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Internal gear grinding machine ZI20A


Mass Produces Internal Gears Precisely and Efficiently

Photograph of the internal gear grinding machine ZI20A

Internal gear grinding machine ZI20A

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Grinds Ring Gears After Heat Treatment to JIS Class N4 Quality

  • Generation grinding is performed utilizing high-speed, high-accuracy, synchronous rotation of the wheel/work spindles.
  • The barrel-shaped, multi-threaded grinding wheel improves the sliding velocity, achieving high-performance in modification of tooth flank as well as improved pitch accuracy.
  • The equipped dresser conducts high-accuracy dressing of the grinding wheel as mounted on the machine.

Longer Grinding Wheel Life, Lower Costs

The vitrified CBN grinding wheel contributes to:
  • Longer grinding wheel life
  • Reduction in grinding wheel cost

Automated Devices for High-Volume Production

  • Phase matching during setup changeover is automated.
  • A newly adopted non-contact sensor facilitates automation of phase matching process.
  • A high-speed work changer contributes to reduced time in workpiece changeover.

Machine Specification

Machine Specification
Item/Model ZI20A
Max. work piece diameter mm / in Φ200 / Φ7.9
Max. module   M3
Max. gear width mm / in Φ15-200 / Φ0.6-7.9
Grinding wheel head swivel angle deg ±40
Grinding wheel speed min-1 15,000
Table diameter mm / in Φ150 / Φ5.9
Max. table speed min-1 6,000
Main motor (cont.) kW / HP 25 / 34
Dresser type   Rotary diamond nib
Dresser diameter mm / in Φ110 / Φ4.3
Dresser speed min-1 Max.3,260
Floor space (W×D) mm / in 3,860 × 4,520 / 152.0×178.0
Machine weight kg / lb 11,500 / 25,400


Business contact: Strategic Sales Operation Department
Phone: +81-77-552-9760

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