How to choose bearing lubricant

    1. Selection of lubricating oil for light and medium load sliding bearing The working temperature is 10-60 °C, and the journal pressure is below 3 MPa:
    Spindle journal speed > 9m / s, lubricating oil 40 ° C viscosity 5-27mm2 / s, suitable lubricants L-AN5, L-AN10, L-AN15 full loss system oil;
    Spindle journal speed 9-5m/s, lubricating oil 40°C viscosity 15-50mm2/s, suitable lubricating oil L-AN15, L-AN32 total loss system oil or L-TSA46 turbine oil;
    Spindle journal speed of 5-2.5m / s, lubricating oil 40 ° C viscosity 32-60mm2 / s, suitable lubricant L-AN32, L-AN46 full loss system oil or L-TSA46 turbine oil;
    Spindle journal speed: 2.5-1m/s, lubricating oil 40°C viscosity 42-70mm2/s, suitable lubricating oil L-AN46, L-AN68 total loss system oil or L-TSA46 turbine oil or No. 20 gasoline engine oil;
    Spindle journal speed of 1-0.3m/s, lubricating oil 40°C viscosity 42-80mm2/s, suitable lubricating oil L-AN46, L-AN68 total loss system oil or L-TSA46 turbine oil or No. 20 turbine oil ;
    Spindle journal speed of 0.3-0.1, oil 40 °C viscosity 70-150mm2 / s, suitable lubricating oil L-AN68, L-AN100, L-AN150 full loss system oil or 30# gasoline engine oil;
    Spindle journal speed <0.1m/s, oil 40°C viscosity 80-150mm2/s, suitable lubricating oil L-AN100, L-AN150 total loss system oil or 30#, 40# gasoline engine oil.
    2. The working temperature of medium and heavy load sliding bearing lubricating oil is 10-60°C, the journal pressure is below 3-7.5MPa: the spindle journal speed is 2-1.2m/s, the oil 40°C viscosity is 68-100mm2/s, suitable for Lubricating oil L-AN68, L-AN100 full loss system oil or No. 20 turbine oil;
    The spindle journal speed is 1.2-0.6m/s, the oil 40°C viscosity is 68-110mm2/s, and the applicable lubricating oil L-AN68, L-AN100 total loss system oil or No. 20 and No. 36 turbine oil;
    The spindle journal speed is 0.6-0.3m/s, the oil 40°C viscosity is 68-150mm2/s, and the applicable lubricating oil L-AN100, L-AN150 total loss system oil or No. 30 turbine oil or N100 compressor oil;
    The spindle journal speed is 0.3-0.1m/s, the oil 40°C viscosity is 100-220mm2/s, the applicable lubricating oil L-AN100, L-A150 full loss system oil or 40# turbine oil;

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Detailed introduction of rolling bearing heating

When the bearing is installed with an inner diameter of more than 70mm, or when the interference is large, the heating method is generally used to expand the bearing hole, so that the installation saves time and labor, and avoids excessive force. And the damage caused by the bearing.

At this time, it is necessary to control the heating temperature. Generally, the bearing is heated to 80 ° C, and the highest is 100 ° C. Exceeding 120 °C may cause tempering of the bearing, which will reduce the hardness and accuracy of the ferrule.

First, the common methods of bearing heating are:

1, bearing heating - electric heating plate heating method:

As long as the bearing is placed on a hot plate with a temperature of 100 ° C for a few minutes, this method is the most simple and convenient. If it is turned over several times, the bearing can be heated evenly and the efficiency is high. This method can be used regardless of the size of the bearing. heating.

2, bearing heating - electric furnace heating method:

The bearing is placed in a closed automatic temperature-controlled electric furnace for heating. This method is uniform in heating, accurate in temperature control, and fast in heating, and is suitable for a batch of bearings that heat a lot of bearings.

3, bearing heating - induction heating method:

This method utilizes an induction heater to quickly, reliably and cleanly heat the bearing to the desired temperature. This method is particularly suitable for applications where the inner ring is tightly fitted and because the inner ring is heated and the outer ring is heated. Very small, so that it can be easily mounted on the shaft and easily inserted into the seat hole.

4, bearing heating - bulb heating method:

This method uses a 50W bulb to heat the bearing to ensure that the heating temperature is around 100 °C. For smaller bearings, it can be placed directly on the bulb, and larger bearings can be placed in the cone of the bulb. The hood prevents heat loss from the bulb and makes the heating very uniform. The cone cover can also be adjusted up and down, and can be adapted to heat bearings of different sizes within a certain range. If you are using a far-infrared bulb, be aware that the direction of the bulb should be down to avoid infrared rays from damaging the human eye. This kind of bulb can save energy. The heating method of the bulb is suitable for occasions where the number of bearings is small and the bearings are not often heated. In normal cases, the bulb can also be used for illumination, and no other equipment is required.

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