A sprocket wheel, which is a machine component configured to slide relative to a bushing while being in contact with the bushing in an outer peripheral surface, includes a base made of a first metal, and an overlay that covers the base so as to constitute the outer peripheral surface. The surface of the overlay constituting the outer peripheral surface has been smoothed. Such a smoothed surface of the overlay makes the sprocket wheel less damaging to the bushing.

A sprocket wheel, which is a machine component configured to slide relative to a bushing while being in contact with the bushing in an outer peripheral surface, includes a base made of a first metal, and an overlay that covers the base so as to constitute the outer peripheral surface. The surface of the overlay constituting the outer peripheral surface has been smoothed. Such a smoothed surface of the overlay makes the sprocket wheel less damaging to the bushing.

A method for manufacturing a machine component includes forming a non-linear break notch in a workpiece, freezing the workpiece, and snapping the frozen workpiece apart along the non-linear break notch.

A method for manufacturing a machine component includes forming a non-linear break notch in a workpiece, freezing the workpiece, and snapping the frozen workpiece apart along the non-linear break notch.

A bushing assembly for a track assembly includes a first end element, a second end element, and a central element positioned between the first end element and the second end element. The central element may be interference fit or positioned between the first end element and the second end element, and the central element may include a greater hardness than the first and second end elements. The first end element, the second end element, and the central element form a bushing with a longitudinal opening extending longitudinally through the bushing.

A bushing assembly for a track assembly includes a first end element, a second end element, and a central element positioned between the first end element and the second end element. The central element may be interference fit or positioned between the first end element and the second end element, and the central element may include a greater hardness than the first and second end elements. The first end element, the second end element, and the central element form a bushing with a longitudinal opening extending longitudinally through the bushing.

A track link includes a tread surface, a shoe surface, a communicating part, and a seat formation part. The tread surface comes into contact with a roller for an undercarriage. The shoe surface is disposed on an opposite side from the tread surface. A track shoe is attachable to the shoe surface. The communicating part is disposed between the shoe and tread surfaces. The communicating part passes through the track link in a width direction that is perpendicular to a linking direction, and allows side faces of the track link to communicate in the width direction. The seat formation part is formed on a shoe surface side of the communicating part. A through-hole passes through from the shoe surface to the seat formation part, and a bolt member is disposable in the through-hole. A number track links in a loop are usable in a track of a work vehicle.

A track link includes a tread surface, a shoe surface, a communicating part, and a seat formation part. The tread surface comes into contact with a roller for an undercarriage. The shoe surface is disposed on an opposite side from the tread surface. A track shoe is attachable to the shoe surface. The communicating part is disposed between the shoe and tread surfaces. The communicating part passes through the track link in a width direction that is perpendicular to a linking direction, and allows side faces of the track link to communicate in the width direction. The seat formation part is formed on a shoe surface side of the communicating part. A through-hole passes through from the shoe surface to the seat formation part, and a bolt member is disposable in the through-hole. A number track links in a loop are usable in a track of a work vehicle.

A track link includes a tread surface, a shoe surface, a communicating part, and a seat formation part. The tread surface comes into contact with a roller for an undercarriage. The shoe surface is disposed on an opposite side from the tread surface. A track shoe is attachable to the shoe surface. The communicating part is disposed between the shoe and tread surfaces. The communicating part passes through the track link in a width direction that is perpendicular to a linking direction, and allows side faces of the track link to communicate in the width direction. The seat formation part is formed on a shoe surface side of the communicating part. A through-hole passes through from the shoe surface to the seat formation part, and a bolt member is disposable in the through-hole. A number track links in a loop are usable in a track of a work vehicle.

A track link includes a tread surface, a shoe surface, a communicating part, and a seat formation part. The tread surface comes into contact with a roller for an undercarriage. The shoe surface is disposed on an opposite side from the tread surface. A track shoe is attachable to the shoe surface. The communicating part is disposed between the shoe and tread surfaces. The communicating part passes through the track link in a width direction that is perpendicular to a linking direction, and allows side faces of the track link to communicate in the width direction. The seat formation part is formed on a shoe surface side of the communicating part. A through-hole passes through from the shoe surface to the seat formation part, and a bolt member is disposable in the through-hole. A number track links in a loop are usable in a track of a work vehicle.