LQ15V00007S077 BA246-2SA Excavator Single Row Roller Bearing 246x313x32mm Single Row Angular-contact Ball Bearing Describe: A roller bearing is a type of rolling-element bearing that uses cylindrical, tapered, needle, or barrel-shaped rollers to reduce friction between moving parts. Unlike ball bearings that have point contact, roller bearings have line contact, which allows them to support heavier loads and have greater rigidity. They are used in various applications,