Precision angular contact spindle bearing with a 25° contact angle, ceramic balls and a bore of 80.0 mm, outside diameter of 125.0 mm and width of 22.0 mm, mass 0.805 kg. Cage designation T, no sealing, restricted tolerances (P4S), supplied adjusted for universal mounting (UL) in pairs or sets, allowing flexible arrangement configurations. The 25° contact angle combined with ceramic balls gives high stiffness under combined axial and radial load while keeping centrifugal mass low at elevated speeds, which is the main reason for using ceramic balls in a spindle bearing of this size. The restricted P4S tolerances and matched pair/set supply support accurate shaft positioning and consistent preload across the arrangement. As the bearing has no seal, external sealing and a suitable lubrication system must be provided by the housing design; the open cage design (T) allows unrestricted lubricant flow through the bearing.