Abstract: A pad driver for use with a floor maintenance machine that includes a riser portion and a driver disc portion that defines a driving surface which is engageable with a floor maintenance pad. The riser includes a radial flange which extends outwardly from a central hub. The radial flange includes a rim portion supported radially outwardly from the hub by a plurality of spoke-like regions. Regions of reduced material thickness separate the spoke-like regions. The hub is generally cup-shaped and includes a planar upper disc portion and a stepped, transition portion that joins the upper disc portion with the radial extending flange. A plurality of radially extending, rigidizing axial ribs extend between the underside of the upper disc portion and the inside of the stepped transition portion. The driver disc portion may comprise a separate driver disc attached to the riser or alternately, comprise a plurality of driving elements molded into the radial flange.