SKF - 71912 ACD/P4AQBCB

Details

These sets of four matched super-precision angular contact ball bearings are available as universally matchable bearings or in preconfigured arrangements. Sets of four bearings arranged in tandem need to be mounted against a single bearing, or a set of bearings in tandem, to achieve the desired preload. All the other arrangements are available in different preload classes and correct mounting results in preload within a predetermined range, without the need for shims or similar devices. The bore and outside diameters of the bearings are matched to within a maximum of one-third of the permitted diameter tolerance, to provide better load distribution than single universally matchable bearings. Material: High-quality carbon chromium bearing steel for rings and balls, with a lightweight, high-performance fiber-reinforced phenolic resin cage. Features are: Very High Running Accuracy, High Axial and Radial Stiffness, High Load Carrying Capacity, Optimized Power Density. Application: Heavy-Duty Machining & Tooling, High-Precision Industrial Equipment, Semiconductor Wafer Handling, Optical Tracking Systems, Advanced Engineering & Robotics, Power Generation, Precision Ball Screw Supports. ACD= 25° Contact Angle, P4A= Dimensional Accuracy In Accordance With ISO Tolerance Class 4, Running Accuracy Better Than ISO Tolerance Class 4, QBCB= Four Matched Single Row Deep Groove Or Angular Contact Ball Bearings Arranged Tandem - Back-To-Back, Medium Preload.

Specifications