1. Product Overview 85TAC20X+L is high-precision bidirectional thrust angular contact ball bearing with 60° large contact angle, standard dimension 85×130×54mm. X stands for optimized internal ball layout for higher axial rigidity; suffix L means matched spacer ring for direct preload assembly without extra adjustment parts. Double-row steel ball structure bears heavy bidirectional axial load, ultra-low thermal rise and stable high-speed rotation. Open structure allows