Introduction; Intended Use; Principle Of Operation - SKF TIH 030m Instrucciones De Uso

1

INTRODUCTION

The SKF TIH 030m induction heater is designed to heat bearings that 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 030m 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 030m. 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 TIH 030m generates heat by means of a large
electrical current that is magnetically induced in the
workpiece by a coil within the heater.
The high voltage, low current electricity flowing
through the large number of windings in the
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 030m 7