2H6490 MINIMUM INTERNAL DIAMETER BEARING 75mm for Caterpillar Parts 2H 6490 Mental Health Communications Toolkit: October University Counseling. 2H6490 Outer Diameter Inner Race Cylindrical Roller Bearing VXB Bearing 2H6490 Cylindrical Roller Bearing Outer Race refers to a customized or unique design of the inner race of a roller bearing. The inner race is the ring shaped component that holds the rolling elements (such as rollers or balls) in place and allows for their rotational movement within the bearing assembly. 2H6490 Quantity: One Outer Race Brand: VXB Bearing