Sewing machine frame with presser foot and needle bar unit

A sewing machine including a body having an open rear portion, an arm, precast seats in the body, a presser foot and needle bar unit, a thread tension device and a top shaft unit, means fastening said unit and device in said seats in the body, the presser foot and needle bar unit being provided with a presser foot mechanism and a needle bar holder, and being defined by an elongated frame having ends, points of attachment at both ends, said points of attachment comprising means providing a range of adjustment for setting of the position of the presser foot and needle bar unit in the arm in at least one direction at a right angle to the longitudinal direction of the elongated frame.