This stud type track roller is built as a double row self-retaining angular contact ball bearing with a particularly thick-walled outer ring, ball and cage assembly, and no eccentric collar. It is mounted on a solid, long roller stud with external thread; axial guidance of the outer ring is provided directly by the balls. Outside diameter is 40.0 mm, width 53.2 mm, net mass 0.19 kg. Sealing is realized by a lip seal on both sides (2RS) giving axial sealing action, which keeps contaminants out without a separate relubrication facility, so the bearing runs sealed-for-life. An assembly aid in the form of a hexagonal socket is provided only on the flange side end face, simplifying stud installation and tightening. The design suits applications where the outer ring must run directly on a track surface under stud mounting.