caution
Do not use the motor beyond its specications. Doing so may result in electric
shock, injury or damage to equipment.
Do not touch the motor during operation or immediately after stopping. The
surface is hot and may cause a skin burn(s).
Do not lift the motor by holding the motor output shaft or motor lead wires.
Doing so may result in injury.
Keep the area around the motor free of combustible materials. Failure to do
so may result in re or a skin burn(s).
Do not leave anything around the motor that would obstruct ventilation.
Doing so may result in damage to equipment.
Do not touch the rotating part (output shaft) while operating the motor.
Doing so may result in injury.
When an abnormality is noted, turn o the power immediately. Failure to do
so may result in re, electrical shock or injury.
The motor surface temperature may exceed 70 °C (158 °F)
even under normal operating conditions. If the operator is
allowed to approach the running motor, attach a warning
label as shown in the gure in a conspicuous position.
Failure to do so may result in a skin burn(s). Warning label
Dispose the product correctly in accordance with laws and regulations, or
instructions of local governments.
Preparation
 Checking the product
Verify that the items listed below are included. Report any missing or damaged
items to the branch or sales oce from which you purchased the product.
 Motor ...................................................... 1 unit
The combination type comes with the motor and its dedicated gearhead
pre-assembled.
 Capacitor ............................................... 1 piece
 Capacitor cap ....................................... 1 piece
 Mounting screw set ........................... 1 set (only for combination type)
Hexagonal socket head screw, washer, spring washer 4 pieces each,
parallel key 1 piece
 OPERATING MANUAL ........................ 1 copy (this document)
 Checking the model name
Check the model names of the motor
and the gearhead against the model
name described on each nameplate.
The gures show the lead wire type.
Motor
Gearhead
Protective Earth
Terminal
: Enter a motor classication representing the power supply voltage.
JA: Single-phase 100 V 50/60 Hz JC: Single-phase 200 V 50/60 Hz
UA: Single-phase 110/115 V 60 Hz UC: Single-phase 220/230 V 60 Hz
GC: Single-phase 220/230 V 50 Hz
: Enter a number representing the gear ratio.
zCombination type
Lead wire type
Model Motor model Gearhead
model
Degree of
protection
2RK6-2RK6GV-2GVB
IP20
3RK15-3RK15GV-3GVB
4RK25-4RK25GV-4GVB
5RK40-5RK40GV-5GVB
5RK60-5RK60GVH-5GVHB
5RK90-5RK90GVR-5GVRB
Terminal Box Type
ModelMotor model Gearhead
model
Degree of
protection
4RK25T2-4RK25GV-T2 4GVBIP40
5RK40T2-5RK40GV-T2 5GVB
5RK60T2-5RK60GVH-T2 5GVHBIP20
5RK90T2-5RK90GVR-T2 5GVRB
For the product having changed the position of the terminal box, the code is
added at the end of the model name.
zRound shaft type
For the model name of the round shaft type, "A" is used instead of "GV", "GVH"
or "GVR" in the "motor model name," which indicates the motor shaft type.
HM-9355-7
O P E R AT I N G M A N U A L Thank you for purchasing an Oriental Motor product.
This Operating Manual describes product handling procedures and safety
precautions.
Please read it thoroughly to ensure safe operation.
Always keep the manual where it is readily available.
KⅡSeries Reversible motor

2
Installation
 Location for installation
Install it in a well-ventilated location that provides easy access for inspection.
Inside an enclosure that is installed indoors (provide vent holes)
Operating ambient temperature
Classication representing the power supply voltage
JA/JC: −10 to +50 °C (+14 to +122 °F) (non-freezing)
UA/UC/GC: −10 to +40 °C (+14 to +104 °F) (non-freezing)
The lowest temperature is 0 °C (+32 °F) for gearheads of the gear ratio 2 and 3.
Operating ambient humidity 85% or less (non-condensing)
Area that is free from an explosive atmosphere or toxic gas (such as sulfuric
gas) or liquid
Area not exposed to direct sun
Area free of excessive amount dust, iron particles or the like
Area not subject to splashing water (storms, water droplets), oil (oil droplets)
or other liquids
Area free of excessive salt
Area not subject to continuous vibration or excessive shocks
Area free of excessive electromagnetic noise (from welders, power machinery,
etc.)
