Workpiece indexing and clamping system

An indexing and clamping pin for fastening to a baseplate and extending into a workpiece hole for locating a workpiece relative to a baseplate and clamping said workpiece to said base plate which comprises:

• a head at a distal end of said pin;
• a coaxial extension at a proximal end of said pin for fitting into a base plate hole;
• a base between said spherical head and said extension and secured thereto with a longitudinal axis through said head, extension and base;
• said head having a shape selected from spherical and cylindrical shapes;
• least two flats on said head;
• at least two spaced axial slots through said head;
• a threaded axial first hole through said head;
• said first hole tapered from a first diameter at the head distal end to a narrower diameter;
• a first setscrew in said first hole to expand said head as said first setscrew is threaded further into said first hole;
• a second threaded axial hole having a diameter less than that of said first hole and extending from said first hole through said extension;
• at least one axial slot in said extension distal end;
• said second hole tapered to a narrower diameter at said extension distal end;
• and
• a second setscrew in said second hole to expand said extension as said second setscrew is threaded further into said second hole.

A pin for indexing a workpiece relative to a base plate and for clamping said workpiece to said base plate, which comprises;

• a head at a distal end for fitting within a workpiece hole and a cylindrical extension at a proximal end for fitting into a base plate hole;
• said head having two opposed spaced pairs of contiguous flats around said head, whereby said head is generally diamond-shaped in plan view;
• first means for expanding said head into clamping engagement with a said workpiece hole;
• second means for expanding said extension into clamping engagement with a said base plate hole.