NUMERIKA
Highlights
Grinding Process
Technical data
Equipment and Options
Workpieces

NUMERIKA

NUMERIKA - Cylindrical grinding machines

First-Class Shaft Grinding

Versatile, rugged, long-life – the cylindrical grinding machines of the Numerika series meet any requirements for the series production of a broad range of workpieces; in the largest version up to a length of 3.70 m. A torsion-resistant machine bed, hydrostatic guides and grinding spindles mounted on rolling or hydrostatic bearings provide for perfect grinding results. The user-friendly control system offers all required input screens for grinding with corundum.

Highlights

Precise grinding with corundum
High productivity through short cycle time
Flexibility when grinding workpiece families
Automatic loading and unloading systems adapted to customer requirements
High degree of automation for integration in production lines
In-process and/or post-process measurement
Recording of error messages
Rugged machine bed with full-protection hood
CNC control system with user-friendly interface

Grinding process descriptions

GL 600

GL 1200

G 500

G 800

G 1500

G 2000

Technical data: NUMERIKA GL 600

Grinding Length: 600 mm
Clamping Length: 800 mm
Center Height: 140 mm
Component Weight: 80 kg
Swing Diameter: 275 mm
Grinding Wheel Diameter: 406 x 152 mm
Grinding Wheel Motor Output: 5,5 (7,5) kW
Grinding Wheel Width: 50 (80) mm
Workpiece Spindle Speed: 1.000 U/min
Workpiece Spindle Internal Morsetaper: 4
Tailstock Internal Morsetaper: 4
Tailstock Stocklength: 35 mm
Tailstock Taper Correction: ± 0,15 mm
Installed Total Input: 15 (17) kW
Cnc Control System: Fanuc 0i TD, Fanuc 0i F
WxDxH mm (without peripherals): 2905 x 2045 x 2040
Weight: 5.000 kg

Technical data: NUMERIKA GL 1200

Grinding Length: 1200 mm
Clamping Length: 1400 mm
Center Height: 140 mm
Component Weight: 120 kg
Swing Diameter: 275 mm
Grinding Wheel Diameter: 406 x 152 mm
Grinding Wheel Motor Output: 5,5 (7,5) kW
Grinding Wheel Width: 50 (80) mm
Workpiece Spindle Speed: 1.000 U/min
Workpiece Spindle Internal Morsetaper: 4
Tailstock Internal Morsetaper: 4
Tailstock Stocklength: 35 mm
Tailstock Taper Correction: ± 0,15 mm
Installed Total Input: 15 (17) kW
Cnc Control System: Fanuc 0i TD, Fanuc 0i F
WxDxH mm (without peripherals): 3745 x 2045 x 2040
Weight: 6.000 kg

Technical data: NUMERIKA G 500

Grinding Length: 500 mm
Clamping Length: 600 mm
Center Height: 140 mm
Component Weight: 120 kg
Swing Diameter: 275 mm
Grinding Wheel Diameter: 508 x 203,2 mm
Grinding Wheel Motor Output: 7,5 (11) kW
Grinding Wheel Width: 80 (100) mm
Workpiece Spindle Speed: 600 U/min
Workpiece Spindle Internal Morsetaper: 5
Tailstock Internal Morsetaper: 4
Tailstock Stocklength: 35 mm
Tailstock Taper Correction: ± 0,15 mm
Installed Total Input: 17 (22) kW
Cnc Control System: Fanuc 0i TD, Fanuc 0i F
WxDxH mm (without peripherals): 3380 x 1960 x 2000
Weight: 6.000 kg

Technical data: NUMERIKA G 800

Grinding Length: 800 mm
Clamping Length: 900 mm
Center Height: 140 mm
Component Weight: 120 kg
Swing Diameter: 275 mm
Grinding Wheel Diameter: 508 x 203,2 mm
Grinding Wheel Motor Output: 7,5 (11) kW
Grinding Wheel Width: 80 (100) mm
Workpiece Spindle Speed: 600 U/min
Workpiece Spindle Internal Morsetaper: 5
Tailstock Internal Morsetaper: 4
Tailstock Stocklength: 35 mm
Tailstock Taper Correction: ± 0,15 mm
Installed Total Input: 17 (22) kW
Cnc Control System: Fanuc 0i TD, Fanuc 0i F
WxDxH mm (without peripherals): 3730 x 1960 x 2000
Weight: 6.500 kg

