Tappet assembly with unground outer cup

A tappet assembly movable within a bore along a longitudinal center axis of the bore, the tappet assembly comprising:

• an outer cup having an inner surface and an outer surface defining a substantially cylindrical body, an annular lip portion disposed at a first end of the outer cup, and an annular ledge disposed on the inner surface, the annular ledge extending perpendicular to the longitudinal center axis of the bore;
• an inner cup including an outwardly extending annular lip and first and second shaft apertures, the inner cup being disposed in the outer cup such that the annular lip of the inner cup abuts the annular ledge;
• a shaft having a first end and a second end disposed in the first and second shaft apertures, respectively;
• a roller follower rotatably received on the shaft such that a portion of the roller follower extends axially outwardly beyond the annular lip portion of the outer cup;
• and
• an anti-rotation feature formed in the outer cup,
• wherein the outer surface of the outer cup is an unground surface, and
• wherein the annular lip portion of the outer cup is deformed such that the annular lip of the inner cup is squeezed between the annular ledge and the annular lip portion of the outer cup so as to fix the inner cup to the outer cup.