Introduction; Intended Use; Principle Of Operation - SKF TIH 030m Mode D'emploi

Appareil de chauffage par induction, conçu pour chauffer des roulements montés avec un ajustement serré sur un arbre
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  • FRANÇAIS, page 16
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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
metalworkpieces 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
5

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