NTK SS tools for boring include small bore tools with a minimum machining diameter of 5mm, boring tools which enable machining from the back of the inner diameter, tools for inner grooving, and this for threading. These utilise indexable inserted tools which meet a variety or requirements in the boring operations for small parts.

• Indexable insert boring bars for machining inner diameter of 10mm or less
  (minimum machining diameter: 1mm, 2mm, 3mm, 5mm, 6mm, 8mm, etc).
  
• Various extra hard shank that have excellent durability against chatter for machining of small internal diameter or large overhanging lengths are prepared.
  
• An indexable inserted boring bar is available for machining a step inside an internal bore.
  
• 75° and 80° rhombic inserts with high point strength and triangular inserts with three cutting edges are available.
  
• The insert material type is selected from micro grain carbides, ZM3 and KM3, which ensures both sharp cutting performance and toughness. Cermet material offers high speed cutting performance and excellent surface finishes.
  
• Two types of chipbreakers are available; a ground chipbreaker which ensures excellent cutting performance and a molded chipbreaker which offers a large area for cutting chip disposal. A chipbreaker with which chip control are discharged in the forward direction is
  also available.