8
9
The heaters are designed to heat the work piece up to a maximum tem-
perature of 240ºC (464ºF), with the exception of the VHIN10 series models
where the temperature is limited to a maximum of 150ºC (302ºF) and spe-
cial custom-designed heaters where the maximum temperature can be
as high as 480ºC (896ºF).
Timken Induction heaters can be used on continuous bases. There is how-
ever 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.
Caution:
• Bearings generally should only be heated up to a maxi-
mum temperature of 120ºC (248ºF).
• Precision bearings should only be heated up to a maxi-
mum temperature of 70ºC (158ºF). Heating to higher
temperatures may affect the metallurgical structure
and dimensional stability resulting in premature bear-
ing failure or loss of bearing performance.
• Do not use induction heaters for bearings or work pieces,
which are outside the minimum, or maximum dimen-
sions 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 tem-
perature of 0ºC to 50ºC (32ºF to 122ºF), 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
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