Horizontal Lathe Machine With a Mid-Spindle and Two Tooling Turrets

A horizontal lathe machine comprising:

• a machine base having an upper surface and a pair of guide rails which are disposed on said upper surface and extend in an X-direction, said upper surface being bordered by a first side, a second side opposite to said first side in the X-direction, a front side, and a rear side opposite to said front side in a Y-direction that is perpendicular to the X-direction;
• a work spindle unit disposed on said machine base and proximate to said front side, and having a mounting seat which is securely mounted on said machine base, a bi-directional spindle chuck which is rotatably mounted on said mounting seat about a spindle axis in the X-direction, and which has two collet ends opposite to each other along the spindle axis, and a motor containing chuck driving member which is disposed on said machine base to drive rotation of said bi-directional spindle chuck about the spindle axis;
• a pair of tooling turret units movably disposed on said machine base in the X-direction and respectively proximate to said first and second sides, and located at two opposite sides of said work spindle unit in the X-direction, each of said tooling turret units including a saddle which movably rides on said guide rails, a turret which is rotatably mounted on said saddle about a turret axis in the Y-direction, and a motor containing turret driving member which is mounted on said saddle to drive rotation of said turret about the turret axis;
• and
• a pair of motor containing X-direction driving units, each located between said machine base and a respective one of said tooling turret units and disposed to drive a movement of the respective one of said tooling turret units in the X-direction relative to said machine base.