An infeed mechanism for a glass container inspection machine which will receive bottles on a linear conveyor and which has a support to which the infeed mechanism can be secured. The infeed mechanism has a timing cam and a frame is provided for supporting the timing cam at the bottom thereof which includes a first box like frame for rotatably supporting the timing cam at the bottom, a servo motor secured to and within the first box like frame, a vertically extending transmission supported by the first box like frame for transferring the output of the servo motor downwardly to the rotatable timing cam, a second frame, above the timing cam for supporting first frame for relative vertical displacement, and a mounting plate located vertically above the second frame for supporting the second frame for relative horizontal displacement transverse to the linear conveyor so that the infeed mechanism can be mounted by securing the mounting plate to a machine frame with the infeed mechanism above the linear conveyor.