Cam follower roller device, notably for a fuel injection pump

A method of manufacturing a cam follower roller device, the method comprising steps of:

• obtaining a tappet body, the tappet body extending along a longitudinal axis, a tappet bore being formed along the longitudinal axis within the tappet body;
• mounting a bearing assembly within the tappet bore, the bearing assembly comprising a pin centered on a pin transverse axis being perpendicular to the longitudinal axis, and a roller rotatably mounted on the pin,
• fabricating the tappet body by a metal injection molding process including successive steps of:
• mixing a metal powder with a thermoplastic binder,
• forming a part by injection of the mixed powder in a closed die,
• debinding such a formed part in a furnace,
• sintering to densify the part, and
• quenching to set a tappet body hardness, to improve wear resistance and fatigue life.