Patent ID: 8020267

Claim:
A precision roll turning lathe comprising: a bed; a headstock, mounted on the bed, the headstock being configured to rotate a cylindrical workpiece while holding one end of the cylindrical workpiece by means of a chuck, said headstock having an indexing axis (C axis) about which said headstock performs circumferential indexing of the cylindrical workpiece; a tail stock, mounted on the bed and disposed opposite the headstock, for rotatably supporting the other end of the cylindrical workpiece; a carriage including a saddle mounted on the bed movably in the longitudinal direction (Z-axis direction) of the cylindrical workpiece, and a table mounted on the saddle movably in a direction (X-axis direction) perpendicular to the longitudinal direction of the cylindrical workpiece; a tool swivel mounted on the table and having an indexing axis (B axis); a tool post mounted on the tool swivel and having a plurality of turning lathe cutting tools attached thereto that are adapted to produce transverse grooves in the cylindrical workpiece; and a fly cutter spindle device mounted to the tool post and having a spindle for rotating a fly cutter that is adapted to produce longitudinal grooves in the cylindrical workpiece.