First, pay attention to cleaning angular contact ball bearings

In order to prevent dust and rust during transportation and storage, the surface of the angular contact ball bearing is coated with anti-rust oil when the product is shipped. After unpacking, the anti-rust oil should be cleaned first. The cleaning method is as follows:
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1. Angular contact ball bearings generally use kerosene or gasoline as a cleaning fluid.
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2. Separate the cleaning tank according to rough cleaning and fine cleaning, and put metal mesh on the bottom of the tank respectively, so that the angular contact ball bearing does not directly contact the stolen goods in the cleaning tank.
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3. In the rough washing tank, try to avoid rotating the bearing, and use a brush to roughly remove the swag attached to the surface of the angular contact ball bearing, and then put it in the fine washing tank.
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4. In the fine washing tank, gently rotate the bearing for cleaning, and the cleaning oil in the fine washing tank must be kept clean frequently.
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5. After cleaning, degreasing, and if it is grease lubrication, the process of filling grease. If it is oil-air lubrication, try to install the angular contact ball bearing on the main shaft when the angular contact ball bearing does not rotate. (At this time, it is better to apply a thin layer of lubricating oil on the bearing surface and inside.)

Second, pay attention to check the shaft and bearing seat
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1. The shaft and bearing seat should be cleaned, and the surface of angular contact ball bearing and spacer is not allowed to have scars, burrs, burrs, etc.
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2. Check the dimensions of the shaft and the bearing seat to confirm whether it conforms to the tolerance fit with the inner and outer diameters of the angular contact ball bearing.
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3. Measurement (including installation) should be carried out in a constant temperature room. When the temperature of the measured object is in a stable state, use a micrometer or an inner diameter dial gauge to measure. (Multiple measurements must be taken to check for obvious size differences.)

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Third, pay attention to the installation sequence of angular contact ball bearings
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There are various types of angular contact ball bearings, and more attention should be paid to the installation sequence. Due to structural reasons, a single bearing can bear the load in one direction. Therefore, it is very important to install to the shaft and housing that the external load is only applied to the loadable side and not the other side. When combining angular contact ball bearings, for back-to-back and face-to-face combinations, the order in which they are loaded into the shaft and housing is different. Be sure to pay attention to:
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1. Back-to-back combination
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Install the angular contact ball bearing on the shaft → tighten the shaft nut and apply preload → install the shaft and bearing into the bearing seat and fix it with the front cover.
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2. Face to face combination
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Install the angular contact ball bearing into the bearing housing → tighten the front cover and apply preload → install the angular contact ball bearing into the bearing inner ring and tighten the nut.