BEARING HEATER<INVERTER DRIVEN INDUCTION HEATER>INSTRUCTION MANUALIHE Series
Single Phase: IHE0110A, IHE0120G
Three Phase: IHE0320G, IHE0340G, IHE0620G, IHE0640G
IHE1120G, IHE1140G, IHE2320G, IHE2340G

Manufacturer: Etoh Inc.
2-2-7 Maeda YahataHigashi-ku
Kitakyushu City, Fukuoka, Japan
TEL:+81-93-681-5338 FAX:+81-93-671-3221
Manual No. TO-IHE-0608-E
Page 1 of 41

Inverter Driven Bearing Heater IHE Series Instruction Manual Contents
1. Preface ..........................................................................................................................................page 3
2. General Precautions ...................................................................................................................page 3
3. Safety Information .....................................................................................................................page 3
4. Transportation Precautions .....................................................................................................page 4
5. Warning Label .............................................................................................................................page 4
6. Introduction ................................................................................................................................ page 5
6.1 Features and Functions ................................................................................................... page 5
6.2 Full View and Part Description ...................................................................................... page 7
7. Handling IHE series ................................................................................................................ page 14
7.1 Confirmations Upon Delivery ....................................................................................... page 14
7.2 Usage and Installation .................................................................................................. page 16
7.2.1 Connecting the Power Supply for IHE0320G, IHE0340G
IHE0620G, and IHE0640G .................... page 17
7.2.2 Connecting the Power Supply for IHE1120G, IHE1140G
IHE2320G, and IHE2340G .................... page 20
7.3 Accessory Storage ........................................................................................................... page 25
7.3.1 Accessory Storage for IHE0110A and IHE0120G ........................................... page 25
7.3.2 Accessory Storage for IHE0320G, IHE0340G,
IHE0620G and IHE0640G .............................................. page 26
7.3.3 Accessory Storage for IHE1120G, IHE1140G,
IHE2320G and IHE2340G ............................................... page 27
7.4The method of I-type core removal device .................................................................... page 28
8. Heating Procedures ................................................................................................................. page 30
8.1 Control Panel Operation .............................................................................................. page 30
8.1.1 Prepare for heating ............................................................................................. page 30
8.1.2 Heating Procedures ............................................................................................ page 30
8.1.3 Flow Chart ........................................................................................................... page 31
8.2 Sequence Operation ( External terminal operation) .............................................. page 32
9. Maintenance and Spare Parts .............................................................................................. page 32
9.1 Preventative Maintenance .......................................................................................... page 32
9.2 Spare Parts .................................................................................................................... page 32
9.3 Cleaning Instruction .................................................................................................... page 32
10. Troubleshooting ..................................................................................................................... page 33
11. Specifications ......................................................................................................................... page 35
Standard and Optional Accessories .................................................................................... page 36
12. Limited Warranty .................................................................................................................. page 37
Appendix ........................................................................................................................................ page 38
Appendix 1: Inner Diameter Expansion Temperatures.................................................. page 38
Appendix 2: Safety Instruction ........................................................................................... page 39
Appendix 2.1: Warning Symbols .................................................................................. page 39
Appendix 2.2: Warnings................................................................................................. page 39
Appendix 2.3: Caution.................................................................................................... page 40

Page 2 of 41

1. PREFACE
Thank you for purchasing the Inverter Driven Bearing Heater (IHE series). This product isdesigned to heat a ring, usually a bearing, for the shrink-fitting process of the ring.
This manual is designed to provide correct and suitable application information.

Read this manual before attempting to install, operate, maintain or inspect IHE
series heaters. Keep this manual in a safe, convenient location for future reference.
Understand all precautions and safety information before attempting use.

2. GENERAL PRECAUTIONS(A) Any illustration, photograph or examples used in this manual are provided as
examples only and may not apply to all products to which this manual is applicable.
(B) The products and specifications described in this manual can be changed without
notice.
(C) If the equipment is used in a manner not specified in this manual, the protection
provided by the equipment may be compromised.
(D) This product is designed to metal rings such as bearing and gear etc. only.
(E) When ordering a new copy of the manual due to damage or loss, please provide themanual number shown on the front page.

3. SAFETY INFORMATION(A) Do not heat bearings above 120℃ (248°F).
(B) Wear heavy gloves to prevent burns.
(C) Keep magnetic materials such as watches, computers, hearing aids etc. away from theunit.
(D) People with pacemakers shall not be in the vicinity of the heater(s).
(E) Do not touch the main core or I-type core during heating.
(F) Check supply voltage regularly.
(G) To provide continued protection against electric shock, connect to properly grounded
outlets only.
(H) Read Safety Instruction in Appendix 2 before using.
(I) Don’t attempt to modify or alter the bearing heater.
(J) Follow the instruction manual at all times.
(K) Turn off the main power when not in use.
(L) Turn off the main power and unplug the machine when a lightning strike may occur.
(M) In initial state of heating, the inverter output frequency changed from high to low tofind the optimal frequency most suitable for heating efficiency for the load.
(Ref: 6.1 (A) Constant Apparent Power Control)
Temperature detection is still operated after set frequency. The heating temperature may
over the target while the frequency is adjusted depending on the condition.
The products which ship now, the frequency decrease is set in about 1 second at
shipment.
Regarding the products which ship from May 2009 to September 2015, it takes at
maximum about 8 seconds.
Page 3 of 41

4. TRANSPORTATION PRECAUTIONS
The product is packed to minimize the impact of shock, vibration, and humidity on the product.
Especially aware the items as below.
 Excessive shocking and vibration
 Throwing and dropping in the freight handling Turning the package upside down
 To wet the cardboard box

5. WARNING LABEL
There is a warning label on the unit. Always follow the warnings given on this label.

！

危険W A R N IN G
A V E R T IS S E M E N T

注 意 事 項 W a r n in g A v e r t is s e m e n t :・据 付 ・加 熱 の 前 に は 必 ず , 取 扱 説 明 書 を 読 ん で 、 そ の 指 示に 従 っ て くだ さ い。
M a y C a u s e in ju r y o r e le c t r ic a l s h o c k . P le a s e fo llo w t h e
in s t r u c t io n s in t h e m a n u a l b e fo r e in s t a lla t io n o r o p e r a t io n .
P e u t e n t r a n e r d e s b le s s u r e s o u d e s c h o c s é île c t r iq u e s . V e u ille z
s u iv r e le s in s t r u c t io n s d u m a n u e l a v a n t l'in s ta lla tio n o u
l'u t ilis a t io n .

