A/B Series Small Hole Tooling Available in steel and carbide shanks, the WIDIA™ line of micro boring bars is an excellent, economical choice for a wide range of applications — from creating small holes in small parts to precision micro boring typically found in large workpieces — manufactured in the aerospace, heavy equipment, and automotive industries. A/B Series A/B Series Micro Boring Bar Features ABD Type • 1,56–3,96mm diameter boring range. Replaceable boring insert with coolant slot. • Unique locking system enables quick, accurate insert changes. • Insert repeatability guaranteed within ±0,013mm. Benefits ABD Type • Quick, accurate insert setups. • Available in multiple styles for machining a wide Replaceable boring insert available in coated and range of materials. uncoated carbide, CBN, and PCD tip. A series has • Elliptical, ground insert shanks for maximum a coolant slot. strength and rigidity. BB Type Replaceable boring insert. D60 widia.com