Area free of radioactive materials, magnetic elds or vacuum
Altitude Up to 1000 m (3300 ft.) above sea level
Note On rare occasions, grease may ooze out from the gearhead. If there
is a concern over possible environmental damage resulting from the
leakage of grease, provide an oil tray or similar oil catching mechanism
in order not to cause a secondary damage. Grease leakage may lead to
problems in the customer's equipment or products.
 Installation method
Note Do not install the motor to the mounting hole diagonally or assemble
the motor forcibly. Doing so may cause damage to the motor.
zCombination type
Secure the motor with mounting screw set (supplied) through the four mounting
holes provided. Do not leave a gap between the motor and mounting plate.
MotorGearhead
(L2)
L1
Motor
Hexagonal
socket head
screw
Gearhead
Mounting plate
Spring
washer
Washer Supplied
Mounting screw set (supplied)
Model Gear ratio
Hexagonal socket head screw L2
[mm (in.)]
Tightening
torque
Screw
size Material L1 [mm (in.)]
2RK6
2, 3
M4
Stainless
steel
55 (2.17) 8 (0.31)
1.4 N·m
(12.3 lb-in)
5 to 25 50 (1.97) 7 (0.28)
30 to 120 55 (2.17) 8 (0.31)
150 to 360 60 (2.36) 8 (0.31)
3RK15
2, 3
M6
65 (2.56) 12 (0.47)
5.0 N·m
(44 lb-in)
5 to 25 60 (2.36) 12 (0.47)
30 to 120 65 (2.56) 12 (0.47)
150 to 360 70 (2.76) 12 (0.47)
4RK25
2, 3 65 (2.56) 9 (0.35)
5 to 25 60 (2.36) 9 (0.35)
30 to 120 65 (2.56) 9 (0.35)
150 to 360 70 (2.76) 9 (0.35)
5RK40
5RK60
2, 3
M8
85 (3.35) 16 (0.63)
12.0 N·m
(106 lb-in)
5 to 18 70 (2.76) 14 (0.55)
25 to 100 85 (3.35) 16 (0.63)
120 to 300 90 (3.54) 15 (0.59)
5RK90
3 85 (3.35) 16 (0.63)
5 to 15 70 (2.76) 14 (0.55)
18 to 36 85 (3.35) 16 (0.63)
50 to 180 95 (3.74) 14 (0.55)
Removing/Installing the gearhead
See the following steps to replace the gearhead or to change the outlet
position of the lead wires and the position of the terminal box.
Removing the gearhead from the motor
Remove the hexagonal socket head screws (2 pieces)
assembling the motor and gearhead and detach the
motor from the gearhead.
Hexagonal socket
head screw
Installing the gearhead to the motor
1. Keep the pilot sections of the
motor and gearhead in parallel,
and assemble the gearhead with
the motor while slowly rotating it
clockwise/counterclockwise.
At this time, note so that the pinion
of the motor output shaft does not
hit the side panel or gears of the
gearhead strongly.
2. Check no gaps remain between the
motor and gearhead, and tighten
them with hexagonal socket head
screws (2 pieces).
Pinion of
the motor
output shaft
Pilot section
Assemble the gearhead to the motor
in a condition where the motor output
shaft is in an upward direction.
Side panel
Gearhead model Screw size Tightening torque
2GVB
3GVB
4GVB
M2.6 0.4 N·m
(3.5 lb-in)
5GVB
5GVHB
5GVRB
M3 0.6 N·m
(5.3 lb-in)
Note
Do not forcibly assemble the motor and gearhead. Also, prevent
metal objects or foreign substances from entering in the gearhead.
The pinion of the motor output shaft or gear may be damaged,
resulting in noise or shorter service life.
Do not allow dust to attach to the pilot sections of the motor and
gearhead. Also, assemble the motor and gearhead carefully by not
pinching the O-ring at the motor pilot section. If the O-ring is crushed
or severed, grease may leak from the gearhead.
zRround shaft type
Secure the motor with hexagonal socket head screws (not supplied) through
the four mounting holes provided. Do not leave a gap between the motor and
mounting plate.