・感 電 の お そ れ が あ り ま す 。 確 実 に 接 地 を 行 っ て くだ さ い 。
C o n n e c t t o p r o p e r ly g r o u n d e d o u t le t o n ly o r u s e p r o p e r
g r o u n d in g t e c h n iq u e s ,t o p r o v id e c o n t in u e d p r o t e c t io n a g a in s t
e le c t r ic a l s h o c k .
B r a n c h e z u n i q u e m e n t s u r u n e p r i s e c o r r e c t e m e n t m i s e à laterre ou u tilisez les tech n iq u es d e m ise à la terre q u i
c o n v i e n n e n t , a f i n d 'o f f r i r u n e p r o t e c t i o n c o n t i n u e c o n t r e l e s
c h o c s é le c t r iq u e s

・機 器 と 電 源 の 電 圧 が あ っ て い る こ と を 確 認 し て くだ さ い 。
C h e c k v o lt a g e s o f t h e p o w e r s u p p ly a n d t h e p r o d u c t .
V r ifie z le s t e n s io n s d e lé 'a lim e n t a t io n e t d u p r o d u it.
・ペ ー ス メ ー カ を 使 用 し て い る 人 は 、 通 電 中 近 づ か な い で くだ さい。
P e r s o n s w it h H e a r t P a c e m a k e r s h a ll n o t b e in t h e v ic in it y o f
t h e p r o d u c t d u r in g h e a t in g .
L e s p e r s o n n e s p o r t e u s e s d 'u n p a c e m a k e r n e d o iv e n t p a s s e t e n ir
d a n s le v o is in a g e d u p r o d u it p e n d a n t le c h a u ffa g e

・時 計 ・鉄 片 等 の 磁 性 体 は 近 づ け な い で くだ さ い 。
D o n o t p u t w a t c h e s o r a n y m a g n e t ic m a t e r ia ls o r s h e e t o f
m e ta l n e a r th e p ro d u c t.
N e p o se z n i m o n tre n i m a té r ia u m a g n é tiq u e o u fe u illem é t a lliq u e à p r o x im it é d u p r o d u it

Page 4 of 41

6. INTRODUCTION
The IHE series bearing heater is an induction heater designed for the shrink fit process byusing the thermal expansion of heated cylindrical parts (bearing etc.) due to the temperaturerise caused by the electric resistance Joule heat generated from electro-magnetically induced
current from the built-in induction coil.
Since the inverter is built-in, regardless of I-type core and the bearing load conditions, fixed
apparent electric power is supplied to an excitation coil, effectively shortening the heating time.

6.1 Features and Functions
The IHE series has the advanced features and functions described below, in addition toconventional induction bearing heaters.
(A) Constant Apparent Power Control
Shorter heating time compared with a conventional type induction-bearing heater isachieved by constant apparent power control. The built-in inverter supplies its maximum
fixed apparent power to excitation coils with variable frequencies, regardless of I-type coreand various load conditions (bearing dimensions, weight, electrical characteristics ofmaterial used in bearings).
As soon as heating is started, the frequency is adjusted and fixed.
(B) Simple Operation
The IHE series is user-friendly with operational panel ensuring ease and simplicity ofoperation. Using the LED panel along with its simple-to-use digital controls, increases
productivity.
(C) Two Operational Modes
The IHE series has two operational modes: time and temperature. A simple one-touch
operation changes the control modes.
In the temperature control mode, it can changeover Celsius or Fahrenheit.
After the temperature reaches the set temperature, the temperature is kept (controlled) at
the set temperature.
(D) Automatic Demagnetization and Higher Demagnetization Level
The demagnetization process is performed automatically on pressing the stop button after
the set temperature is reached(Temperature control mode) or when the timer countreaches zero (Timer control mode). The bearing can be demagnetized manually if necessary.
The demagnetization level is no more than 3Gauss (1000microT) at any point on the
bearing surface.
(E) I-type Core Removal Device (Built into Slide Type Bearing Installation Table)(Except IHE0110A, IHE0120G)
For middle and large types, I-type core removal device is equipped for easy installation of
I-type core and bearing.

Page 5 of 41

(F) Safe and Reliable
The IHE has the protect function by the circuit breaker and built-in inverter, it has also theprotect function against coil over temperature and temperature sensor abnormal.
(G) Finishing Acoustic Signal
Built-in buzzer emits 75 +-10dB (reference sound pressure 20uPa) electronic beep sounds
when the desired temperature is reached (Temperature Control mode) and the time iscounted down to zero (Timer Control mode).
(H) Heating Controllability
The IHE series designed to have Power Reduction Function by setting the reduction rate
100-50% by 10% steps.
（I）Sequence Operation
In addition to Control Panel Operation, Sequence Operation is also available.

Page 6 of 41

6.2 Full View and Part Description
IHE0110A, IHE0120G
②

①
②
③
④
⑤
⑥

Circuit Breaker
Operation Panel
Temperature Sensor Socket
Main Core
Foldable Core CoverI-type Core

③
④

⑥

①

⑤

Fig 6-1

Page 7 of 41

175mm

IHE0320G, IHE0340G

①
②
③
④
⑥
⑦
⑧
④

⑥

Circuit Breaker
Operation Panel
Temperature Sensor Socket
Main Core
I-type Core
I-type Core Removal Device
Storage Space for I-type Cores
and Accessories

⑦

③

①

⑧

②

Fig 6-2

IHE0620G, IHE0640G

①
②
③
④
⑥
⑦
⑧
④

⑥

Circuit Breaker
Operation Panel
Temperature Sensor Socket
Main Core
I-type Core
I-type Core Removal Device
Storage Space for I-type Cores
and Accessories

⑦

③

⑧

①

②

Fig 6-3
Page 8 of 41

IHE1120G, IHE1140G
Circuit Breaker
Operation Panel
Temperature Sensor Socket
Main Core
I-type Core
I-type Core Removal Device
Storage Box for Accessories
Storage Space for I-type Cores

①
②
③
④
⑥
⑦
⑨
⑩
④

⑥

⑦

③

①

②

⑩

⑨

Fig 6-4

IHE2320G, IHE2340G④⑥

Circuit Breaker
Operation Panel
Temperature Sensor Socket
Main Core
I-type Core
I-type Core Removal Device
Storage Box for Accessories
Storage Space for I-type Cores

①
②
③
④
⑥
⑦
⑨
⑩

⑦

③

①

②

⑨

⑩

Fig 6-5
Page 9 of 41

(1) Circuit Breaker
The circuit breaker protects the main circuit and all electrical components downstream.
(2) Operation Panel
The 7-Segment LED displays digital figures such as setting or actual temperature in
Temperature Control Mode and setting time or the time counted down in Timer Mode.
On the right-hand of the 7-segment LED display, there are five LEDs indicating the state.

ms

The meanings of the stage LEDs are described as below.
①
②
③
④
⑤

ON: Lighting during heating
OFF: Lighting after heating
Thermometer Icon: Lighting in Temperature control mode
Timer Icon: Lighting in Timer control mode
Magnet Icon: Lighting during demagnetization (Automatic/Manual)

The meanings of the function buttons are described as below.

