Demagnetisation; Power Level Selection; Safety Features - SKF TIH L Mode D'emploi

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5.7 Demagnetisation

The workpiece is automatically demagnetised when heating is complete. Demagnetisation
will not occur if the power is interrupted or the main switch is switched off. To use the
TIH L for demagnetisation only, select TIME MODE and set the time to 0,1 minute (6
seconds).

5.8 Power level selection

When heating bearings with an induction heater, most of the heat will be generated in the
inner bearing race. The heat will then be transferred through the bearing. It is therefore
important that bearings with reduced internal clearance are heated slowly. Slow heating
ensures that the bearing expands more 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 bearings (including bearings with C1 or C2 internal clearance) or bearings
with brass cages, do not exceed 50 % power.
• When using accessory smaller yoke, never exceed 50 % power.
Bearings should preferably be heated positioned vertically over the sliding yoke. In the
case of horizontal heating please consider the following:
• For SRB or CARB® bearings, special care must be taken when heating in a horizontal
position and subsequent mounting, especially on vertical shafts. The weight of the
rollers will always set themselves in the lowest position possible: they will be in contact
with both raceways, giving a reduction in the internal clearance. For heavy SRB or
CARB® bearings with heavy rollers we strongly recommend the use of roller centering
ring. The roller centering ring keeps the rollers in position in the middle of the
raceways during the heating process and the mounting.

6. Safety features

The TIH L is equipped with the following safety features:
• Automatic overheating protection
• Automatic current control
• Over-current circuit breaker
• In the TEMP MODE the heater will switch off if the temperature probe does not register
a temperature increase of 1 °C (1,8 °F) every 1 minute (1.00 minute). To increase the
interval to 2 minutes (2.00 minute). press MODE and DOWN at the same time
• Flashing warning light indicates ongoing heating process.
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SKF TIH L