Precautions For Using Bearing Heaters

Working Principle of Bearing Heater

The working principle of a bearing heater is to utilize the eddy current generated by metal in an alternating magnetic field to make the metal heat itself, which is commonly used in metal heat treatment and other aspects. When the heater is started, after high-voltage low alternating current passes through the primary coil (heater) with multiple turns, a low-voltage high current is generated inside the workpiece to be heated, making the heated workpiece a secondary coil. The high current flowing through the workpiece heats it. Since the high current only passes through the workpiece, only the workpiece will be heated and its temperature will rise.

Precautions for Using Bearing Heater

Electromagnetic Field Safety
Induction heaters generate induction magnetic fields, which may affect or damage some medical devices such as pacemakers or hearing aids, causing serious harm to the body. Therefore, do not operate the heater when wearing these medical devices, or it is recommended that the wearer stay at least 5 meters (16 feet) away from the heater.

Burn Prevention
Heated workpieces may cause burns. Therefore, use high-temperature-resistant gloves (suitable for high temperatures up to 150°C (302°F)) when handling these workpieces.

Prohibition in Flammable and Explosive Areas
Do not use the induction heater in areas with flammable or explosive hazards.

Proper Maintenance and Handling
Proper maintenance and handling of the heater are crucial. If it is not operated in accordance with the User Manual, it will cause equipment operation failures, thus posing a risk of serious harm to the body.

Good Grounding of Power Supply
The grounding wire of the power supply must be in good condition.

Forbidden to Press Start Button Before Placing Yoke
Before placing the yoke on the main unit, it is strictly forbidden to press the start button, otherwise, the instrument will be damaged or the fuse will be blown.

Avoid Long-Term Contact of Magnetic Probe with Heated Workpiece
Do not place the magnetic probe on the heated workpiece for a long time to extend the service life of the probe. When heating bearings of the same specification, try to use time control to extend the service life of the probe.

Temperature Limit for Ball Bearing Heater
The temperature of the ball bearing heater must not exceed 150°C, otherwise, the bearing will be annealed.

Bore Expansion Reference During Heating
When the bearing is heated, refer to the following table for the bore expansion. Pay attention to the high temperature when taking away the workpiece to prevent burns.

Remove Heating Components After Power Off
The heating components in the yoke must be taken out only after the main unit is powered off.

Proper Placement of Main Unit
The main unit must be placed flat without tilting, and the yoke must fit the end face of the main unit.