START

STOP

Heating Start

Heating Stop (Reset)

Setting value increase

Setting value decrease

Page 10 of 41

Temperature control mode selection, setting temperature,
current temperature, and Rise ratio (double click during
heating) is displayed.

Timer control mode selection, setting time is displayed.

Manual demagnetization

STOP

Power reduction mode (Default setting:100%)

STOP

then
Setting the reduction rate 100-50% by 10% steps＊Once the circuit breaker is turned down, the power reduction setting is returned
default setting(100%)＊It is not necessary for the normal heating to set the power reduction mode.
Depending on the work piece, the quick heating may cause the damage to the workpiece.
By setting the power reduction, the power can be adjusted by 10% steps, from 100% to
50%.

STOP

Temperature display changeover
Default setting (Factory shipment): Celsius
It is effective only when the machine is in the STOP state.

＊Don’t change the temperature display during operation as it may cause any
malfunction.
＊Confirm the temperature displayed (Celsius or Fahrenheit) is the one you intend touse during operation.

Page 11 of 41

(3) Temperature Sensor Socket
Connect the temperature sensor to the sensor socket.
Be aware of the polarity (+ and – of the sensor)
 Temperature Sensor
The temperature sensor is equipped with a permanent magnet to secure the sensor to
the inner ring during heating. Make sure the detection edge of the sensor is notdamaged. Mount the sensor so that the detection edge securely contacts the surface ofthe ring being heated. Don’t change or alter the extension lead wire of the thermocouple,or it may not measure correctly.
Confirm on the operation panel that the temperature is increasing during heating.
The upper limit of working temperature of the sensor is 250℃（482°F）

Compensating conductor(Extension lead wire)

Detection end(Contact plate)

MagnetTemperature Sensor(4) Main Core
Main magnetic flux flows through the main core. Make sure the polished faces arealways greased. This will protect the ends of the main core against rust, scaring andscratches. The lack of grease may cause the abnormal vibration and/or loud noise.
(5) Foldable Core Cover (IHE0110A and IHE0120G only)
Fold up the foldable core cover for protecting the polished faces of the main core whenthe IHE series isn’t used. The cover should be kept upright to prevent dust or damage tothe polished faces of the main core.
(6) I-type CoreFor heating bearing, install an I-type core through the inner bore of the bearing. (SeeTable 6-1) Choose the largest I-type core for heating. The larger cross-section of theI-type core that is chosen, the shorter the heating time. Meet the polished faces of theI-type core and main core both at the top and bottom. Make sure the polished faces arealways greased. During heating, the I-type core is attracted to the main core bymagnetism, be careful that your fingers do not become caught between the I-type core
and the main core.
Page 12 of 41

Table 6-1 Standard and Optional I-type Cores
Type of body

IHE0110A
IHE0120G
IHE0320G
IHE0340G
IHE0620G
IHE0640G
IHE1120G
IHE1140G
IHE2320G
IHE2340G

Type of I-type coreDimensions
D×W×L (ｍｍ)N-CI-1808（OP）
N-CI-1815
N-CI-1825
N-CI-1835
N-CI-2515（OP）
N-CI-2525
N-CI-2535
N-CI-2545
N-CI-3715（OP）
N-CI-3725
N-CI-3735
N-CI-3755
N-CI-5225（OP）
N-CI-5235
N-CI-5255
N-CI-5270
N-CI-6725（OP）
N-CI-6735
N-CI-6755
N-CI-6785

8×8×185
15×15×185
25×25×185
35×35×185
15×15×250
25×25×250
35×35×250
45×45×250
15×15×370
25×25×370
35×35×370
55×55×370
25×25×520
35×35×520
55×55×520
70×70×520
25×25×670
35×35×670
55×55×670
85×85×670

Bore diameter of bearing (mm)

12～20
20～35
35～50
Above 50
20～35
35～50
50～70
Above 70
20～35
35～50
50～80
Above 80
35～50
50～80
80～100Above 100
35～50
50～80
80～130Above 130

*OP・・・Option(7)I-type Core Removal Device (Built into Slide Type Bearing Installation Table)(standard for IHE0320G , IHE0340G , IHE0620G , IHE0640G , IHE1120G , IHE1140G ,IHE2320G , and IHE2340G)
This device helps remove the I-type core by levering it up along the polished face of the maincore for easier removal.
(8) Storage Space for I-type cores and Accessories (IHE0320G , IHE0340G , IHE0620G ,IHE0640G)
I-type core, I-type core guide, temperature sensor are found in the storage space.
(9) Storage Box for Accessories (IHE1120G , IHE1140G , IHE2320G , IHE2340G)
I-type core guide, temperature sensor, I-type core lift-up tool are found in the storage box.
(10) Storage Space for I-type cores (IHE1120G , IHE1140G , IHE2320G , IHE2340G)
I-type core are found in the storage space.

Page 13 of 41

7. HANDLING IHE series
7.1 Confirmation Upon Delivery
Check the following items in Table 7-1 when bearing heater IHE series is delivered.
Table 7-1 Checks
Items
Are Standard accessories
and optional accessories
included?
Has the correct model ofthe IHE been delivered?
Damage?

MethodAccording to Table 7-2, check the parts on hand.
Check the model number in the rating name seal on the IHE.
Refer to Fig 7-1A, Fig 7-1B, Fig 7-1C
Inspect the appearance of the entire unit for any damage due totransportation.

