Introduction; Intended Use; Principle Of Operation - SKF TIH L Instrucciones De Uso

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1. Introduction

The SKF TIH L induction heater is designed to heat bearings, which are mounted with an
interference fit onto a shaft. The heat causes the bearing to expand, which eliminates the
need to use force during installation. A 90 °C (162 °F) temperature difference between the
bearing and shaft is generally sufficient to enable 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 TIH L has been designed to heat rolling bearings and other metal workpieces that
form a closed circuit. Examples of acceptable workpieces include housings, bushings,
shrink rings, pulleys, and gears. All bearings that fit over the yoke and between the
induction coils can be heated using the TIH L. In addition, other workpiece can also be
placed over the outermost induction coil. See the illustrations at the beginning of this
manual for examples.

1.2 Principle of operation

The principle of operation of the TIH L can
be compared to a transformer.
The high voltage, low electrical current
flowing through a large number of windings
in the TIH L's induction coils induces low
voltage, high current electricity in the
workpiece.
Because the workpiece has the electrical
characteristics of a coil with a single, short-
circuited winding, the high current generates
heat within the workpiece.
Because the heat is generated within the
workpiece, all of the heater components
remain cool.
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SKF TIH L