Motor
Mounting plate
Model Screw size Tightening torque
2RK M4 1.8 N·m (15.9 lb-in)
[1.4 N·m (12.3 lb-in)]
3RK M5 3.8 N·m (33 lb-in)
[3.0 N·m (26 lb-in)]
4RK
5RK M6 6.4 N·m (56 lb-in)
[5.0 N·m (44 lb-in)]
The brackets [ ] indicate the value for stainless steel.
zMotor with cooling fan
When installing a motor with cooling fan onto a device, leave 10 mm (0.39 in.)
or more behind the fan cover or open a ventilation hole so that the cooling
inlet on the back of the motor cover is not blocked.
zMounting the capacitor
Mount the capacitor securely by using M4 screws
(not provided).
Ø4.3 mm
(0.169 in.)
Note
Do not let the screw fastening torque exceed 1 N·m (8.8 lb-in) to
prevent damage to the mounting foot.
Mount capacitor at least 10 cm (3.94 in.) away from the motor. If it
is located closer, the life of the capacitor will be shortened.
 Installing a load
The gearhead shaft is provided with a key slot
for connecting the transmission parts. When
connecting the transmission parts, ensure
that the shaft and parts have a clearance t,
and always x the parallel key to the output
shaft with a screw to prevent the parts from
rattling or spinning.
Screw
Parallel key
Gearhead
output shaft
Note Do not apply excessive force onto the output shaft of the gearhead
using a hammer or other tools. Doing so may cause damage to the
output shaft or bearings.

3
zWhen using the output shaft end tapped hole of a gearhead
Use a tapped hole provided at the end of the output shaft as an auxiliary means
for preventing the transfer mechanism from disengaging.
(2GVB, 3GVB type have no output shaft end tapped hole.)
Gearhead model Output shaft end
tapped hole
Fixed screw
Screw
Spacer
Transmission
parts
4GVBM5, Eective depth
10 mm (0.39 in.)
5GVB
5GVHB
5GVRB
M6, Eective depth
12 mm (0.47 in.)
Connection
Insulate all the wire connections, such as the connection between the motor
and the capacitor connection.
zConnecting Protective Earth Terminal
Be sure to ground the motor using the Protective Earth Terminal on the motor.
Use a crimp terminal described below for grounding.
Applicable crimp terminal:
Insulated round crimp terminal
Terminal screw size: M4
Tightening torque:
1.0 to 1.3 N·m (8.8 to 11.5 lb-in)
Applicable minimum lead wire size:
AWG18 (0.75mm2) or thicker
Ø4.1 (0.16) or more
[ Unit: mm (in.) ]
4.8 (0.19) or less
9.5 (0.37)
or less
Note Be sure to use the screw for grounding attached on the product.
 Wiring diagram
The rotation direction of the combination type varies depending on the gear
ratio of the gearhead.
Check the motor model name and the gear ratio before connecting.
The connection diagram is an example of the lead wire type.
When connecting as the connection diagram the motor rotates in
the direction as shown below.
Gear ratio and the round shaft type : CW (clockwise)
Gear ratio : CCW (counter clockwise)
Motor
model Gear ratio
2RK6
3RK15
4RK25
2 3 5 6 7.5 9 12.5 15 18 25 30 36
50 60 75 90 100 120 150 180 250 300 360 −
5RK40
5RK60
2 3 5 6 7.5 9 12.5 15 18 25 30 36
50 60 75 90 100 120 150 180 250 300 − −
5RK90
−3 5 6 7.5 9 12.5 15 18 25 30 36
50 60 75 90 100 120 150 180 −−−−
CW
L
N
Grounding
Power
supply
White (Z2)
Red (U2)
Black (U1)
R0C0
SW CCW
CW
R0C0
Switching the SW will rotate the motor in the opposite direction.
A code in the parentheses ( ) represents a terminal code of the terminal box type.
zContact protection
In order to protect contacts, connect a CR circuit for surge suppression ( )
as shown in the gure.
R0 = 5 to 200 
C0 = 0.1 to 0.2 µF 250 VAC
It is provided as an accessory (sold separately).
Model: EPCR1201-2
 Capacitor connection
When crimp terminals are used, use the FASTON
terminals 187 Series (TE Connectivity).
Use the supplied capacitor cap to insulate the
capacitor terminal connection.
