NSK IHN010 Manuale utente

USER MANUAL

INDUCTION HEATER IHN010

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Table of Contents

Chapter�� Page

Safety Recommendations��3

1 Introduction��3

1�1 Intended Use��3

1�2 Principle of Operation��4

1�3 Distinguishing Feature��4

2 Description ��4

2�1 Components��4

2�2 Technical Data��5

3 Preparation for Use��6

4 Operation��6

4�1 Function of Displays ��7

4�2 Function of Buttons ��7

4�3 Temp Mode��7

4�4 Time Mode��8

4�5 Temperature Measurement ��9

4�6 Change of Temperature Unit��9

4�7 Demagnetisation ��9

4�8 Power Level Selection��9

5 Safety Features �� 10

6 Electromagnetic Field and Personal Safety �� 10

7 Troubleshooting �� 11

8 Spare Parts �� 11

›The operating instructions must be followed and kept in

a safe place at all times�

›The IHN010 device generates a magnetic ﬁeld� People

wearing a pacemaker, especially if it is an older model,

should consult their doctor before operating the device

as it could impair the functioning of the pacemaker�

Electronic equipment such as wrist watches, memory

cards, monitors and displays, magnetic tapes, etc� may

also be affected�

›Always place the device on a non-metallic surface that is

stable and dry�

›Ensure that the ventilation slots are free at all times and

the device can draw in cold air through its base�

›The device must always be connected to an AC power

network with the correct voltage as indicated on the

type plate�

›Ensure that the device does not get wet and do not

expose it to high humidity levels�

›The device must not be immersed in water or any other

liquid�

›Do not operate the device in the vicinity of heat sources

and ensure that it is placed a sufﬁcient distance away

from walls and ﬂammable objects�

›The device must not be used in areas where there is a

risk of explosion�

›Do not activate the heating process if no rolling bearing

or other workpiece is in place�

›Avoid contact with hot workpieces� Wear the supplied

protective gloves when handling hot workpieces�

›Please ensure that you always use a power and

temperature level that is appropriate for the workpiece

in question to ensure that it is heated carefully and not

damaged�

›The device is intended for heating rolling bearings� The

manufacturer accepts no liability in the event of

inappropriate or incorrect usage�

›Regularly check the plug, connecting cable and heating

cone for wear and tear or damage� If you discover any

damage, send the device to your NSK partner for

inspection�

› Do not modify the device�

Safety Recommendations

1 Introduction

The IHN010 induction heater is designed for heating rolling bearings and other ferritic, circular workpieces�The heat causes

the workpiece to expand, which eliminates the need to use force during installation�A 90°C (194°F) temperature difference

between the bearing and shaft is sufﬁcient to enable easy installation�At an ambient temperature of 20°C (68°F), the bearing

must therefore be heated to 110°C (230°F)�

1.1 Intended Use

The IHN010 portable induction heater has been designed to heat rolling bearings�Examples of acceptable workpieces include

bushings, shrink rings, pulleys, rings, etc�The IHN010 portable induction heater is primarily intended for on-site repairs and

rolling bearing replacements by service and maintenance staff�

1.3 Distinguishing Feature

The distinguishing feature of the IHN010 induction heater is the fact that the workpiece can only be placed on the cone-shaped

workpiece support for heating� The energy transfer is contact-free, and is generated via the medium-frequency coil situated be-

low� The cone-shaped workpiece support creates an optimal magnetic ﬁeld distribution in the rings of the rolling bearing, thereby

ensuring that heat is distributed homogenously� This design improves efﬁciency, resulting in lower power consumption and faster

heating, which signiﬁcantly reduces the costs of heating the bearings� This special technology allows the device to be very light

weight and portable� In addition, the device is ﬁtted with predictive temperature control (PTC)� For every heating process, the

temperature increase curve of the workpiece/rolling bearing is measured constantly, thereby optimising the heating perfor-

mance� This ensures that the target temperature is achieved quickly without overheating the rolling bearing�

1.2 Principle of Operation

The IHN010 generates a magnetic ﬁeld in the medium

frequency range (approx� 25kHz), similar to an inductive hot

plate� The magnetic ﬁeld induces a voltage targeted on the

inner ring of the workpiece� This creates eddy currents, which

efﬁciently heat the workpiece� As the heat in the workpiece is

generated by the current ﬂow, all other parts of the induction

heater remain cold� The heating process is based on the prin-

ciple of eddy currents, so the workpieces to be heated should

be composed of ferritic (magnetic) metals� In case of doubt,

simply check the workpiece using the magnet of the tempera-

ture probe� This patented heating method enables fast, easy

and energy efﬁcient heating of workpieces�

2 Description

The operation of the heater is controlled by the internal electronics in either of two modes�The operator can either select the desi-

red temperature of the bearing in TEMP MODE or set the length of time that the bearing will be heated in TIME MODE�The power

level can be adjusted in steps of 20% for slower heating of sensitive workpieces (for example, bearings with C1 or C2 clearance)�

