Structural frame for a machine tool

A structural frame for a machine tool, the machine tool including a tool holder and a workpiece holder for holding a workpiece as the workpiece is machined by a cutting tool held in the tool holder, said frame comprising:

• a base including a first fastener hole pattern;
• and
• a bed for supporting a tool holder and a workpiece holder as the tool holder and the workpiece holder cooperate to machine a workpiece, the bed including a second fastener hole pattern that is alignable with the first fastener hole pattern to mount the bed on the base selectively in each of
• a first operative position where a tool holder and a workpiece holder are supported by the bed at a first angular orientation relative to the base as the tool holder and workpiece holder cooperate to machine a workpiece, and
• a second operative position where a tool holder and a workpiece holder are supported by the bed at a second angular orientation relative to the base as the tool holder and the workpiece holder cooperate to machine a workpiece.

A process for manufacturing a structural frame for a machine tool, the machine tool including a tool holder and a workpiece holder for holding a workpiece as the workpiece is machined by a cutting tool held in the tool holder, said process comprising the steps of:

• forming a base having a first fastener hole pattern;
• forming a bed having structure for supporting a tool holder and a workpiece holder as the tool holder and the workpiece holder cooperate to machine a workpiece;
• forming a second fastener hole pattern on the bed that is alignable with the first fastener hole pattern selectively in each of
• a first operative position where a tool holder and a workpiece holder are supported by the bed at a first angular orientation relative to the base as the tool holder and workpiece holder cooperate to machine a workpiece, and
• a second operative position where a tool holder and a workpiece holder are supported by the bed at a second angular orientation relative to the base as the tool holder and the workpiece holder cooperate to machine a workpiece;
• aligning the first and second fastener hole patterns in one of the first and second positions;
• and
• fastening the bed to the base in the one of the first and second positions using the fastener hole patterns.