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What are the specific reasons for natural wear of cylindrical roller bearings

Edit:Shandong Yunhua Bearing Co., Ltd. Time:2023-06-12

The specific reasons for natural wear of bearings are mainly as follows: the small peaks and valleys on their friction surface squeeze each other, causing the brittle surface to gradually fall off and wear.

Oxidative wear: The small peaks and valleys on the surface of cylindrical roller bearings in relative motion combine with oxidation in the air to form brittle oxides that are not firmly bonded to the base metal. This oxide is easily detached during friction, and the wear that occurs is called oxidative wear.

Friction induced heat wear When bearings work under high speed, heavy load, and poor lubrication, high temperatures are generated at the peak and valley of the surface due to friction, resulting in a decrease in contact hardness and wear resistance, and even adhesion and tearing. This type of wear is called friction induced heat wear.

Hard particle wear: If the bearing undergoes relative motion. The movement surface of the bearing is uneven in organization, with hard particles present, or impurities such as sand, debris, and chips falling between the movement surfaces of the bearing. During relative movement of the bearing, hard particles or impurities can scratch or even form grooves on the surface of the bearing, which is called hard particle wear. Automobile bearings

Pitting wear: The rolling contact surface of gears, bearings, and other components is periodically subjected to high contact pressure during the process. Over time, fatigue occurs on the metal surface, causing small cracks and erosion on the bearing surface. This type of wear is called pitting wear.

Causing rust or corrosion, wear caused by chemical corrosion. The outer surface of bearings is corroded by acids, alkalis, saline liquids or harmful gases, accelerating the wear process. This type of wear is called chemical corrosion caused wear.

The change in the metallographic structure or chemical composition of the metal reduces the wear resistance and hardness of the bearing surface, accelerating the wear process. This type of wear is called wear caused by high-temperature action, and wear caused by high-temperature action. When the bearing is temporarily operating at high temperatures. Due to temporary contact with liquids or harmful gases such as water, acid, alkali, salt, etc., corrosion damages non moving bearings on equipment, causing rust or damage due to corrosion, which is called corrosion damage.