Abstract: Many users do not know much about the principle and method of bearing heating in the bore, this article explains the heating of the bearing bore from multiple angles, which helps everyone to better understand its principle.

 The inner hole induction heater means heating from the inside hole, from the inside to the outside, and the heating principle is almost similar to ordinary bearing heating, and the heating of our bearings is also heated from the inside out, which is consistent with the direction of expansion, which is conducive to the hot installation of the inner hole.

When the inner hole is assembled with the shaft or other internal plug workpieces, it is generally tightly matched, directly installed without entering, and heated through the inner hole, the purpose is to expand and become larger through the inner hole, so as to achieve interference installation, which is often called hot sleeve.

1. Heating temperature

The highest heating temperature of the bearing is 120 °C, which is the national standard, to prevent the annealing of bearing steel and the change of metallographic structure, so the heating temperature of the bearing is determined according to the size of the bearing, the large bearing inner diameter of more than six or seven hundred millimeters is heated to 80 °C, the expansion is enough for hot installation, on the contrary, the heating temperature of small bearings is high, and the heating temperature of other workpieces needs to reach more than 200 degrees to hot load.

2. Applicable materials

 Our champion inner bore bearing heater uses the principle of vortex heating to quickly heat the inner bore of the metal workpiece, common are shaft sleeve inner hole heating, coupling inner hole heating, pulley inner hole heating and gears and other workpieces. Metal bores are not only steel, but also aluminum, copper, and even stainless steel.

3. Heating range

The bearing bore from a small 20mm to a large inner diameter of two meters, there are corresponding inner hole heaters, the model specifications are complete, to achieve full coverage of the size, the small inner bore can be hung through the sleeve heating, can also be flat heating.

4. Heating method

For workpieces with large outer diameter and small inner holes, pressure heating methods can be used, such as gears, couplings, etc., which can quickly heat wall thickness and small holes;

5. Automatic bore bearing heater

Automation is one of the trends of the future, and we have upgraded the structure of our heaters with pneumatic assistance. If the assembly quantity is large and you like the automatic type, you can choose the pneumatic structure.

 We have been engaged in internal hole induction heater equipment for 20 years, accumulated rich experience and a large number of user cases, there is always a suitable one for you.

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