Technical data: NUMERIKA G 1500

Grinding Length: 1.500 mm
Clamping Length: 1.600 mm
Center Height: 140 mm
Component Weight: 180 kg
Swing Diameter: 275 mm
Grinding Wheel Diameter: 508 x 203,2 mm
Grinding Wheel Motor Output: 7,5 (11) kW
Grinding Wheel Width: 80 (100) mm
Workpiece Spindle Speed: 600 U/min
Workpiece Spindle Internal Morsetaper: 5
Tailstock Internal Morsetaper: 4
Tailstock Stocklength: 35 mm
Tailstock Taper Correction: ± 0,15 mm
Installed Total Input: 17 (22) kW
Cnc Control System: Fanuc 0i TD, Fanuc 0i F
WxDxH mm (without peripherals): 4430 x 1960 x 2000
Weight: 8000 kg

Technical data: NUMERIKA G 2000

Grinding Length: 2.000 mm
Clamping Length: 2.100 mm
Center Height: 140 mm
Component Weight: 250 kg
Swing Diameter: 275 mm
Grinding Wheel Diameter: 508 x 203,2 mm
Grinding Wheel Motor Output: 7,5 (11) kW
Grinding Wheel Width: 80 (100) mm
Workpiece Spindle Speed: 600 U/min
Workpiece Spindle Internal Morsetaper: 5
Tailstock Internal Morsetaper: 4
Tailstock Stocklength: 35 mm
Tailstock Taper Correction: ± 0,15 mm
Installed Total Input: 17 (22) kW
Cnc Control System: Fanuc 0i TD, Fanuc 0i F
WxDxH mm (without peripherals): 5130 x 1960 x 2000
Weight: 9000 kg

Equipment and Options

CONTROL SYSTEM: Fanuc (standard) or Siemens (option)
NUMERIKA software developed especially for the requirements of external cylindrical grinding
Easy programming, installation and operation of the machine thanks to standard ISO programming
Ergonomic machine setup through the machine control in a pivotable and movable* control panel (*from platform 1500)
Wheelhead: Insensitive to vibrations and low maintenance thanks to spindle mounted on hydrostatic bearings
Peripheral speed: 45 (60) m/s
Different wheelhead versions (fixed or can be swiveled) for straight or angular plunge cuts (0° – 30°) as well as high-resolution B-axis
Automatic compensation of grinding wheel diameter after dressing
WORKHEAD: With fixed, revolving or universal applicable center
Long service life due to spindle mounted in hydrostatic bearings (high-precision roller bearing optional)
Speed programmable in a range from 20 to 1,000 rpm
TAILSTOCK: With fixed, revolving or universal applicable center
Hydraulically controlled tailstock sleeve with adjustable axial pretension
Precision adjustment of taper +/- 0.15 mm
High-speed retooling with combined external and internal grinding due to CNC-controlled tailstock adjustment (optional)
MACHINE BED: With gray cast iron design
High torsional rigidity and good damping behavior
Proven quality
MEASURING: Measurement systems are adapted to the workpieces and customer specifications
In-process measurement device for measuring smooth or interrupted external diameters
Large diameter measuring range possible
DRESSING UNIT: Single-grain diamond or dressing fleece (standard)
Rotating dressing (optional):
Diamond profile grinding wheel
Diamond shape roller
POSITIONING: Automatic recording of reference surfaces on the clamped workpiece through bidirectional positioner
Recorded values are automatically integrated into the grinding process
Retractable integration on the wheelhead
Touch-trigger probe for precise workpiece detection
HYDROSTATIC BEARINGS: Use in radial and axial bearings of wheelheads and workheads
Perfect rotational movement and constant centering of shaft
Vibration-damping
HYDROSTATIC GUIDE: Use in the X and Z-axis, designed as compound slide rests
Uniform, jolt-free movement (no stick-slip effect)
Drive via servomotors with absolute encoders
High-precision positioning for precise grinding results
FIRE PROTECTION AND LTA AIR FILTERS: In case of an fire, the machine interior is automatically hermetically sealed, suffocating a fire before it has a chance to spread. If required, extinguishers (CO² or water mist systems) and exhaust air purification systems can be additionally installed. A competent partner for fire protection and filtration solution solutions is LTA Lufttechnik GmbH, which also belongs to the JUNKER Group and which researches, develops and produces filtration systems for industrial air purification.