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
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.
Workpieces
- Axle arch
- Axle
- Starter shaft
- Drive shaft
- Countershaft
- Bolt
- Bushing
- Excentric shaft
- Gear shaft
- CV joint
- Piston pin
- Piston ring
- Compressor shaft
- Motor shaft
- Pump piston
- Pump pinion
- Pinion shaft
- Pipe
- Roller
- Rotor
- Worm wheel
- Worm shaft
- Spindle
- Rod
- Stator shaft
- Stud
- Tripods
- Turbine shaft
- turbocharger
- Cylinder
- Rolling element
- Shaft
- Tool holder
- Tool Blank
- Gearwheel
- Gear rod
- Spigot
- Cylinder rollers
- Cardan joint
Product Brochures NUMERIKA
Address:
Erwin Junker Maschinenfabrik GmbH
Headquarters
Junkerstraße 2
77787 Nordrach
Germany
Headquarters
Junkerstraße 2
77787 Nordrach
Germany
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