Feeder for machine tool

A feeder for a machine tool adapted to move a saddle relative to a machine base in a first axial direction by means of a first motor and to move a table relative to the saddle in a second axial direction perpendicular to the first axial direction by means of a second motor, the feeder comprising:

• a first ball thread nut fixed to the saddle;
• a first ball thread shaft that engages with the first ball thread nut in a rotatable manner but is immovable in the first axial direction relative to the machine base;
• a second ball thread nut fixed to the saddle;
• and
• a second ball thread shaft that engages with the second ball thread nut in a rotatable manner but is immovable in the second axial direction relative to the table, wherein
• the first ball thread shaft is coupled to the first motor,
• the first motor is fixed to the machine base,
• the second ball thread shaft is coupled to the second motor,
• the second motor is fixed to the table,
• the feeder further comprises:
• rails fixed to the table on its surface where the second motor is fixed;
• and
• bearings that are fixed to the saddle and bear the rails, and
• a sum of a movable distance of the table relative to the saddle and a length of the saddle in the second axial direction is shorter than a length of the table in the second axial direction.