2.1 Components

The IHN010 induction heater is comprised of a portable housing with integrated operating electronics and cone-shaped

workpiece support�A temperature probe can be attached for measuring and monitoring the temperature of the workpiece�

The mains cable is enclosed separately, as are protective gloves for safe handling of hot workpieces�All of the equipment

can be stored in the practical carrying case�

2.2 Technical Data

IHN010

Voltage (± 9%): 1 ~ 110 – 240V / 50 – 60Hz*

Recommended circuit protection 10�5A circuit breaker (240V)

6�5A circuit breaker (110 – 115V)

Power consumption (maximum) 1�5kVA

Temperature control 20 – 180°C, in steps of 1°C

68 – 356°F, in steps of 2°F

Temperature probe K-type thermocouple with magnetic bracket

Power range 20 – 100%, in steps of 20%

Time mode 0 – 10 minutes, in steps of 0�1 minutes

Operating modes Automatic temperature or time mode

Demagnetisation, automatic Residual magnetism < 2A/cm

Overall dimensions 340 x 250 x 64mm (over cone 121mm)

Weight 3�5kg

Workpiece:

Inner diameter

Width

External diameter

20mm and above

Up to 60mm

Up to 160mm

Workpiece maximum weight Up to 10kg

Workpiece materials Ferritic metals (magnetic)

Maximum heating temperature < 180°C / 356°F

Authorisations, inspections CE

* Each bearing heater family has several voltage options�Please refer to the type plate on the heater body to determine the actual operating voltage�

3 Preparation for Use

› Place the device horizontally on a stable, non-metallic surface�

› Ensure that the device’s ventilation slots are free at all times and that it can draw in cold air through its base�

› Connect the mains plug to a suitable power supply�

› The rolling bearing to be heated is placed horizontally in the centre of the IHN010 induction heater’s step-shaped support cone�

› If you are going to operate the device in TEMP MODE, connect the temperature probe with the helix cable to the left side of

the device� Make sure the polarity of the plug is correct�

› Use the holding magnets in the measuring head of the temperature probe as a quick and easy way of checking whether the

workpiece is made of ferritic metal (magnetic) and therefore can be heated optimally using the IHN010 induction heater�

› The magnetic measuring head of the temperature probe is placed on the inner ring of the rolling bearing or the innermost

point of the ring� The temperature probe is only used in TEMP MODE� When heating a workpiece in TIME MODE, the probe is

not required and does not need to be connected�

4 Operation

4.1 Function of Displays

A) The main display shows the selected heating time or heating temperature:

Display Indication

tTime in minutes

°C Temperature in degrees Celsuis

°F Temperature in degrees Fahrenheit

B) The power display shows the selected power setting:

Display Indication

•20% power

•• 40% power

••• 60% power

•••• 80% power

••••• 100% power

4.2 Function of Buttons

Button Function

POWER Press to adjust the power in steps of 20%�The selected power is indicated on the power display�

MODE Press to switch between TIME MODE and TEMP MODE�

UP (+) Press to increase the value shown on the main display�

DOWN (-) Press to decrease the value shown on the main display�

START/STOP Press to start or stop the heater�The LED on the START/STOP button is lit when the heater is heating and

ﬂashes during temperature measurement�

4.3 Temp Mode

› If the main display shows “t”, press MODE to select TEMP MODE� The main display shows °C or °F in TEMP MODE�

› The selected temperature is shown on the main display� The default temperature for bearings is 110°C (230°F)�

If a different temperature is desired, press UP or DOWN to adjust the temperature in steps of 1°C (2°F)�

› It may be desirable to heat bearings to temperatures above 110°C (230°F) for increased mounting time� To determine the

maximum permitted temperature, consult the speciﬁcations of the bearing manufacturer� Always ensure the bearing does not

lock due to an excessive expansion of the inner ring compared to the outer ring� See section 4�8�

