A Spherical Roller Bearing has round rollers and a curved outer ring so it can deal with slight misalignment. We use it where parts might tilt or wobble. The rollers adjust themselves and carry heavy weight without seizing up. Made of tough steel, it lasts long even under rough conditions. We grease it often and watch for vibration. If it hums or heats up, we replace it. It’s like a flexible friend that keeps things turning even when the ride gets bumpy.