Table 7-2 Standard and Optional Accessories
IHE0320G
Type
IHE0110A IHE0120G
IHE0340G
N-CI-1808 N-CI-1808 N-CI-2515
(OP)
(OP)
(OP)
I-type
N-CI-1815 N-CI-1815 N-CI-2525
Core
N-CI-1825 N-CI-1825 N-CI-2535
N-CI-1835 N-CI-1835 N-CI-2545
N-CS-2515(OP)
I-type Core
Guide
N-CS-2525
N-CS-2535
I-type Core
lift –up tool
Accessory
N-CA-0001 N-CA-0001
Storage Bag
Temperature
N-CTC-300 N-CTC-300 N-CTC-500
Sensor* (OP)…Option

Page 14 of 41

IHE0620G
IHE0640G
N-CI-3715(OP)
N-CI-3725
N-CI-3735
N-CI-3755
N-CS-3715(OP)
N-CS-3725
N-CS-3735

IHE1120G
IHE1140G
N-CI-5225(OP)
N-CI-5235
N-CI-5255
N-CI-5270
N-CS-5225(OP)
N-CS-5235
N-CS-5255

IHE2320G
IHE2340G
N-CI-6725(OP)
N-CI-6735
N-CI-6755
N-CI-6785
N-CS-6725(OP)
N-CS-6735
N-CS-6755-

N-CL-578

N-CL-578---

N-CTC-500 N-CTC-1000 N-CTC-1000

Bearing Heater

Etoh Inc. Made in JapanFig 7-1A IHE0110A Rating Name Seal

Bearing Heater

Etoh Inc. Made in JapanFig 7-1B IHE0120G Rating Name Seal

Bearing Heater

Etoh Inc. Made in JapanFig 7-1C IHE0320G,IHE0340G,IHE0620G,IHE0640G,IHE1120G,
IHE1140G IHE2320G and IHE2340G Rating Name Seal
Page 15 of 41

IHE

01 10A
Inverter Driven Bearing Heater
OUTPUT 01:1kVA
03:3.3kVA
06:6.6kVA
11:11.8kVA
23:23kVA
Voltage 10A:100-120V 50/60Hz (IHE0110A)
20G:200-240V 50/60Hz (IHE0120G,IHE0320G):200-230V 50/60Hz (IHE0620G,IHE1120G):200-220V 50Hz (IHE2320G):200-230V 60Hz (IHE2320G)
40G:380-480V 50/60Hz(IHE0340G,IHE0640G,IHE1140G)
380-440V 50Hz (IHE2340G)
380-480V 60Hz (IHE2340G)

IHE Model Number

7.2 Usage and Installation(A) Power Supply
Make sure that the power voltage meets the required specifications.
(B) Installation Site
Install the machine on a flat and stable surface.
Always lock the safety stoppers on the wheels except moving of the machine. (All types
except IHE0110A and IHE0120G)
Do not place the machine in areas subject to high temperature, high humidity, splash, or
bad ventilation. Also, avoid using in places subject to dust, metal shavings, or vibration.
Install the machine on a flat level surface.
Do not place the flammable material in the vicinity of this products.
Do not place this product in the place blocking up the vent.
(C) Inside the Machine
Do not open the machine for inspection or repair. It may cause damage or injury.
(D) Unplug the Machine When Not in Use.
WARNING(i) Do not install the IHE series in an area that makes it difficult to operate theappliance inlet in a safe manner.
(ii) Do not use the IHE series in any manner other than its intended purpose as specified
by the manufacturer. To do so could impair the safety features and user protection
provided by the equipment.

Page 16 of 41

7.2.1 Connecting the Power Supply for IHE0320G , IHE0340G ,IHE0620G , and IHE0640G
Open the field wiring compartment cover①Unscrew the two upper
hexagonal bolts with ahexagonal wrench.

The rear view ofbearing heater

The front view ofbearing heater②Loosen the two lower
hexagonal bolts with ahexagonal wrench.
Fig 7-1

Page 17 of 41

③Open the field wiring
compartment cover in themanner shown.

Fig 7-2④Penetrate the power supply cable with the strain relief listed inTable 7-3 through the conduit.
IHE0320G,IHE0620G：Conduit Diameter1/2NPT(22.2mm)
IHE0340G,IHE0640G：Conduit Diameter 1/2NPT (22.2mm)⑤Fix the strain relief onto the metal
wall with the locknut.
Locknut*refer Table 7-3

Power Supply Cable*refer Table 7-3
Metal wall of
Bearing HeaterFig 7-3

Strain Relief*refer Table 7-3

Page 18 of 41

⑥Connect the terminals of the power supply cable to the terminal block.
Terminal Blocks
IHE0320G：TXM10 04（Kasuga Electric）・・・Mounting Screw M3.5（Torque1.0～1.3N・m）
IHE0620G：TXM20 04（Kasuga Electric）・・・Mounting Screw M4（Torque1.4～1.8N・m）
IHE0340G：TXM7 04（Kasuga Electric）・・・Mounting Screw M3（Torque0.6～0.9N・m）
IHE0640G：TXM7 04（Kasuga Electric）・・・Mounting Screw M3（Torque0.6～0.9N・m）

R
S
T

Fig 7-4

Fig 7-5⑦Shut the cover and tighten the four
hexagonal bolts with a hexagonal wrench .

Page 19 of 41

7.2.2 Connecting the Power Supply for IHE1120G ,IHE1140G ,IHE2320G and IHE2340G
Open the field wiring compartment cover

Rear View of
Bearing Heater

Closeup①Loosen the two hexagonal bolts witha hexagonal wrench , and open the fieldwiring compartment cover over the
hinges.
HingesFig 7-6

Page 20 of 41

Fig 7-7②Penetrate the cable with the strain relief listed
in the Table 7-3 through the conduit.
IHE1120G,IHE1140G,IHE2340G
Conduit diameter 1/2 NPT（22.2mm）
IHE2320G：Conduit diameter 1 NPT（34.5mm）③Fix the strain relief onto the metal wall with the locknut
Locknut*refer Table 7-3

Power Supply Cable*refer Table 7-3
Metal wall of Bearing
HeaterFig 7-8

Strain Relief*refer Table 7-3

Page 21 of 41

ＲＳＴ④Connect the terminals of the power supply cable to the terminal block .
Terminal Blocks
IHE1120G：TXM50 04（Kasuga Electric ）・・・Mounting screw M 5（Torque2.2～2.8N・m）
IHE2320G：UKU35H0-4CU（Yoshida Electric ）・・・Mounting screw M 5（Torque2.0～3.0N・m）
IHE1140G：TXM10 04（Kasuga Electric ）・・・Mounting screw M 3.5（Torque1.0～1.3N・ｍ）
IHE2340G：TXM20 04（Kasuga Electric ）・・・Mounting screw M 4（Torque1.4～1.8N・ｍ）
Fig 7-9⑤Close the cover and tighten thetwo hexagonal bolts with ahexagonal wrench.

