50BNR10STDUELP4Y Super Precision High Speed Angular Contact Duplex

The 50BNR10STDUELP4Y is a super-precision angular contact ball bearing from NSK's ROBUST series, featuring a 50 mm bore, 80 mm outside diameter, and 18° contact angle. This duplex universal set consists of two flush-ground bearings with extra light preload, manufactured to ISO Class 4 (ABEC 7) precision with special set-matching tolerances. The bearings use SUJ2 bearing steel construction with phenolic resin cages and open design.

Super-precision angular contact bearings in duplex arrangements are designed for high-speed applications requiring precise radial and axial guidance. Common applications include machine tool spindles, precision grinders, coordinate measuring machines, and high-performance industrial equipment where rigidity, accuracy, and high-speed capability are critical.