Precision Instruments & Allieds; manufacturer of Precision Induction heater   An ISO certified company URS  

(Mounting & Dismounting of Shrunkfit Inner Races of Cylindrical Roller Bearings)


Precision Induction Heater Series PIR is specially designed for mounting & dismounting the inner races of cylindrical Roller Bearings used on the axles of Railway Rolling stock and in Traction Motors using latest technology intelligent microcontroller based electronic controls. It can be used in others industries with similar application.

Precision Induction Heater series PIR are safe, fast and economical heating of Inner races of cylindrical roller bearings.

When a component is heated with the induction coil it acquires magnetism strong enough to attract iron particles, iron dust etc. To deal with this phenomenon, it is necessary to eliminate the residual magnetism after heating. The designs of the control panel of precision Induction Heater Model- PIR 40 permits fast demagnetization by use of the heating coil itself. The Induction Coil can be used for demagnetization as well as heating.


When Alternating Current flows through a coil wound around a component; it creates an oscillating magnetic field, which includes current in the component. The magnetic field takes the path of least resistance and also due to the skin effect; the outer periphery of the component gets heated more rapidly than the core.

Based on the above principle, a ring shrunk fitted on the shaft will get heated more rapidly causing a temperature differential between the two. The difference in the temperature will cause the ring to expand to a stage where it overcomes interference and can be dismounted easily.


1) Induction heating is more safe, reliable & clean process.
2) Even unskilled labor can be trained to operate the equipment easily.
3) High heating rates can be easily achieved.
4) Precise Temperature and Time controls are achieved through state of the art technology used in heaters.
5) Lower cost & high efficiency are the plus points of Induction Heating.

Induction Heater
Induction Heater PIH: 2000 (2.0/2.6 KVA)
Induction Heater PIH: 2002 (6.0 / 8.0 KVA) Induction Heater PIH: 2002SPL(4.6/6.0KVA) Induction heater PIH: 2003 (11 / 16 KVA)
Induction Heater PIH: 2003SPL(10.5/11KVA) Tyre Induction heater PIH: 2005(60/127 KVA)
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