Contents
Nidec Machine Tool Corporation has introduced the ZI35A, a mass-production machine for high-speed, high-precision grinding of internal gears. According to the announcement published by NIDEC MACHINE TOOL AMERICA on 15 October 2026, the machine handles internal gears up to 350 mm in outer diameter and targets the large ring gears used in industrial robots, automobiles and other applications.
100 mm more capacity than the ZI25A
The ZI35A builds on the ZI25A and increases the maximum outer diameter by 100 mm. It covers modules 1 to 4, with module 5 possible depending on conditions. The table axis supports loads up to 200 kg, and gears up to 20 kg can be transferred automatically.
Standard table axis tuning and in-machine dressing
Nidec adds a Table Axis Tuning Function as standard for consistent accuracy, along with automation features such as automatic workpiece loading and unloading. Generating grinding uses a patented barrel-shaped threaded wheel at a crossed-axis angle of 20° to 35°.
The wheel is dressed without removing it, with dresser spindle speeds up to 6,000 min⁻¹, and an optional rotary dressing device is available. Touch-probe thermal displacement compensation is offered as an option for extended continuous operation. The machine also features a 21.5-inch LCD, automatic gear meshing with an AE sensor and on-screen coolant and temperature monitoring.
Main specifications
- Max. workpiece outer diameter: 350 mm
- Module: 1–4 (5 depending on conditions)
- Max. grinding wheel spindle speed: 15,000 min⁻¹
- Max. table speed: 3,500 min⁻¹
- Max. table load: 200 kg
- NC control: FANUC Series 31i-B5 Plus (7 axes; 8 axes optional)
- Installation dimensions (standard): 5,510 × 5,450 × 3,300 mm (W × D × H)
- Machine mass: approx. 15,000 kg
Sources
- NIDEC MACHINE TOOL AMERICA, “Nidec Machine Tool Introduces the ZI35A Internal Gear Grinding Machine for High-Volume Production”, 15 October 2026: nidec-machinetoolamerica.com
Image: NIDEC MACHINE TOOL AMERICA
Author
Editör
Güç Aktarım MagazineGüç Aktarım · September 2026Read the latest issue free →
