Induction Bearing Heater  The principle of a bearing induction heater can be  compared with a transformer using a primary coil with a large  number of windings turns and a secondary coil with a few  windings on a mutual iron core.  The input/output voltage ratio is equal to the ratio of  the windings, while the energy remains the same. In the case  of induction heaters, the bearing acts as a short circuit (single  turn, secondary coil) through which a low AC voltage flows at  high amperage, thus generating heat. The heater, the  induction coil and the yoke remain at an ambient temperature.  Managing the electric current flow to achieve the most  efficient heat-up rate for the bearing is vital, with the  application of uniform temperature to the bearing inner ring  being very important. Bearing-Master® induction heaters are  programmed to monitor the rate at which the bearing heats  up. If the rate is too slow an alarm will activate and stop the  heating. This is very useful where the operator may have  placed the temperature probe in the wrong location.   Demagnetization at the end of the induction heating  cycle is a critical part of the process. The residual magnetic  field in the bearing must be decreased to a minimum. Failure  to demagnetize completely means a risk of contamination  from metal particles attracted to the bearing raceways, which  can lead to bearing damage.    Key reasons to heat a bearing 1. Hot mounting for expansion of the bearing bore to overcome the interference fit when mounting a bearing directly on a cylindrical shaft. 2. Safe mounting, e.g., excluding the use of potentially dangerous cold mounting with a press. 3. An alternative to the often inappropriate cold mounting techniques, such as hammering on the outer ring of the bearing. THE TRANSFORMER COMPANY Required Details for Order Outer diameter of the Bearing. 1. Inner Diameter of the bearing 2. Weight of the bearing. 3. Frequency: Pieces needed per hour Specification • Supply Voltage: 230 Volt AC • Single phase unit • Continuously variable voltage by a manual variac • Voltage, Current and frequency Indication (VIF) meter • Input MCB of required Rating • Inbuilt Electronic Timer of required Rating • Electronics Temperature Indicator/Controller of the required temperature rating. • Separate ON & OFF switches • M. S. Enclosure duly powder coated.