Introduction - Timken VHIN 10 Mode D'emploi

Heights are measured from the bottom of the heater. To
determine where the field is exactly in relation to the floor,
the distance from the bottom of the heater to the floor should
be added on to the values mentioned in the table. (e.g. the
height of a workbench).
Failure to observe the following warnings could
create a risk of death or serious injury.
• We advise a safety distance of at least 1 metre for
people working near the machine.
Failure to observe the following cautions could
create a risk of injury.
• The machine produces an induction field that can
influence electronic equipment, e.g. watches,
magnetic charts etc.
2.

Introduction

Application
Timken Induction Heaters are designed to heat bearings,
bushings, gear wheels, couplings or other metallic work pieces
which form a closed electrical loop. This will facilitate mounting
where an interference fit is required.
The heaters are designed to heat the work piece up to a
maximum temperature of 240º C (464º F), with the exception
of the VHIN10 series models where the temperature is limited
to a maximum of 150º C (302º F) and special custom-designed
heaters where the maximum temperature can be as high as
480º C (896º F).
Timken Induction heaters can be used on continuous bases.
There is however a limitation; do not operate heater at a
temperature of 240° C (464° F) or more for more than half an
hour. By heating with the time function this has to be checked
with an external temperature meter.
WARNING
CAUTION
Failure to observe the following cautions could
create a risk of injury.
• Bearings generally should only be heated up to a maximum
temperature of 120º C (248º F).
• Precision bearings should only be heated up to a maximum
temperature of 70º C (158º F). Heating to higher temperatures
may affect the metallurgical structure and dimensional
stability resulting in premature bearing failure or loss of
bearing performance.
• Do not use induction heaters for bearings or work pieces,
which are outside the minimum, or maximum dimensions as
specified in the technical data (Appendix 1).
• Do not switch off the heater with the main switch while
heating cycle is running.
Operating conditions
Designed to be used in an industrial environment with an
ambient temperature of 0º C to 50º C (32º F to 122º F), and an
atmospheric humidity of between 5% to 90%. The induction
heater is meant for indoor use only.
Principle of operation
The heater works in the same way as a
transformer. The primary coil is the heater
and the secondary coil is the work piece.
When the heater is switched on, a high
voltage, low alternating current passes
through the numerous windings of the
primary coil. This induces a low voltage,
high current in the work piece acting as the secondary coil.
This high current results in the heating up of the work piece.
The current is only flowing in the work piece, hence it is only
this which starts to heat up. The work piece is automatically
demagnetised at the end of each heating cycle.
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CAUTION