Introduction; Intended Use; Principle Of Operation - SKF TIH 100m Mode D'emploi

1

INTRODUCTION

The SKF TIH 100m 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 100m has been designed to heat rolling bearings. However, other metal
workpieces that form a closed circuit can also be heated. Examples of acceptable
workpieces include bushings, shrink rings, pulleys, and gears. All bearings that fit
over the inductive coil and between the vertical supports with the top yoke in place
can be heated using the TIH 100m. In addition, smaller bearings can be placed
over any of the three standard yokes. See the illustrations at the beginning of this
manual for examples.
1.2

Principle of operation

The principle of operation of the TIH 100m can be
compared to a transformer.
The high voltage, low electrical current flowing
through a large number of windings in the
TIH 100m's inductive coil 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.
SKF TIH 100m 7