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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

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
Control System - NUMERIKA
  • 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
Wheelhead - NUMERIKA
  • 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
Workhead - FELXA
  • 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
Tailstock - FLEXA
  • 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
Machine bed - gray cast
  • With gray cast iron design
  • High torsional rigidity and good damping behavior
  • Proven quality
MEASURING
Measuring FLEXA
  • 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
Dressing Unit FLEXA
  • Single-grain diamond or dressing fleece (standard)
  • Rotating dressing (optional):
  1. Diamond profile grinding wheel
  2. Diamond shape roller
POSITIONING
Positioning FLEXA
  • 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
Hydrostatic Bearings
  • Use in radial and axial bearings of wheelheads and workheads
  • Perfect rotational movement and constant centering of shaft
  • Vibration-damping
HYDROSTATIC GUIDE
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
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

NUMERIKANUMERIKA
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Address:

Erwin Junker Maschinenfabrik GmbH
Headquarters
Junkerstraße 2
77787 Nordrach
Germany