Kennametal NSR-163D Tool Holder

The Kennametal NSR-163D is a right-hand, 1 in × 1 in square shank indexable threading and grooving tool holder designed to accept N.3R inserts in CNC and manual turning. It measures 6.0 in overall length (shank 4.75 in, head 1.25 in) and uses a clamp-style insert retention with no coolant-through capability, supporting threading, grooving, facing, chamfering, and profiling operations. Built from hardened tool steel and weighing about 1.59 lb, the NSR-163D is compatible with Kennametal Top Notch inserts and is commonly installed in engine lathes, CNC turning centers, and production machining equipment for precision turning on steel, stainless steel, cast iron, aluminum, and hardened materials.