The IGM-15NCIII is the latest innovation in advanced CNC I.D. Okamoto internal grinding technology. Designed with rigid construction and premium components, this machine guarantees sustained peak accuracy, and an extended operational lifespan, making it a vital asset in any precision-focused manufacturing setting. 


  • New Fanuc OiTD Control
  • Touch Screen functionality combined with conversational input software.
  • Rigid construction.
  • Versatile grinding capability – Straight, Taper, Faces & Multi-Step
    Grind I.Ds, O.Ds and Faces in a single chucking.
  • AC driven table with minimum feed increments of 0.00001″.
  • Minimum infeed increments as fine as 0.00001″ diameter.
  • High-performance wheelhead with 3 programmable speeds.
  • Rigid workhead with 100 to 850rpm speed.
  • Interrupt function enable in-process dressing in auto grinding cycle.

IGM-15NCIII Specifications

  • Internal Diameter to be Ground: 0.24″ ~ 6″/8″
  • Maximum Grinding Stroke: 5″
  • Swing over table: 24″
  • Workhead Spindle Speed: 100 ~ 850 rpm
  • Grinding Spindle: 5 hp
  • Floor Space (W x D x H): 100″ x 89″ x 67″
  • Weight: 5,072 lbs


The Okamoto IGM-15NCIII is equipped with a new touch screen CNC system to combine powerful control capabilities, allowing operators to effortlessly navigate and adjust settings to ensure optimal performance across a wide range of grinding applications. The IGM-15NCIII excels in versatile grinding, offering the ability to precisely grind straight, taper, and multi-step I.D.s, O.D.s, and faces in a single chucking. This eliminates the need for multiple setups and re-chuckings, reducing cycle times and enhancing overall productivity. With this internal grinding machine’s robust design, cutting-edge control technology, and versatile grinding capabilities, it’s ideal for multiple applications. Especially the automotive, aerospace, or any other industry requiring precise internal dimensions and surface quality.
Standard Accessories
  • Fanuc Oi-Td Control
  • Oil Mist Unit
  • Door Interlock
  • Dress Coolant Unit
  • 2-Point Swing Type Dresser with Diamond Tool
  • Front Sliding Splashguard
  • Wheel Spindle Speed Meters
  • Wheel Spindle Load Meters
  • Work Spindle Inverter
  • Wheel Spindle Inverter
  • Workhead Speed Meter
  • Leveling Bolts & Pads
  • Necessary Tools & Tool Box
  • Work Light
Optional Accessories
  • Coolant Systems with Paper Filter, with Paper Filter & Magnetic Separator
  • Spindles 10,000/15,000/20,000/30,000/40,000/60,000 available
  • Single Point Form Dresser with Diamond Tool
  • Radius Dresser
  • Rotary Dresser
  • Power Chuck
  • Collet Chuck
  • Specialty Chucks (contact Okamoto for types & models)
  • Run Light

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