ISO 3552-2:1992

Overview

ISO 3552-2:1992 - Rotary core diamond drilling equipment, System B - Part 2: Inch units - is an international standard that establishes the nomenclature, leading dimensions and interchangeability limits for a range of rotary core drilling components in inch units. It covers drill rods and couplings, fishing rods, casing tubes and accessories, core barrels, core bits, core lifters and reaming shells for hole diameters from 1.42 in to 5.74 in, yielding core diameters of 0.87 in to 4.72 in. This part is the inch‑unit version of System B (metric values in ISO 3552-1 are the authoritative reference).

Key topics and technical requirements

• Scope and nomenclature: standardized designation system and reference numbers for components (see standard tables for designation codes and component relationships).
• Interchangeability: leading dimensions and mating-detail geometry to ensure parts from different manufacturers fit and work together within System B limits.
• Dimensional tolerances: specified tolerances for outside/inside diameters, thread forms (thread tables), and other critical sizes. Example limits include outside diameter tolerance of +0.008 in for diameters