Nidec Machine Tool America
Nidec Machine Tool America GE15HS gear hobbing machine; ZI20A-G generating internal gear grinder.

Debuts for Two Gearmaking Machines

July 6, 2022
The high-speed, high-torque GE15HS produces gears up to 150 mm diameter, and the ZI20A-G is a high-volume grinder for hard finishing of internal ring gears, for automotive and truck transmission applications.

NIDEC MACHINE TOOL will debut the GE15HS gear hobbing machine at IMTS 2022 – booth 237036 – in response to manufacturers determination to bring manufacturing in-house, as well as the automaking sector’s increased output of electric vehicles and the increasing levels of automation in manufacturing. Emphasizing high speed, precision and efficiency, the new machine produces gears for electric and hybrid cars, as well as for robotic and automation applications.

The GE15HS model is designed for gears with a maximum diameter of 150 mm, widely used in automobiles and motorcycles. The high-speed, high-torque direct-drive motor for the main cutting spindle provides a maximum spindle speed of 6,000 min-1 – three times faster than previous models. The high efficiency spindle holding the workpiece uses a special table that provides high rigidity and high-speed rotation to handle the necessary thrust load for high efficiency machining. Cutting gears with Nidec super-hard cutting tools yields a surface roughness of less than Ra0.4; on par with gear grinding.

Scott Knoy, Nidec Machine Tool America v.p. of Sales, stated: “The GE15HS provides process efficiency, eliminating the finishing process of shaving prior to heat treatment, thereby improving productivity and reducing processing cost.” A larger machine, the GE25HS, is also available.

Used in combination with Nidec Machine Tool’s new materials and coatings for cutting tools, the GE15HS model provides stable mass production with a maximum cutting speed of 1,500m/min.

More than 2,800 Nidec GE Series hobbing machines have been delivered and installed since the product launch in 2004.

Nidec also will feature the ZI20A-G generating internal gear grinder. Hard finishing of internal ring gears in mass production is the final frontier for automotive and truck transmission applications. For quiet, smoothly meshing internal ring gears, the ZI20A-G uses patented technology for threaded wheel grinding. This breakthrough process delivers fast and very cost-effective production of internal ring gears for planetary gearsets.

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