Capacitor
187 series
Capacitor cap
Note For lead wire connection, use one lead wire for each individual
terminal.
 Connection method to a terminal block
Remove the terminal box cover for the terminal box type, and connect a cable.
Cables for connection are available as accessories (sold separately).
If the O-ring that has set in the matching surface of the terminal box cover
falls o, install it securely in the groove portion of the terminal box cover.
After connecting the cable, securely tighten with the tightening torque in the
table below.
Note
To make shielding function fully eective, use a cable of an
appropriate diameter and observe the specied tightening torque
of screws.
Secure the cable drawn from the motor terminal box so that it does
not receive stress.
Terminal box cover mounting
screw (M4-4 pieces)
Terminal box cover
Mounting screw
for terminal (M4)
Terminal box
Nipple
Tightening
nut
Protective Earth
Terminal (M4)
Cable gland
Terminal codes : Z2 U2 U1
Terminal block
Tightening torque [Unit: N·m (lb-in)]
Terminal box cover mounting screw 1.0 to 1.5 (8.8 to 13.2)
Mounting screw for terminal 1.0 to 1.2 (8.8 to 10.6)
Tightening nut 2.0 to 2.5 (17.7 to 22)
Nipple 2.0 to 2.5 (17.7 to 22)
Protective Earth Terminal 1.0 to 1.5 (8.8 to 13.2)
When connecting the cable on the terminal block, use the following cable
and crimp terminal.
Applicable crimp terminal:
Insulated round crimp terminal
Applicable cable diameter:
Ø7 to Ø13 mm (Ø0.28 to Ø0.51 in.)
Applicable lead wire:
AWG18 (0.75 mm2) or thicker
[Unit: mm (in.)]
Ø4.3 (0.17) or more
18 (0.71) or less
8 (0.31)
or less
zChanging the cable outlet position
The cable outlet position can be changed to the left or right 90-degree
direction, or the 180-degree direction.
When changing the direction of the cable outlet position, loosen the terminal
box mounting screws, and rotate the terminal box to change the mounting
direction.
Terminal box mounting screw
(M4-4 pieces.)
Tightening torque:
1.0 to 1.5 N·m (8.8 to 13.2 lb-in)
Terminal box
Gasket
Motor case
Note
Be sure to use the gasket which has been put in the product at the
time of shipment.
Assemble not to enter any foreign object between the terminal
box and motor case.

4
Unauthorized reproduction or copying of all or part of this manual is
prohibited.
Oriental 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.
Characteristics, specications and dimensions are subject to change without
notice.
While 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 the nearest oce.
 is a registered trademark or trademark of Oriental Motor Co.,
Ltd., in Japan and other countries.
© Copyright ORIENTAL MOTOR CO., LTD. 2014
Published in December 2017
Technical Support Tel:[phone]
8:30 A.M. to 5:00 P.M., P.S.T. (M-F)
7:30 A.M. to 5:00 P.M., C.S.T. (M-F)
www.orientalmotor.com
Schiessstraße 44, 40549 Düsseldorf, Germany
Technical Support Tel:[phone]
www.orientalmotor.de
Tel:[phone]
www.oriental-motor.co.uk
Tel:[phone]
www.orientalmotor.fr
Tel:[phone]
www.orientalmotor.it
Tel:[phone]
www.orientalmotor.com.br
• Please contact your nearest Oriental Motor oce for further information.
4-8-1Higashiueno,Taito-ku,Tokyo 110-8536
Japan
Tel:[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]
www.orientalmotor.co.in
Hong Kong Branch
Tel:[phone]
Operation
The motor rotates when the power supply is turned on.
For protection against electric shock, do not turn on the power supply until the
wiring is complete.
Note Make sure that the motor case temperature does not exceed
90 °C (194 °F) when operating the motor. Operation exceeding case
temperature 90 °C (194 °F) may signicantly deteriorate the coils and
ball bearings of the motor and shorten the motor's life span. Motor
case temperature can be measured by xing a thermometer on
the motor surface. It can also be measured using thermo tape or a
thermocouple.
Time rating
Reversible motors have a 30 minutes rating. “30 min” is indicated on the nameplate.