Fig 7-10

Page 22 of 41

Table 7-3 Recommended cables and parts for replacement
IHE0320G
Parts
Power Supply Cable

Plug Cap
Strain Relief
Locknut

Type
RO-FLEX 7700T AWG16*4 3m
PartNo.7700 0015004
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1520P
3 pole 4 wiring ground3phase 250V,20A, NEMA L15-20
Max-Loc 1/2NPT Part No.5528
Straight MalePart Number: 130098-0069
Part No.5601
1/2 NPT
Part No.130099-0143

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.375-0.437 inch
(9.5-11 mm) diameter－

IHE0620G
Parts
Power Supply
Cable

Plug Cap
Strain Relief
Locknut

Type
RO-FLEX 7700T AWG16*4 3m
PartNo.7700 0015004
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1520P
3 pole 4 wiring ground3phase 250V,20A, NEMA L15-20
Max-Loc 1/2NPT Part No.5528
Straight MalePart Number: 130098-0069
Part No.5601
1/2 NPT
Part No.130099-0143

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.375-0.437 inch
(9.5-11mm) diameter－

IHE1120G
Parts
Power Supply
Cable

Plug Cap
Strain Relief
Locknut

Type
RO-FLEX 7700T AWG14*4 5m
PartNo.7700 0025004
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1520P
3 pole 4 wiring ground3phase 250V,20A, NEMA L15-20
Max-Loc 1/2NPT PartNo.5534
Straight MalePart No.130097-0327
Part No.5601
1/2 NPT
Part No.130099-0143

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.562-0.625 inch
(14.3-15.9mm)diameter－

IHE2320G
Parts
Power Supply
Cable

Plug Cap
Strain Relief
Locknut

Type
RO-FLEX 7700T AWG8*4 5m
PartNo.7700 0100004
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1530P
3 pole 4 wiring ground3phase 250V,30A, NEMA L15-30
Max-Loc 1 NPT PartNo.5560
Straight MalePart No.130098-0166
Part No.5603
1 NPTPart No.130099-0145

Page 23 of 41

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.875-1.000 inch
(22.2-25.4mm)diameter－

IHE0340G
Parts
Power Supply Cable

Plug Cap

Strain Relief
Locknut

Type
RO-FLEX 7700T AWG18*4 3m
PartNo.7700 0007504
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1620P
3 pole 4 wiring ground3phase 480V,20A, NEMA L16-20
Max-Loc 1/2NPT Part No.5528
Straight MalePart Number: 130098-0069
Part No.5601
1/2 NPT
Part No.130099-0143

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.375-0.437 inch
(9.5-11 mm) diameter－

IHE0640G
Parts
Power Supply
Cable

Plug Cap

Strain Relief
Locknut

Type
RO-FLEX 7700T AWG18*4 3m
PartNo.7700 0007504
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1620P
3 pole 4 wiring ground3phase 480V,20A, NEMA L16-20
Max-Loc 1/2NPT Part No.5528
Straight MalePart Number: 130098-0069
Part No.5601
1/2 NPT
Part No.130099-0143

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.375-0.437 inch
(9.5-11mm) diameter－

IHE1140G
Parts
Power Supply
Cable

Plug Cap
Strain Relief
Locknut

Type
RO-FLEX 7700T AWG16*4 5m
PartNo.7700 0015004
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1620P
3 pole 4 wiring ground3phase 480V,20A, NEMA L16-20
Max-Loc 1/2NPT PartNo.5528
Straight MalePart Number: 130098-0069
Part No.5601
1/2 NPT
Part No.130099-0143

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.375-0.437 inch
(9.5-11mm) diameter－

IHE2340G
Parts
Power Supply
Cable

Plug Cap
Strain Relief
Locknut

Type
RO-FLEX 7700T AWG14*4 5m
PartNo.7700 0025004
Standard UL62
Cable Designation STO (600V,105C)
Industrial Hart-Lock Locking Device
Part No. CWL1620P
3 pole 4 wiring ground3phase 480V,20A, NEMA L16-20
Max-Loc1/2NPT PartNo.5534
Straight MalePart No.130097-0327
Part No.5601
1/2 NPT
Part No.130099-0143

Page 24 of 41

Vendor

Applicable Cable
Size

NICHIGOH－

Cooper Wiring Devices－

DANIEL WOODHEAD
Molex
DANIEL WOODHEAD
Molex

0.562-0.625 inch
(14.3-15.9mm)diameter－7.3 Accessory Storage
7.3.1 Accessory Storage for IHE0110A and IHE0120G
The accessories of I-type cores N-CI-1815, N-CI-1825, and N-CI-1835 are found in theaccessory storage bag (N-CA-0001). I-type core, the temperature sensor N-CTC-300, and thepower supply cable are stored inside in the main body of the bearing heater.
Unlock the side-panel lock by lowering the snap-fit and open the side-panel.

Slide-panel lockFig 7-11

Fig 7-12

Power Supply Cable

Temperature Sensor（N-CTC-300）

Accessory Storage Bag（N-CA-0001）

Fig 7-13

Page 25 of 41

7.3.2 Accessory Storage for IHE0320G, IHE0340G, IHE0620G, and IHE0640G
The following accessories are stored in the main body of bearing heaters.
(A) 3 types of I-type cores
N-CI-2525, N-CI-2535 and N-CI-2545 for IHE0320G and IHE0340G
N-CI-3725, N-CI-3735 and N-CI-3755 for IHE0620G and IHE0640G(B) 2 types of I-type core guides
N-CS-2525 and N-CS-2535 for IHE0320G and IHE0340G
N-CS-3725 and N-CS-3735 for IHE0620G and IHE0640G(C) Temperature Sensor N-CTC-500
Find the accessories in the opening section at the side (see figure below).

The opening section

Fig 7-14

Page 26 of 41

7.3.3 Accessory Storage for IHE01120G, IHE1140G, IHE2320G, and IHE2340G
The following accessories are stored in the main body of bearing heaters.
(A) 3 types of I-type cores
N-CI-5235, N-CI-5255 and N-CI-5270 for IHE1120G and IHE1140G
N-CI-6735, N-CI-6755 and N-CI-6785 for IHE2320Gand IHE2340G(B) 2 types of I-type core guides
N-CS-5235 and N-CS-5255 for IHE1120G and IHE1140G
N-CS-6735 and N-CS-6755 for IHE2320G and IHE2340G(C) I-type core lift up tool… Accompanying sheet, I-type core lift up tool instruction
manual is attached.
N-CL-578 for N-CI-5255, N-CI-5270, N-CI-6755, N-CI-6785(D) Temperature sensor N-CTC-1000
Find the I-type cores on the right part of the support frame and the other accessories in thestorage compartment as shown in the figure below.

