German Nadella bearings Nadella models Nadella prices

Nadella bearings have raceways on both the inner and outer rings, and the inner and outer rings can move relative to each other along the bearing axis. This type of bearing is particularly suitable for withstanding combined loads, i.e., loads acting radially and axially at the same time. The axial load carrying capacity of angular contact ball bearings increases as the contact angle α increases. The contact angle is the angle between the line connecting the contact points of the ball and the raceway in the radial plane and the perpendicular to the bearing axis.

Nadella 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, repair welding machines, low-noise cooling towers, electromechanical equipment, painting equipment, machine tool slot plates, arc welding machines Double-row angular contact ball bearings: oil pumps, Roots blowers, air compressors, various transmissions, fuel injection pumps, printing machinery, planetary gearboxes, extraction equipment, cycloid gearboxes, food packaging machinery, electric welding machines, soldering irons, square boxes, gravity spray guns, wire stripping machines, half-shafts, inspection and analysis equipment, fine chemical machinery.

Nadella bearing lubrication

The purposes of rolling bearing lubrication include reducing internal friction and wear, preventing seizure; extending service life; dissipating frictional heat for cooling, preventing overheating, and preventing lubricant aging; 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 and oil lubrication. Pay special attention to the amount during lubrication; whether using oil or grease, too little leads to insufficient lubrication affecting bearing life, while too much generates significant resistance, affecting rotational speed.

Nadella 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 allow, it is best to open the seal covers for cleaning; 3) After cleaning, let the cleaning oil drain dry, and visually inspect for damage; 4) Use a wooden stick (preferably a hollow tube) about 150mm long, with a diameter equal to the inner diameter of the angular contact ball bearing, 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, laterally wiggle the wooden stick to check for wear or looseness; 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, melt an appropriate amount of lubricating grease (high-quality yellow dry oil) over a gentle flame (do not overheat), immerse the inspected bearings in the bucket until no bubbles emerge. Remove the bearings before the grease cools for minimal residual grease. Remove the angular contact ball bearings after the grease cools for more residual grease. Determine the amount of residual grease as needed. 9) Wipe the external grease off the bearings with a soft cloth or toilet paper, and assemble the FAG bearings back onto the pulley in their original state; the maintenance work is then complete.

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