Railway coupler core structure for increased strength and fatigue life of resulting knuckle

A core for forming the rear part of a knuckle for a railcar, said core comprising a kidney core section and a pivot pin core section, the kidney core section having maximized interior fillets and reduced buffing shoulder portions.

A set of cores for forming an knuckle for a railcar coupler that has increased strength and/or fatigue life, said set of cores comprising:

• a finger core for forming the front part of a knuckle for a railcar, said finger core comprising a single opening to form a single rib in the resulting knuckle;
• and a core for forming the rear part of a knuckle for a railcar, said core comprising a kidney core section and a pivot pin core section;
• the kidney core section having maximized interior fillets and reduced buffing shoulder portions.

A railway coupler knuckle with increased strength and fatigue life, said knuckle comprising a single thick rib in said knuckle.