It is important to realize that the bearing heaters can be used for much more than just bearings. Many also use these heaters for gears, rings, couplings, and other items. As always, you will want to make sure you read the instructions thoroughly and that you know what is and is not allowed in the unit before you start using it. Heating is a perfect method of shrink fitting.
Most of the options on the market today are very easy to use, as they have simple operation. Modern units have built-in protection so you do not have to worry about overheating. Of course, since there are a range of options on the market, you have to remember that the features and options on each of them may be somewhat different.
Many of the quality options on the market today will allow the operator to determine the perceive temperature, as well as the precise amount of time for the heater to warm the bearings. They feature a temperature probe that will measure the interior. Most will also have a screen that will let you know the actual temperature inside of the bearing heater unit.
Good bearing heaters will also offer demagnetization for the pieces after it is through with the heating. This can make installation easier. Some will also offer signals that let you know when the heating and demagnetization cycle is complete. The signals are usually lights and sounds.
Some of the popular manufacturers of these units today include EddyTherm, EasyTheme, and SKF.