A plate-like material is pressed and a middle concave portion centered on
a center axis is formed in one axial surface of the material. Likely, an
annular concave portion centered on a center axis and radially outwardly
arranged is formed in one and/or the other axial surface of the material.
The material is then cut along a radially outer rim of the middle concave
portion, and between a radially outer rim and a radially inner rim of the
annular concave portion. In this way, a thrust plate having indented
portions at radially inside and outside portion of the one and/or the
other axial surface thereof is manufactured. A burr formed in press
working is accommodate within the indented portion and does not axially
protrude from the one and/or the other axial surface of the thrust plate.