CG.R SERIES - Grinding machines with moveable centre

Extremely versatile and rigid machine that covers any type of processing. Single-block base of cast iron. With only 3 CNC axis this machine controls the working cycle and also the cycles to dress the operating and the control wheel. The transversal CNC slide with wheel head with the operating wheel is mounted to the base with an inclination of 30°. It makes the structure more compact and more rigid, reducing the distance between the guides and the center of the operating wheel.
The transversal movement of the grinding wheel slide makes it possible to grind details with underhead and the working of hard metal bars with a new oscillating technology, to obtain minimum run-out values.

CG.R 600/200 and CG.R 600/300 with hydrodynamic spindle for the operating wheel and spindle bearing for the control wheel using shoes in bronze in a camber filled with oil.
CG.R 600/400 and CG.R 600/500 with special hydrostatic spindle for the operating wheel and the control wheel.

The shaft of the spindle is fix (stator) and the housing is rotating (rotor). This guarantees maximum rigidity. In all models, the wheels are assembled laterally, for quick change of tools. The dressing devices assembled from the front of the wheel make it possible to profile the wheels in correspondence with the line of contact with the workpiece being worked, so that the first workpiece is obtained in tolerance, in a very short times. The particularly simple structure of the CG.R series also ensures great reliability and a low number of maintenance interventions.


Elements products

CG.R SERIES

CG.R 600/200 CG.R 600/300 CG.R 600/500 *suitable for machining
hard metal bars (HM)

CG.R600/400*
PRODUCTION POSSIBILITY
Diameter of workpiece Ø 3 ÷ Ø 100 mm Ø 3 ÷ Ø 200 mm Ø 4 ÷ Ø 350 mm Ø 4 ÷ Ø 200 mm
Length to be ground with plunge grinding 200 mm 300 mm 500 mm 400 mm
CHARACTERISTICS OF GRINDERS - AXIS (NUMERIC CONTROL)
Diameter of grinding wheel Ø 610 mm Ø 610 mm Ø 610 mm Ø 610 mm
Width of grinding wheel 200 mm 300 mm 500 mm 400 mm
Bore of grinding wheel Ø 304,8 mm Ø 304,8 mm Ø 304,8 mm Ø 304,8 mm
Diameter of control wheel Ø 350 mm Ø 350 mm Ø 350 mm Ø 350 mm
Width of control wheel 200 mm 300 mm 400 ÷ 700 mm 400 ÷ 700 mm
Bore of control wheel Ø 203,2 mm Ø 203,2 mm Ø 203,2 mm Ø 203,2 mm
Peripheral speed of grindig wheel 20 ÷ 60 m/s 20 ÷ 60 m/s 20 ÷ 60 m/s 20 ÷ 60 m/s
Control wheel speed 3 ÷ 300 r.p.m. 3 ÷ 300 r.p.m. 3 ÷ 300 r.p.m. 3 ÷ 300 r.p.m.
Minimum compensation (positive/negative) 0,001 mm 0,001 mm 0,001 mm 0,001 mm
Number of CNC axis (without accessories) 3 3 3 3
POWER
Grinding wheel engine power 22 kW 36 kW 49 kW 49 kW
Control wheel engine power 5,5 kW 5,5 kW 5,5 kW 5,5 kW
Installed power 42 kW 56 kW 70 kW 70 kW
GENERAL CHARACTERISTICS
Total machine weight + services (without accessories) 9500 kg 10500 kg 13500 kg 13500 kg
Machine dimensions on ground + services (without accessories) 4000 x 3200 mm 4000 x 3300 mm 4300 x 4000 mm 4300 x 4000 mm