Vertical CNC Grinder includes polygon capability.

Press Release Summary:

Featuring compact 10.76 ft² main body, Model GPV-10-20 is powered by direct drive motor which facilitates polygon grinding. System features 3.93 in. diameter swing over table, max work piece height of 7.87 in. and weight capacity of 22.05 lb. Gate structure ensures accuracy by counter measuring against vibration, thermal displacement, and noise. Mounted on wheel side of wheelhead, non-concentric hydrodynamic bearing maintains low processing heat by optimizing bearing clearance and wedge angle.

Original Press Release:

World's First Vertical CNC Grinder from Shigiya Now Includes Polygon Capability

Schaumburg, IL – SHIGIYA (USA) LTD. revolutionized the industry with the introduction of the world’s first vertical CNC grinder. Once again, the world-class manufacturer of cylindrical grinders is making news – this time by upgrading its GPV-10 Vertical CNC Grinders to include polygon capability. Engineered in response to customer demands, Shigiya’s new GPV-10-20 Vertical CNC Grinder incorporates the advanced polygon grinding technology utilized in their successful GPES Series.

The GPV-10-20 features a compact footprint to accommodate a range of production line layouts. Its main body is approximately 1m2 (10.76 square feet), or about half the size an existing Shigiya GAC-20 Grinder. A smaller size results in a machine that’s less expensive than a horizontal version without sacrificing accuracy or advanced features.

Including a workhead that is powered by a direct drive motor, the GPV-10-20 grinds small workpieces with greater precision and control than a belt-driven grinder. This direct drive motor has been upgraded from the original GPV-10 to facilitate polygon grinding. An innovative gate structure further ensures accuracy by counter measuring against vibration, thermal displacement and noise. A top beam securely connects the upper portion of the two columns. The superior rigidity of the GPV-10-20 ensures extreme precision after a cold start, and even during post-process grinding.

Further contributing to GPV-10-20 accuracy is Shigiya’s original non-concentric hydrodynamic bearing for the wheel spindle. Mounted on the wheel side of the wheelhead, this bearing maintains low processing heat by optimizing the bearing clearance and the wedge angle. Infeed is performed by the table moving toward the wheel.

Features that promote ease of use include a wide machine opening that allows for flexible automation of loading/unloading and easy maintenance, an electrical control panel hinged on the rear of the machine that swings open wide to ensure enough working space for easy wheel change. The grinding wheel is not angled and does not require a wheel changer to be changed.

The GPV-10-20 includes the option to install the control panel on the left or the right side of the machine for easy automation in tight spaces.

Specifications for the GPV-10-20 include a swing over table of ø 100 mm (3.93 inches), a maximum work piece height of 200 mm (7.87 inches) and a weight capacity of 10 kg (22.05 lbs).

For more information, contact SHIGIYA (USA) LTD., 651 E. State Pkwy, Schaumburg, IL 60173, Phone: (847) 325-4800, Fax: (847) 325-4218, e-mail:, or visit

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