Use structure to compare specific PDC configurations. The parts to identify are the body, cutting profile, blades or crown, cutter positions, flushing paths and connection. The PDC introduction explains the term; this page focuses on what to inspect in a drawing or photograph.
Face profile and core passage
A solid or full-hole cutting face serves a non-coring task. An annular crown has a central opening for a sample. A stepped or enlarged outer profile can belong to a reaming configuration. Identify the task before comparing individual cutters.
Blades and cutter placement
Compare the number and shape of blades, cutter positions on the face and gauge, and space for cuttings. Different layouts can share the same wing count. A cutter count does not by itself specify the body dimensions, connection or ground suitability.
Flushing and the connection
Identify channels and ports, then review them with the intended flushing arrangement. At the rear, check the thread, shoulder and mating component. These interfaces must be established from the chosen drawing rather than inferred from a similar-looking bit.
Compare actual configurations
Spiral PDC core bits show an annular layout. Integral reaming heads show staged cutting zones, and unassembled bodies and cutter holders show components before a complete cutting assembly is specified. Read how cutter engagement works or browse PDC products.
Illustrations
