70BNR10STDUELP4Y Super Precision High Speed Angular Contact Duplex

The 70BNR10STDUELP4Y is a super-precision angular contact ball bearing from NSK's ROBUST series, featuring a 70mm bore, 110mm outside diameter, and 18° contact angle. This duplex universal set includes two bearings flush ground to 40mm total width with extra light preload, precision ground to ISO Class 4 (ABEC 7) tolerances. The bearings use SUJ2 bearing steel with phenolic resin cages and open enclosure design.

Super-precision angular contact bearings in duplex universal arrangement are designed for high-speed machine tool spindles, precision grinding equipment, and other applications requiring rigid shaft support with minimal runout. The universal set configuration allows flexible mounting in back-to-back, face-to-face, or tandem arrangements to optimize radial and axial load capacity based on application requirements.