German MDL bearings, MDL models, MDL prices

MDL bearings are bearings that operate under sliding friction. Plain bearings operate smoothly, reliably, and without noise. Under liquid lubrication conditions, the sliding surfaces are separated by lubricating oil without direct contact, which can greatly reduce friction loss and surface wear; the oil film also has a certain vibration absorption capacity. However, the starting friction resistance is relatively high. The part of the shaft supported by the bearing is called the journal, and the part mating with the journal is called the bearing bush. The anti-friction material layer cast on the inner surface of the bearing bush to improve its friction properties is called the bearing lining. The materials of the bearing bush and bearing lining are collectively referred to as plain bearing materials. Plain bearings are generally applied in high-speed and light-load operating conditions.

MDL bearing applications

Single-row angular contact ball bearings: machine tool spindles, high-frequency motors, gas turbines, centrifugal separators, front wheels of small cars, differential pinion shafts, booster pumps, drilling platforms, food machinery, indexing heads, surfacing welders, low-noise cooling towers, electromechanical equipment, painting equipment, machine tool slot boards, arc welders. Double-row angular contact ball bearings: oil pumps, Roots blowers, air compressors, various transmissions, fuel injection pumps, printing machinery, planetary gearboxes, extraction equipment, cycloidal gearboxes, food packaging machinery, electric welders, soldering irons, distribution boxes, gravity spray guns, wire stripping machines, half shafts, inspection and analysis equipment, fine chemical machinery.

MDL bearing lubrication

The purposes of rolling bearing lubrication are to reduce internal friction and wear of the bearing, prevent seizure; extend service life; dissipate frictional heat for cooling, prevent bearing overheating, and prevent aging of the lubricating oil itself; it also prevents foreign matter from entering the bearing interior, or prevents rust and corrosion. Bearing lubrication methods are divided into grease lubrication and oil lubrication. To ensure the bearing performs well, first, select a lubrication method suitable for the operating conditions and purpose. If only lubrication is considered, oil lubrication has superior lubricity. However, grease lubrication has the advantage of simplifying the structure around the bearing. Compare the pros and cons of grease lubrication and oil lubrication. Pay special attention to the amount during lubrication; whether using oil or grease, too little amount leads to insufficient lubrication affecting bearing life, while too much amount generates large resistance, affecting rotational speed.

MDL bearing maintenance

1) When the bearing has operated for a certain period (or during the maintenance interval), remove all bearings; 2) soak and clean the bearings with diesel or kerosene used for cleaning; if technical conditions permit, it is best to open the seal covers for cleaning; 3) after cleaning, allow the cleaning oil to air dry, and visually inspect for any damage; 4) use a wooden stick (preferably a hollow tube) approximately 150mm long, with a diameter equal to the inner diameter of the angular contact ball bearing, and fix one bearing at one end; 5) while manually rotating the bearing quickly, press the other end of the wooden stick (tube) against your ear or an audio amplifier microphone to listen for bearing rotation noise; 6) after fixing the bearing, move the wooden stick laterally to check for wear or looseness in the bearing; 7) FAG bearings with severe looseness, excessive rotation noise, or serious defects should be discarded and replaced with the same model; 8) take a bucket and melt an appropriate amount of lubricating grease (high-quality yellow dry oil) over a gentle flame (do not overheat), place the inspected bearings into the bucket and soak until no bubbles emerge. Remove the bearings before the grease cools to leave a small amount of residual grease. Remove the angular contact ball bearings after the grease cools to leave a larger amount of residual grease. Determine the amount of residual grease as needed. 9) Wipe the grease off the outside of the bearing with a soft cloth or toilet paper, and assemble the FAG bearing back onto the pulley in its original state; the maintenance work is then complete.

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