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Grind Two Eccentric Areas in the Same Chucking

GPES-30 CNC Eccentric Pin / Polygon Grinders from Shigiya grind two different eccentric areas within the same chucking to eliminate or drastically reduce setup time.

Posted: September 23, 2014

For smooth and stable movement, the GPES-30 uses closed hydrostatic slide ways for the wheel head feed that automatically adjust to maintain the position of the wheel head to perform eccentric grinding to an accuracy of less than 1 µ.

Shigiya Machinery Works (USA) Ltd. (Schaumburg, IL), a world-class manufacturer of cylindrical grinders, introduces its efficient and high accuracy GPES-30 Series of CNC Eccentric Pin / Polygon Grinders. Featuring a highly rigid base and thermal expansion control, the GPES-30 is designed for accuracy.

The GPES-30’s revolutionary process of grinding two different eccentric areas within the same chucking eliminates or drastically reduces setup time. Journal grinding and face grinding options are available. An innovative polygon grinding method also eliminates or reduces training and adjusting. Plunge, oscillation and traverse grinding are also available.

For smooth and stable movement, the GPES-30 features closed hydrostatic slide ways for the wheel head feed, which automatically adjust to maintain the position of the wheel head. As a result, eccentric grinding can be performed to an accuracy of less than 1 µ.

A high-speed non-circular wedge-type hydrodynamic spindle bearing further contributes to high accuracy and high efficiency grinding. The direct drive spindle features a high precision angular contact bearing with no backlash on movement.

Located behind the work head, the rotary diamond dresser’s spindle is supported by an ultra-precise angular contact bearing and lubricated with Micro-fog. An AE sensor and wheel flatness sensor are also included as standard. The GPES-30 tailstock is mounted with a large diameter spindle to further ensure high precision heavy grinding.

The GPES-30 is controlled with an easy-to-use conversational programming system. With this system, eccentric pin grinding offset direction can be quickly measured with the OD gauge, and operators can choose from 13 polygon pre-programmed shapes. Other features of the system include shape compensation, automatic work head speed override, automatic grinding conditions, a new wheel dressing cycle and an indicator for X-axis speed and acceleration.

The GPES-30 features a ø 300 mm swing over table, and 250 mm or 630 mm distance between centers. Wheel size is ø 350 (OD) by 25 (W) by 127 (ID) mm.

Shigiya Machinery Works (USA) Ltd., 651 E. State Parkway, Schaumburg, IL 60173, 847-325-4800, Fax: 847-325-4218, [email protected], www.shigiya.com.