This spherical roller bearing (23960-B-MB-C3) has a bore of 300.0 mm, an outside diameter of 420.0 mm, and a width of 90.0 mm, with a net mass of 38.96 kg. The design features a symmetric three-rib inner ring layout (design B) paired with an MB cage, giving the assembly stable roller guidance under load. Radial internal clearance is in the C3 (Group 3) range, which is wider than normal clearance. Limiting speed is rated at 1780 1/min, with a reference speed of 1000 1/min. The two rows of symmetric rollers allow the bearing to accommodate shaft misalignment and combined radial and axial loads. The C3 clearance compensates for the temperature rise and interference fit typical of tight-fit mounting, keeping operating clearance within the intended working range after installation. The machined brass MB cage supports higher speeds and reduces cage wear compared to pressed steel designs. Relubrication is standard, so the bearing can be maintained with grease through regular intervals without disassembly.