Headstock for a universal milling and drilling machine

A universal milling and drilling machine headstock having a vertical front face, said headstock comprising:

• main drive means in said headstock,
• a horizontal spindle in said headstock extending through said front face;
• a first surface on said headstock facing upwardly at a 45.degree. angle from and above said front face, said first surface having a central opening therethrough with a first axis normal to said first surface;
• a swivel head rotatably mounted to said headstock and having a second surface in confronting juxtaposition with said first surface, said swivel head being rotatable between a first position and a second position;
• a hollow cylindrical extension mounted to said swivel head and extending into said headstock through said opening coaxial with said first axis, said swivel head being rotatable about said first axis;
• clamping means coupled to said headstock and surrounding said cylindrical extension, said clamping means comprising at least two annular segments shaped and configured to engage a mating surface on said cylindrical extension to selectively prevent rotation of said swivel head with respect to said headstock;
• a vertical milling head mounted on said swivel head so that when said swivel head is in said first position, said vertical milling head is vertically adjacent said front face of said headstock, and when said swivel head is in said second position said front face is free of said vertical milling head;
• horizontal drive shaft means connected to said horizontal spindle;
• vertical drive shaft means comprising a first part mounted in said headstock parallel to said horizontal spindle and a second part mounted in said swivel head, said first and second parts being connectable when said swivel head is in said first position;
• and
• means for selectively coupling said main drive means to said horizontal and said vertical drive shaft means.