Reverse countersink cutting assemblies, reverse countersinking assemblies and methods for reverse countersinking a through hole in a workpiece

A reverse countersinking assembly, comprising:

• a pull shank assembly defining a longitudinal axis extending from a shank distal end through a shank proximal end, the pull shank assembly comprising a shank distal portion, a shank extension portion and a shank proximal portion axially spaced along the longitudinal axis;
• and
• a reverse countersink cutting assembly at least temporarily attached to the pull shank assembly, the reverse countersink cutting assembly comprising:
• a countersink cutting head comprising a cutter distal end, a cutter distal portion, a cutting portion, a cutter proximal portion and a cutter proximal end axially spaced along the longitudinal axis, the cutting portion defining a countersink cutting range, the cutter distal end comprising a first central cavity that receives the shank proximal portion of the pull shank assembly;
• a depth stop sleeve comprising a second central cavity that receives the cutter proximal portion of the countersink cutting head and further comprising one or more projections that extend coaxially along the longitudinal axis to a predetermined point within the countersink cutting range to define a depth of cut for the reverse countersink cutting assembly;
• and
• a fastener that retains the depth stop sleeve on the countersink cutting head.

A method for reverse countersinking a through hole in a workpiece, the method comprising:

• retaining a depth stop sleeve on a countersink cutting head to form a reverse countersink cutting assembly that defines a depth of cut for a reverse countersink in a working surface of the workpiece encircling the through hole;
• at least temporarily attaching the reverse countersink cutting assembly on a working side of the workpiece to a pull shank assembly on an accessible side of the workpiece by way of the through hole to form a reverse countersinking assembly defining a longitudinal axis extending from an assembly distal end associated with the pull shank assembly to an assembly proximal end associated with the reverse countersink cutting assembly;
• and
• rotating the pull shank assembly and the countersink cutting head while pulling the pull shank assembly away from the accessible side of the workpiece to cut the reverse countersink in the working surface that encircles the through hole to the depth of cut defined by the reverse countersink cutting assembly.