4.7
Power level selection
When heating bearings with an induction heater, most of the heat will be
generated in the inner ring of the bearing. The heat will then be transferred
through the bearing. It is therefore important that bearings with small internal
clearance or slight preload are heated slowly. Slow heating ensures that the
bearing expands evenly, thereby preventing damage to the bearing.
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 precision bearings or hybrid bearings with low bearing
clearance, it is always recommended to work with two temperature
probes in Delta-T mode. By monitoring, bearing damage can be avoid-
ed.
•
For sensitive bearings (including bearings with C1 or C2 internal clear-
ance) or bearings with brass cages, do not exceed 20% power when
using the small yoke, 40% power when using the medium yoke, or 60%
power when using the large yoke.
•
When using the small yoke, never exceed 40% power.
•
When using the medium yoke, never exceed 60% power.
5
Safety features
The IH 045 is equipped with the following safety features:
• Automatic overheating protection
• Automatic current control
• In the TEMP MODE the heater will switch off if the temperature probe does
not register a temperature increase of 1° every 30 seconds. To increase
the interval to 60 seconds, press MODE and DOWN at the same time.
© simatec ag
Induction Heater IH 045
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