I-type core guide,I-type core lift-up tool,
Temperature sensor
Fig 7-15

Page 27 of 41

Three types ofI-type cores7.4 The method of I-type core removal device(Built into Slide Type Bearing Installation Table)(IHE0320G, IHE0340G, IHE0620G, IHE0640G, IHE1120G, IHE1140G, IHE2320G,
IHE2340G)
1) Operating instructions for the I-type core removal device(Before heating process starts)(i) Ensure that the ① I-type core removal device is drawn to the far-right portion
as shown in Figure 7-16.
(ii) Select one of the three different types of I-type cores to suit the inside
diameter of the bearing to be used.
Refer to I-type core in Table 6-1 for the meaning of I-type core type.
(iii) If you use the ② I-type core other than the largest cross-section for the type,
insert the I-type core guide shown in Figure 7-17 into the core insertion part of
the I-type core removal device. (The side with the stainless steel board is to be
upside.)(iv) Place the ③ bearing on the I-type core removal device(v) Stand the ② I-type core on the ① I-type core removal device as indicated in
Figure 7-16.
(vi) Lower the ④ lever and slide it toward the ⑤ main core.
(vii) Release the ④ lever after the ② I-type core touches the ⑤ main core as
indicated in Figure 7-18.
2) Operating instructions for the I-type core attaching and detaching device(After completion of heating process)(i) From the state of Figure 7-18, lower the ④ lever and pull it until it is asshown in Figure 7-16.
(ii) Detach the ② I-type core.
(iii) Remove the ③ bearing from the I type core removal device. When you do this,be sure to use gloves since the bearing is hot.

Page 28 of 41

Using the I-type core removal device (Start of heating)Fig 7-16

I-type core guideFig 7-17

Fig 7-18
Page 29 of 41

8. HEATING PROCEDURES
8. 1 Control Panel Operation
8.1.1 Preparing for heating(1)Ensure that the machine placement complies with all the safety requirements asoutlined on page 3 and with the warnings on the attached safety-warning label on
page4.
(2)Connect power supply cable. Make sure the plug is correctly inserted in the socket
and connect to properly grounded outlet only.
(3) Apply grease enough the polishing face of I-type core and the main core.
The lack of grease may cause rust, noise, and vibration. Also, metal shavings, dust etc
between the I-type core and the main core may cause the vibration and noise.
＊Use the low combustive grease.
8.1.2 Heating Procedures
There are two control modes, Temperature Control Mode and Timer Control Mode.
For heating procedure, refer “8.1.3 Flow Chart. For the operation of the control panel,
follow explanation of operation panel as described in part “6.2 Full View and Part
Description (2) Operation Panel”.
1) Set the bearing and install I-type core so that it pass through the bore of the bearing andthe polished faces of the main core and the I-type core meets each other.
2) For Temperature Control Mode, connect a temperature sensor to the yellow socket ofthe main body and mount the detection end of the temperature sensor so that it firmly
contacts the inner rim of the bearing.
3) Turn the circuit breaker to the ON position. （ON→RED）
4) Please enter the set temperature. (The initial value of 110 ° C is displayed.) Select either
the Temperature Control Mode or the Timer Control Mode. Set the setting temperature(Temperature Control Mode) or input the heating time (Timer Control Mode).
*In Temperature Control Mode, confirm that the temperature display proper to thelocation used (Celsius or Fahrenheit) is selected.
*In the case necessary, especially in the case where it is necessary to heat slowly, set thepower reduction to prevent the damage to the bearing due to quick heating.
By setting the power reduction, the power can be adjusted by 10% steps, from 100% to50%.
5) Press the start button.
6) During the operation, the operation panel will display either the current temperature of
the inner rim of bearing (Temperature Control Mode) or the time countdown (Timer
Control Mode).
7) Once the heating is completed, the buzzer will sound. In Temperature Control Mode, thetemperature of the inner ring is retained with the blinked indication of “H” in the display,
until the stop button is pressed, as the automatic demagnetization is followed. In Timer
Control Mode, the automatic demagnetization is followed on the completion of heating andbuzzer is stopped when the stop button is pressed.
8) Remove the bearing (use heavy gloves to prevent burning).
9) Turn the circuit breaker to the OFF position. (OFF→GREEN) In the case of continuous
heating, after installing the bearing, type I core, and temperature sensor follow theprocedure from 4) to 8).
Page 30 of 41

8.1.3 Flow Chart
A heating operation flow chart is pictured as below. Ensure that operators follow the correct
operating procedures at all times.
Manual Demagnetization

Connect the power supply.

STOP

＋

Output Adjustment Mode
(Default setting 100)

Set bearing and I-type core.

STOP

＋

Temperature Display
Celsius(℃) ⇔Fahrenheit(F)＋ STOPTIMER CONTROL MODE

TEMP. CONTROL MODE

Connect the temp. sensor.
Install temp.sensor at the
inner ring.

If temp. sensor is not connected,

Turn circuit breaker on.
Operational panel is on

is displayed.

Default setting
110℃

Default setting
0 Sec.

Set the heating time. on

Set the heating temp.on

START

Start heating.
The current temp is
displayed.

START

The buzzer beeps when the set
temp. is reached.
Temp. retention starts.
The buzzer beeps during thetemperature retention.

STOP

Start heating.
The countdown isdisplayed.

When the heating is done,
the demagnetization starts
automatically and the buzzer
beeps.

Temp.retention end
Automatic demagnetization
The buzzer is stopped.

STOP

The buzzer is stopped.

Heating isfinished.

Page 31 of 41

8.2 Sequence Operation (External terminal operation)
In addition to heating on Control Panel Operation (Standard), it is possible that the heater canbe controlled by PLC (programmable logic controller) or other FA controller in a customer’s
automation system.
It has six input terminals and two output terminals, and the functions as below.
(1) The operation mode can be changed from Control Panel Operation to Sequence Operationand vice versa with an input terminal signal.
(2) Sequence Operation has two control modes, temperature control mode and forced heating
mode (open loop heating), and able to select the mode as necessary.
(3) In temperature control mode, it is possible to set three temperature setting values at
maximum preset at our factory shipment other than the setting on the operation panel.
(4) It outputs the operation condition of bearing heater and informs the upper controller of theheating situation.
Control Panel Operation is standard in IHE series.
If you need the sequence operation, please contact Etoh Inc.

9. MAINTENANCE AND SPARE PARTS
Do not disassemble the product(s) for repair without any manufacturer’s permission
and/or authorization.