Overheat protection for locked condition
This motor is equipped with one of the two features listed below to prevent the
motor from burning out as a result of abnormal heating which may be caused
by misapplication.
 Thermally protected motors
"TP" is marked on the motor nameplate. This motor contains a built-in
automatic return type thermal protector in the motor windings. If the motor
internal temperature exceeds the specied value, the thermal protector is
activated and the motor is stopped.
Always turn the power o before performing inspections.
Operating temperature of thermal protector:
Open (motor standstill) ............ 130±5 °C (266±9 °F)
Close (resuming operation) .... 85±20 °C (185±36 °F)
 Impedance protection
"ZP" is stamped on the motor nameplate. The motor has higher coil impedance.
When the motor goes into locked rotor condition due to a malfunction, coil
impedance rises, suppressing input power to the motor and protecting the
motor coil from burnout.
Troubleshooting
When the motor cannot be operated correctly, refer to the contents provided in this
section and take appropriate action. If the problem persists, contact your nearest
oce.
Phenomena Check items
Motor does not rotate.
Motor sometimes rotates
and stops.
Check the power supply voltage.
Connect the power supply and the motor correctly.
Connect the supplied capacitor correctly.
If terminal blocks or crimp terminals are used,
check them for poor connection.
Keep the load at or below the allowable value.
The motor rotates in the
direction opposite to the
specied direction.
Connect the supplied capacitor correctly.
The connection varies depending on the gear
ratio of the gearhead.
The rotation direction is as viewed from the
output shaft end. Check the reference direction.
Motor temperature
abnormally high
[Motor case temperature
exceeds 90 °C (194 °F) ]
Check the power supply voltage.
With a single-phase motor, connect the supplied
capacitor correctly.
Review the ventilation condition.
Noisy operation
Assemble the motor and gearhead correctly.
Assemble a gearhead of the same pinion type as
the motor.
Regulations and standards
 UL Standards, CSA Standards, CCC System
This product is recognized by UL under the UL and CSA Standards, and also
certied by CQC under the China Compulsory Certication (CCC) system.
The motor model name represents the model that conforms to the standards.
Applicable standards
Applicable standards Certication Body / File No.
UL 1004-1, UL 1004-2, UL 1004-3 UL /
UL File No.E64197, E64199
CSA C22.2 No.100, CSA C22.2 No.77
GB/T 12350 CQC
Thermal Class: 130 (B)
zStandards for accessories
Capacitor: UL File No.E83671 (CYWT2),
VDE License No.112847 (capacitors with a rated voltage of 250 VAC),
114747 (capacitors with a rated voltage of 450 VAC)
Capacitor cap: UL File No.E56078 (YDTU2)
 CE Marking
This product is axed the CE Marking under the Low Voltage Directive.
zLow Voltage Directive
 Applicable standards
EN 60034-1, EN 60034-5, EN 60664-1
Momentary excess torque based on EN 60034-1
Model Momentary excess torque Momentary excess torque represents
a maximum torque that can maintain
the operation for 15 seconds without
stalling or abrupt speed change even
if the torque is increased gently while
operating at rated voltage and rated
frequency.
2RK6
3RK15 120% of the rated torque
4RK25 150% of the rated torque
5RK40
5RK60 160% of the rated torque
5RK90 130% of the rated torque
 Installation conditions (For EN standard)
Overvoltage categoryⅡ, Pollution degree 2, ClassⅠequipment
When the machinery to which the motor is mounted requires overvoltage
categoryⅢspecications, install the motor in a cabinet that connect to power
supply via an isolation transformer.
 Motor temperature rise tests
Temperature rise tests required by the above standards are performed in a state
that has been attached a heat radiation plate instead of a gearhead.
The size and material for the heat radiation plates are as follows.
[Size]
2RK6: 115×115 mm (4.53×4.53 in.) 3RK15: 125×125 mm (4.92×4.92 in.)
4RK25: 135×135 mm (5.31×5.31 in.) 5RK40: 165×165 mm (6.50×6.50 in.)
5RK60, 5RK90: 200×200 mm (7.87×7.87 in.)
[Thickness] 5 mm (0.20 in.)
[Material] Aluminum alloy
 RoHS Directive
The products do not contain the substances exceeding the restriction values of
RoHS Directive (2011/65/EU).