SKF 71911ACD/P4A

SKF 71911 ACD/P4A Super-precision Angular Contact Ball Bearing Description The SKF 71911 ACD/P4A is a single-row super-precision angular contact ball bearing designed for applications requiring high rigidity and rotational accuracy at high speeds. With its 25-degree contact angle, it is optimized to accommodate combined radial and axial loads. This bearing is an excellent choice for machine tool spindles and other precision machinery. Specifications Bore Diameter: 55 mm Outside Diameter: 80 mm Width: 13 mm Contact Angle: 25 degrees Precision Class: P4A (equivalent to ABEC 7) Arrangement: Universal matching for use in sets Material: High-grade bearing steel Label Info Brand: SKF Model: 71911 ACD/P4A EAN: 7316570084280 Application This bearing is primarily used in high-speed, high-precision applications such as milling machines, lathes, grinding machines, high-speed pumps, and robotics where accuracy and reliability are critical. Country of Origin Made in Italy. CO2 Impact By purchasing this pre-owned but unused bearing, you contribute to a circular economy and avoid the emission of approximately 0.46 kg of CO2 associated with the production of a new one. This saving is comparable to charging a modern smartphone 55 times. Availability This item is new in its original, factory-sealed packaging. It is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ Question?What does the ACD/P4A suffix mean for this SKF bearing? The suffix breaks down as follows: ‘AC’ indicates a 25-degree contact angle. ‘D’ refers to SKF’s optimized internal design. ‘P4A’ signifies a very high precision tolerance class (ISO Class 4 / ABEC 7), ensuring exceptional dimensional and running accuracy. Question?What are the best practices for handling and mounting a super-precision bearing like this? Always handle this bearing in a clean, dust-free environment. Do not unwrap it until immediately before mounting. Use appropriate tools, like induction heaters for controlled heating, and ensure the shaft and housing meet the required dimensional and geometric tolerances to prevent premature failure. Question?Can this bearing be used with any type of lubrication? No, super-precision bearings require specific lubrication. For high-speed applications, a filtered, high-quality grease or an oil-air lubrication system is typically recommended. The choice depends on the operational speed (nDm value), load, and temperature. Always consult the SKF technical manual for the correct lubricant type and quantity. Last Update: Friday, March 13, 2026 profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.