What is a bearing induction heater?
Bearing induction heaters let users precisely control the process of mounting bearings onto a shaft or dismounting them. Other methods, like torching or heating bearing in a hot oil bath, don’t offer the safety and control of an induction bearing heater.
What temperature do you heat a bearing?
A good general rule of thumb is to heat bearings to a temperature 150 F greater than shaft temperature. This is sufficiently warm to allow the bearing to slide over the shaft while not hot enough to damage any components. In any case, do not heat open bearings above 250 F.
What are bearing heaters used for?
Heating bearings is a good way to temporarily expand the bearing rings to facilitate mounting without the use of excessive force that could damage bearings. Heaters can be used for mounting or dismounting by efficiently heating bearings and workpieces (gears, sprockets) large and small.
Can you heat up a bearing to remove it?
Removing bearings with induction heaters You can wrap the coils of the induction heater around the bearing. This allows you to heat the bearing very quickly and with great precision, without heating the shaft. This allows you to lift the shrink connection quickly and easily.
What is the recommended temperature for mounting by induction heating?
Normally a bearing temperature of 80 to 90 °C (144 to 162 °F) above that of the shaft is sufficient for mounting. Never heat a bearing to a temperature greater than 125 °C (257 °F), because the material may change metallurgically and produce alterations in diameter or hardness.
How do you heat a bearing?
An oven may be used, or a more convenient solution is an induction heating system. In addition, the temperature must be high enough (maximum of 130°C for a bearing) to generate sufficient expansion and temporarily loosen the fit, so that the sprocket or bearing can easily be mounted.
How hot can induction heating get?
Depending upon the material being heated, temperatures as high as 2,200° F (1,200° C) can be achieved. Induction heating is clean, requiring no fossil fuels. Parts exposed to induction heating simply heat up, so there’s no cleanup afterward and no worry about contamination of the work piece. It’s also fast.
How much will a bearing expand when heated?
Approximately 6 microinches (0.000006″) per 1 degree Fahrenheit, per inch of shaft length. (This expansion rate depends on the material in use; gray cast iron is typical.)