The SKF BTW90CTN9SP is a genuine SKF double direction super precision angular contact ball bearing designed for high accuracy and rigidity. Featuring a bore diameter of 90 mm, an outer diameter of 140 mm, and a width of 58 mm, this bearing is equipped with a polyamide cage (CTN9) and manufactured to Super Precision (SP) class standards, ensuring optimal performance in demanding applications such as machine tool spindles.