FAG / Barden Super Precision Angular Contact Bearings

FAG and Barden super precision angular contact ball bearings are single row spindle bearings designed for high-speed, high-accuracy applications. Manufactured to extremely tight tolerances, they provide high running accuracy, rigidity, and reliable performance under combined radial and axial loads.

Key Features

• Super precision accuracy (P4S or higher)
• High speed capability and low friction operation
• High rigidity for spindle applications
• Optimised internal geometry, materials, and lubrication
• Available in multiple configurations, preload classes, and arrangements

Designation System Overview

FAG super precision bearings use a structured designation system to define geometry, accuracy, preload, and arrangement. A typical example is:

B7007-C-T-P4S-UL

• B7007 – Bearing series and bore size
• C / E – Contact angle
• T / TX / TPA – Cage design
• P4S – Super precision tolerance class
• U / UL / UM / UH – Universal matching and preload class

Contact Angles

• C – 15° contact angle (optimised for high speed)
• E – 25° contact angle (higher axial load capacity)

Preload Classes

• UL – Light preload
• UM – Medium preload
• UH – High preload

Bearing Configurations

• U – Single universal bearing (can be paired as required)
• DU / TU / QU – Universal sets (2, 3, or 4 bearings)
• DB – Back-to-back arrangement
• DF – Face-to-face arrangement
• DT – Tandem arrangement

Design Variants

• B – Standard steel ball design
• HCB / HC – Hybrid design with ceramic balls
• HS / HSS – High speed variants (including sealed options)
• XCB / XC – Cronidur high performance designs

Specifications

• Type: Angular Contact Ball Bearing
• Design: Single row, super precision spindle bearing
• Accuracy: P4S (higher than DIN P4)
• Brands: FAG / Barden

Applications

Suitable for machine tool spindles, high-speed motors, precision equipment, and applications requiring high accuracy, rigidity, and controlled preload.