9.1 Preventative Maintenance(A) The polished face of the main core
The polished faces of the main core are susceptible to rust and/or scratch. Keep thepolished face greased to prevent oxidization. Any kind of rust and/or scratches may cause
vibration and loud acoustic noise around the main core during heating.
(B) I-type core
The polished face of I-type core is also susceptible to rust and/or scratching. Keep thesurface greased to prevent oxidization. Also, I-type core consists of multiple thin, fragile
layers of electrical steel sheets that may be damaged if dropped or exposed to equivalentmechanical shock.
Do not use the broken I-type core.

9.2 Spare Parts
I-type core and the temperature sensor are susceptible to damage. It is recommended that theI-type cores and the temperature sensor are kept as spare parts for your uninterrupted
operation. Contact the shop where you purchased the unit or the manufacturer in the front
page if you would like to purchase the items listed in Table 7-2.

9.3 Cleaning Instruction
When the product(s) become dirty, wipe with a cloth and proper cleaning agent. Also, avoid
cleaning during heating and immediately thereafter. Do not wash the product(s) with water.

Page 32 of 41

10. TROUBLESHOOTING
Table 10-1 Main Problems and Possible Solutions
Problems
Cause
Possible solution
The power supply is not
Check if the power supply is correctly connected.
correctly connected.
Confirm the circuit breaker ON/OFF－ A possible cause is a short circuit or electrical
The circuit breaker has
overload. After removing the cause, reset the circuit
tripped.
breaker.
The operation－The inside of IHE may be broken and short circuited.
panel displays
Consult manufacturer.
nothing.
The cable may haveContact manufacturer.
disconnected from theoperation panel or thecable is broken.
For causes other thanContact manufacturer.
described above.
AbnormalRust and/or scratch on
Clean the mating faces of the main core and the I-typevibration or
the polished face of I-type core. Grease before operation.
loud noisecore and/or main core.
occurs during
Replace the new I-type core.
Broken the I-type coreheating.
Consult manufacturer.
Broken the main core
If any of the breakdown indications shown in Table 10-2 occur, press the reset (stop)
button. When the cause of a breakdown has been found and removed, the operation panel
should return to normal display.

Page 33 of 41

Breakdown indications on the operation panel and countermeasures
Table 10-2.
Display Panel

====

uuuu

Meaning
The temperature sensor is
not connected or has abroken wire.

Improper installation of
the temperature sensor

Overheating of main coil
COIL
Low-voltage protection
LV

Lin

Cause & Possible Solution
・Check the connection of the temperature sensor.
Be aware of the polarity (+ and -) of the sensor.
・Check for a broken wire. Replace sensor with new unit.
・The temperature sensor has not been installed correctly.
Place the detection end of the temperature sensor so that it
contacts with the inner rim of the bearing. Note that
deforming the contact plate will result in the incorrect
measurement of the temperature.
・The contact plate of the temperature sensor is damaged.
The thin wires of the thermocouple are welded inside thecontact plate. Applying excessive stress to this part may
cause internal damage.
・Temperature setting is 32℃ and under.
Set the temperature 33℃ and more.
・If the heating coil is overheating due to some cause, thisprotection feature automatically activates.
Wait for the heating coil to cool down.
Reset unit.
・The voltage of input power source has decreased.
Check if the power-supply voltage is lower than the rated
value.
・The wiring of one phase is disconnected or broken.
Check if this is the case.

Input open-phase
protection

・Consult manufacturer.
Over-current protectionOC
Over-voltage protection
OVOH

Inverter overheating
protection

・The input voltage is higher than the rated voltage.
Check the power-supply voltage.
Consult manufacturer
・Check if the outside air temperature is not in the rated
range.
・Check the cooling fan on the inverter to make sure it has
not malfunctioned.
・For causes other than described above, consult
manufacturer.
・Contact manufacturer if it occurs continuously.

Over-load protection
OLV・Contact manufacturer.

0℃
0℃
If the power adjustment (Power Reduction) is set in Temperature Mode, make sure again thatthe temperature sensor is properly installed because the “uuuu” protection is bypassed in thiscase.

Page 34 of 41

Instruction Manual IHE series

11. SPECIFICATIONS
型式
Heating Capacity
Applicable Bearing
Size

Heating Bearing type

IHE0110A

kVA

Characteristics

IHE1120G

IHE1140G

IHE2320G

11.8 kVA

IHE2340G
23 kVA

35

35

50

50

300

400

600

800

Thickness (mm)

70

110

200

300

400

Weight (kg)

12

40

80

300

600

Can heat pre-greased bearingYes

Can heat sealed bearing

Yes
SingleVoltage (V)100 - 120

Frequency (Hz)Three
200 - 240

200 - 240

50 / 60
10Three
380 - 480

200 - 240

50 / 60
5

10

Three
380 - 480

200 - 240

50 / 60
5

10

Three
380 - 480

200-220(50Hz)

380-440(50Hz)

200-230(60Hz)

380-480(60Hz)

50 / 605

20

50 / 60
10

20

347

565

745

W(mm)

175

295

380

600

850

L(mm)

470

755

975

1250

1600

81(12.5)200(33.7)335(54.2)

75×70

95×85

43(6.6)33

ModeAccuracySpecifications

Core cross section (mm)50

Sequence Operation

Temp Display

Temp Display

100%

300μT(3G)
1.5T
42×35

56×45

62×55

Operation

Specifications

99 分 59 秒
1s

Demagnetization
Maximum Flux (T)

250℃
1℃

0

By 10%

Heating Core

1440

K-typeAccuracy
Range

Reduction

13.2(2.4)

Temp sensor type

Timer Control
Power13.6(2.4)

Range

1200

40

H(mm)

Control Mode

Operation

IHE0640G
6.6 kVA

20

TemperatureSpecifications

IHE0620G

200

Body weight (kg) (accessory weight)

Control

IHE0340G
3.3 kVA

Maximum outside diameter (mmφ)

Rated Current (A)Dimensions of body

IHE0320G

Minimum bore diameter (mmφ)

PhasePower Supply

IHE0120G
1kVA

Operator with LEDs
Yes
Celsius/Fahrenheit

Application site

Indoor (No corrosive gas, dust, direct sunlight, condensation etc)

Over voltage Category

2

2

3

3

3

3

Environment

Pollution Degree）

2

2

2

2

2

2

Specifications

Ambient Operating Temp.

10℃～35℃

Altitude

2000m max

Ambient Operating Humidity.

85% RH max

Page 35 of 41

Instruction Manual IHE series

Table 11.1 Standard and Optional Accessories

Type

IHE0110A IHE0120G

N-CI-1808(diameter:12-20)
N-CI-1815(diameter:20-35)
N-CI-1825(diameter:35-50)
N-CI-1835(diameter:50 over)

OptionOOO

IHE0320G IHE0620G IHE1120G IHE2320G
IHE0340G IHE0640G IHE1140G IHE2340G

OptionOOO
OptionOOON-CI-2515(diameter:20-35)
N-CI-2525(diameter:35-50)
N-CI-2535(diameter:50-70)
N-CI-2545(diameter:70 over)

OptionOOON-CI-3715(diameter:20-35)

I-type core

N-CI-3725(diameter:35-50)
N-CI-3735(diameter:50-80)
N-CI-3755(diameter:80 over)

OptionOOON-CI-5225（diameter:35-50）
N-CI-5235（diameter:50-80）
N-CI-5255(diameter:80-100)
N-CI-5270(diameter:100 over)

OptionOOON-CI-6725(diameter:35-50)
N-CI-6735(diameter:50-80)
N-CI-6755(diameter:80-130)
N-CI-6785(diameter:130 over)

OptionOO

N-CS-2515(for N-CI-2515)
N-CS-2525(for N-CI-2525)
N-CS-2535(for N-CI-2535)

OptionOO

N-CS-3715（for N-CI-3715）
N-CS-3725（for N-CI-3725）

I-type core guideN-CS-3735（for N-CI-3735）

OptionOO

N-CS-5225（for N-CI-5225）
N-CS-5235（for N-CI-5235）
N-CS-5255（for N-CI-5255）
N-CS-6725（for N-CI-6725）

OptionN-CS-6735（for N-CI-6735）

O

O
O
O

O

O

N-CS-6755（for N-CI-6755）

I-type core lift-up tool

N-CL-578
N-CTC-300（length:300mm）

OOO

Temperature Sensor N-CTC-500（length:500mm）
N-CTC-1000（length:1000mm）

Accessory
Storage Bag

N-CA-0001

O

O

Page 36 of 41

OInstruction Manual IHE series

12. LIMITED WARRANTY(1) Warranty period
The warranty period is one year from the date of purchased or 3000 hours on total power activation hours,
whichever occurs first
Accessories, such as I-type cores and temperature sensor, are not included in this warranty.
(2) Warranty Coverage
Regarding any trouble under normal operation when used in compliance with Instruction manual, therepair of product is covered.
Warranty is limited as mentioned as above.
Indirect or consequential damages including damage of other devices, loss of business, loss of opportunity,
loss of profits are not covered.
(3) Disclaimer
The warranty does not apply to products if the trouble is caused by any of following:① Improper installation, environment, the usage except the description in the instruction manual andUser’s guide② Causes originating from other than this product (Bearing Heater)③ Repairs or alteration not authorized by manufacturer④ Causes which could not have been foreseen with the level of science and technology at the time ofshipping from manufacture⑤ External causes which are out of manufacture’s responsibility such as fire, earthquake, war, flood,
lightning strike, abnormal voltage etc.

Page 37 of 41

Instruction Manual IHE series

Appendix
Appendix 1: Inner Diameter Expansion Temperatures
E x p a n s io n o f in n e r r in g fo r te m p e ra tu re d iffe re n c e
200△T = 1 2 0 ℃△T = 1 0 0 ℃

Expansion of inner ring (μm)

150

△T = 8 0 ℃△T = 6 0 ℃
100△T = 4 0 ℃

50△T = 2 0 ℃

0
0

50

100

150

200

250

B o r e d ia m e te r o f b e a r in g ( m m )Reference
According to the diagram as above, temperature difference needs to be above 50℃ in the situation ,thebore diameter :100mm, shaft fitting: n6.
Fitting would be difficult if the bore of bearing get cold after the heating.
It is recommended that the target temperature is 20~30℃ higher than required temperature.
Don’t heat above120℃ when you heat the bearing.

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Appendix 2: Safety Instruction
Appendix 2.1 Definition of Warning Symbols
Indicates a potentially hazardous situation which, if not avoided, could result in death orserious injury.

Indicates that mishandling may result in unexpected danger and that the operator may be atrisk of injury or the equipment is at risk for damage.

Indicates caution. Specific cause may be stated in this symbol.

Indicates forbiddance. Specific cause may be stated in this symbol.

Indicates compulsion or direction. Specific cause maybe stated in this symbol.

Appendix 2.2 Warnings
Do not plug in or pull out power cord or operate the machine with a wet hand. Failure toobserve this may result in severe injury through electric shock.

Never put finger, other body parts or foreign materials in the machine. Failure to observe thismay result in unexpected injury.

This machine is for industrial use. Inexperienced personnel and children should not touch themachine. It could cause unexpected injury.

Turn the power off and unplug machine prior to replacing any parts or during maintenance of
this machine. Failure to observe this may result severe injury.

Do not use this machine for anything other than its specified applications. Use of the machinefor unintended applications can cause unexpected injury or machine failure.

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Appendix 2.3 Caution

Do not wet the machine. Do not install the machine at a location that is at risk of water splash.
Failure to comply with this warning could cause unexpected injury, electric shock or machine
failure.

Never modify or disassemble the machine. It can cause unexpected injury or failure of themachine.

Don’t use the machine at the place where external noise and surge may intrude.
It can cause unexpected injury or failure of the machine.

Don’t use the machine when a lightning strike may occur.
Turn off the main power and unplug the machine.
It can cause failure of the machine, electric shock or fire.

Turn off the main power when not in use.
It can cause unexpected injury or failure of the machine.

Always plug in or pull out the power cord holding the power plug. Never pull on the cord.
Pulling on the cord may cause electric shock, short, and fire.

Never put any foreign objects into the machine. It can cause machine failure.

Operator’s presence is always required during the operation. Turn off the main power andunplug the machine when not in use.

Do not damage the power cord.
The power supply cable should not be touched in the heated parts.
It can cause electric shock, short circuit, or ignition.

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Instruction Manual IHE seriesInsert the power plug securely into an electric outlet. A lose fitting plug may result ingeneration of heat and fire.

Do not operate in places where temperature, moisture, dirt, or dust may be excessive. It cancause machine failure.
Do not place the flammable material in the vicinity of this products. It may cause the fire.
Do not place this product in the place blocking up the vent.
It may cause the fire.

Install the machine on a flat and stable surface.
Dropping of the machine may cause injury or machine failure.
Always lock the safety stoppers on the wheels except moving of the machine.

To provide continued protection against electric shock, connect to properly grounded
outlets only.

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