› All Spherical Rolling Bearings (SRBs) are subjected to a special heat treatment�These bearings can be operated at temperatures

as high as 200°C (392°F)� Heating these bearings above 110°C (230°F) will not cause any damage as long as the bearing is

still able to rotate� For other bearings, a temperature of 125°C (257°F) must not be exceeded unless otherwise speciﬁed�

› Press POWER to select the power level� Use the guidelines in section 4�8 to determine the correct power setting�

› Press START/STOP to start the heater� The main display shows the current temperature of the workpiece�

› When the selected temperature has been reached, the heater demagnetises the workpiece, switches off, and generates

an acoustic signal for 10 seconds or until START/STOP is pressed�

› Press START/STOP to stop the heater�

› Always wear protective gloves and other appropriate protective equipment when removing the hot workpiece� NB: Risk of

burning� The workpiece may also be removed using suitable handling equipment�

› If the workpiece remains on the heater, the heater will start again when the temperature of the workpiece drops 10°C (18°F)�

Press START/STOP to stop the heater and demagnetise the workpiece�

› The device is now ready to heat another workpiece with the same settings�

4.4 Time Mode

› If the main display shows °C or °F, press MODE to select TIME MODE� The main display shows “t” in TIME MODE�

› Press UP or DOWN to adjust the time in steps of 0�1 minute�

› Press POWER to select the power level� Use the guidelines in section 4�8 to determine the correct power setting�

› Press START/STOP to start the heater� The main display shows the time that remains�

› When the time has elapsed, the heater demagnetises the workpiece, switches off, and generates an acoustic signal for

10 seconds�

› Press START/STOP to turn the induction heater off�

› Always wear protective gloves and other appropriate protective equipment when removing the hot workpiece� NB: Risk of

burning� The workpiece may also be removed using suitable handling equipment�

› Remove the workpiece using proper handling equipment�

› The device is now ready to heat the next workpiece with the same settings�

4.5 Temperature Measurement

When the heater is not operating, the temperature of the workpiece can be measured by pressing MODE and START/STOP

at the same time�The LED on the START/STOP button ﬂashes during temperature measurement�Press START/STOP to cancel

temperature measurement�

4.6 Change of Temperature Units

Press MODE and UP at the same time to switch between °C and °F�The temperature unit setting remains the same even after

disconnection from mains power�

4.7 Demagnetisation

According to the eddy current principle, the work piece is automatically demagnetised at the end of the heating cycle�

4.8 Power Level Selection

When heating bearings with the IHN010, it is important that bearings with small internal clearance or slight preload are

heated slowly�Slow heating ensures that the bearing expands slowly, thereby preventing damage to the bearing�In

addition, it is possible that the ferrite cage and seals could be heated more quickly than the inner-ring, due to their low mass�

The shape, weight, size, and internal clearances all affect the amount of time required to heat a bearing�The large

variety of bearing types precludes the possibility of providing a speciﬁc power level setting for each type�Instead, the

following guidelines are provided:

For sensitive bearings (little internal clearance) the power must be reduced�

› Max� 20% for small bearings (positioned around the tip of the cone)

› Max� 40% for medium-sized bearings (positioned in the centre of the cone)

› Max� 60% for large bearings (positioned at the bottom of the cone)

5 Safety Features

The IHN010 device is equipped with the following safety features:

›Power switch�

›Internal safety fuse for power electronics�

›Automatic overheating protection for the circuit breaker�

›Automatic current control for intermediate circuit and coil electricity�

›Automatic detection and power reduction if no workpiece is in place for heating�

›In the TEMP MODE the heater will switch off if the temperature probe does not register a temperature increase of 1°C (2°F)

every 15 seconds�To increase the interval to 30 seconds, press MODE and DOWN at the same time�

Bearing Cage Shield Power Max.Temp.

Deep groove ball

bearings

Steel Steel 20% 110°C / 230°F

Steel Plastic 20% 100°C / 212°F

Steel None 100% 110°C / 230°F

Other

bearings

Steel Steel 20% 110°C / 230°F

Brass Steel 20% 110°C / 230°F

Plastic Steel 20% 110°C / 230°F

Steel Plastic 20% 100°C / 212°F

Brass Plastic 20% 100°C / 212°F

Plastic Plastic 20% 100°C / 212°F

Steel None 100% 110°C / 230°F

Brass None 100% 110°C / 230°F

Plastic None 100% 110°C / 230°F

If the bearings are sealed on one side only, they must be placed on the device with the seal facing upwards�

In this arrangement, the power level of 100% can be selected�

For bearings with a steel cage or with seals, the power must be reduced�

The following table shows what power level to be selected�

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