FAG B7021-E-T-P4S-UM

FAG B7021-E-T-P4S-UM Super Precision Spindle Bearing Description This FAG B7021-E-T-P4S-UM is a single-row angular contact ball bearing designed for high-precision applications such as machine tool spindles. With a 25-degree contact angle and P4S tolerance class, it provides high rigidity and running accuracy for combined radial and axial loads. The universal matching design allows for flexible mounting arrangements. Made in Germany, this bearing represents the highest standards in quality and performance. Specifications Manufacturer: FAG Part Number: B7021-E-T-P4S-UM Type: Spindle Bearing / Angular Contact Ball Bearing Bore Diameter: 105 mm Outside Diameter: 160 mm Width: 29 mm Contact Angle: 25 degrees Cage: Textolite (laminated phenolic resin) Precision Class: P4S (DIN 620), equivalent to ABEC 7 Arrangement: Universal matching, single bearing Label Info Model: B7021-E-T-P4S-UM EAN: 4012801752022 Application Primarily used in the main spindles of high-speed milling machines, lathes, grinding machines, and other precision rotating equipment where rigidity and accuracy are critical. Country of Origin Made in Germany. CO2 Impact Opting for this component avoids the production of a new one, saving an estimated 4.2 kg of CO2. This is comparable to the emissions from a 21-kilometer car journey. Availability This item is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ What does the ‘UM’ suffix in B7021-E-T-P4S-UM signify?The ‘UM’ stands for Universal Matching. This means the bearing is manufactured to such tight tolerances that it can be mounted in any arrangement (back-to-back, face-to-face, or tandem) with another ‘UM’ bearing without requiring specific pairing at the factory. This provides great flexibility for machine designers. What is the recommended preload and lubrication for a bearing with P4S precision?The optimal preload depends heavily on the specific application’s speed, load, and desired stiffness. It should be calculated by a qualified engineer. For lubrication, high-speed grease or an oil-air lubrication system is typically required for spindle bearings of this precision class to manage heat and ensure long life. Always consult the FAG mounting and maintenance guide for specifics. Is the textolite cage (T-suffix) suitable for all operating environments?The textolite (phenolic resin) cage offers excellent high-speed performance and low friction. However, it has an upper operating temperature limit, typically around 100-120 deg C. It’s also not suitable for applications in a vacuum or with certain aggressive chemicals. For extreme temperature or chemical environments, a bearing with a different cage material may be necessary. 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. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder.