Logo

FLEXA

FLEXA - Cylindrical grinding machines

OD/ID grinding

The versatile grinding machines of the FLEXA series are ideal for the flexible processing of different grinding assignments on a single workpiece. The FLEXA is capable of the ultra-precise execution of up to three grinding assignments with minimal retooling time. Whether internal or external grinding and even thread grinding, its modular design makes this conventional, robust grinding machine ideal for small and medium-sized production runs.

Highlights

  • Precise grinding with corundum
  • Flexibility with external and internal grinding spindles
  • Rugged machine bed with full-protection hood
  • Hydrostatic guide of X and Z-axis
  • CNC control system with user-friendly interfacee

Grinding process descriptions

External grinding

External-/Internal grinding

Internal grinding

Internal grinding with interpolation

Technical data: FLEXA 1200 L

Grinding Length
1.200 mm
Clamping Length
1.400 mm
Center Height
175 mm
Component Weight
120 kg
Swing Diameter
345 mm
Grinding Wheel Diameter
406 x 152 mm
Grinding Wheel Motor Output
5,5 (7,5) kW
Grinding Wheel Width
50 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
Internal Grinding Spindle: Inner Grinding Wheel Diameter (Max.)
200
Internal Grinding Spindle: Workpiece Length (Max.)
1.050 mm
Internal Grinding Spindle: Motor Power
2,2 kW
Installed Total Input
15 kW
Cnc Control System
Fanuc 0i
WxDxH mm (without peripherals)
3.745 x 2.045 x 2.040 mm
Weight
6.000 kg
Component Weight
120 kg

Wheelhead FLEXA 1200 L

  • UN1
    UN1
  • UN2
    UN2
  • UN3
    UN3
  • UN4
    UN4

Technical data: FLEXA 1500 M

Grinding Length
1.500 mm
Clamping Length
1.700 mm
Center Height
230 mm
Component Weight
180 kg
Swing Diameter
450 mm
Grinding Wheel Diameter
508 x 203,2 mm
Grinding Wheel Motor Output
5,5 (7,5) kW
Grinding Wheel Width
80 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
Internal Grinding Spindle: Inner Grinding Wheel Diameter (Max.)
200
Internal Grinding Spindle: Workpiece Length (Max.)
1.050 mm
Internal Grinding Spindle: Motor Power
2,2 kW
Installed Total Input
15 kW
Cnc Control System
Fanuc 0i
WxDxH mm (without peripherals)
4.430 x 1.960 x 2.000 mm
Weight
8.000 kg
Component Weight
180 kg

Wheelhead FLEXA 1500 M

  • UN1
    UN1
  • UN2
    UN2
  • UN3
    UN3
  • UN4
    UN4

Technical data: FLEXA 2000 M

Grinding Length
2.000 mm
Clamping Length
2.100 mm
Center Height
230 mm
Component Weight
180 kg
Swing Diameter
450 mm
Grinding Wheel Diameter
508 x 203,2 mm
Grinding Wheel Motor Output
5,5 (7,5) kW
Grinding Wheel Width
80 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
Internal Grinding Spindle: Inner Grinding Wheel Diameter (Max.)
200
Internal Grinding Spindle: Workpiece Length (Max.)
1.050 mm
Internal Grinding Spindle: Motor Power
2,2 kW
Installed Total Input
15 kW
Cnc Control System
Fanuc 0i
WxDxH mm (without peripherals)
5.130 x 1.960 x 2.000 mm
Weight
8.000 kg
Component Weight
180 kg

Wheelhead FLEXA 2000 M

  • UN1
    UN1
  • UN2
    UN2
  • UN3
    UN3
  • UN4
    UN4

Technical data: FLEXA 2000 H

Grinding Length
2.000 mm
Clamping Length
2.200 mm
Center Height
230 (330) mm
Component Weight
250 kg
Swing Diameter
450 (650) mm
Grinding Wheel Diameter
760 x 304,8 mm
Grinding Wheel Motor Output
18 kW
Grinding Wheel Width
100 mm
Workpiece Spindle Speed
500 U/min
Workpiece Spindle Internal Morsetaper
5
Tailstock Internal Morsetaper
5
Tailstock Stocklength
60 mm
Tailstock Taper Correction
± 0,15 mm
Internal Grinding Spindle: Inner Grinding Wheel Diameter (Max.)
350
Internal Grinding Spindle: Workpiece Length (Max.)
1.800 mm
Internal Grinding Spindle: Motor Power
5 kW
Installed Total Input
30 kW
Cnc Control System
Fanuc 0i
WxDxH mm (without peripherals)
5.160 x 3.150 x 2.425 mm
Weight
17.000 kg
Component Weight
250 kg

Wheelhead FLEXA 2000 H

  • UN1
    UN1
  • UN2
    UN2
  • UN3
    UN3
  • UN4
    UN4

Technical data: FLEXA 3000 H

Grinding Length
3.000 mm
Clamping Length
3.200 mm
Center Height
230 (330) mm
Component Weight
350 kg
Swing Diameter
450 (650) mm
Grinding Wheel Diameter
760 x 304,8 mm
Grinding Wheel Motor Output
18 kW
Grinding Wheel Width
100 mm
Workpiece Spindle Speed
500 U/min
Workpiece Spindle Internal Morsetaper
5
Tailstock Internal Morsetaper
5
Tailstock Stocklength
60 mm
Tailstock Taper Correction
± 0,15 mm
Internal Grinding Spindle: Inner Grinding Wheel Diameter (Max.)
350
Internal Grinding Spindle: Workpiece Length (Max.)
2.300 mm
Internal Grinding Spindle: Motor Power
5 kW
Installed Total Input
30 kW
Cnc Control System
Fanuc 0i
WxDxH mm (without peripherals)
6.160 x 3.150 x 2.425 mm
Weight
20.000 kg
Component Weight
350 kg

Wheelhead FLEXA 3000 H

  • UN1
    UN1
  • UN2
    UN2
  • UN3
    UN3
  • UN4
    UN4

Technical data: FLEXA 600 L

Grinding Length
600 mm
Clamping Length
800 mm
Center Height
175 mm
Component Weight
80 kg
Swing Diameter
345 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
Internal Grinding Spindle: Inner Grinding Wheel Diameter (Max.)
200
Internal Grinding Spindle: Workpiece Length (Max.)
450 mm
Internal Grinding Spindle: Motor Power
2,2 kW
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
4950 kg
Component Weight
80 kg

Wheelhead FLEXA 600 L

  • UN1
    UN1
  • UN2
    UN2
  • UN3
    UN3
  • UN4
    UN4

Equipment and Options

MACHINE BED
Machine bed - gray cast
  • With gray cast iron design
  • High torsional rigidity and good damping behavior
  • Proven quality
CONTROL SYSTEM
Control System FLEXA
  • Fanuc (standard) or Siemens (option)
  • Specially developed FLEXA software for the combined requirements of internal and external 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)
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
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
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
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)
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
HYDROSTATIC BEARINGS
Hydrostatic Bearings
  • Use in radial and axial bearings of wheelheads and workheads
  • Perfect rotational movement and constant centering of shaft
  • Vibration-damping
WHEELHEAD
Wheelhead - FLEXA
  • Insensitive to vibrations and low maintenance thanks to spindle mounted in hydrostatic bearings
  • (High-performance) external grinding with corundum grinding wheel
  • High-precision internal grinding with a high grinding depth
  • Additional internal grinding fixture possible, with hydraulic swivel action using HF spindle
  • Versatile grinding scope through straight / inclined plunge cut grinding or indexed B axis
  • Automatic compensation of grinding wheel diameter after dressing
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
  • Starter shaft
  • Drive shaft
  • Countershaft
  • Bolt
  • Bushing
  • Excentric shaft
  • Gear shaft
  • Piston pin
  • Piston ring
  • Motor shaft
  • Pump piston
  • Pump pinion
  • Pinion shaft
  • Pipe
  • Roller
  • Rotor
  • Worm wheel
  • Worm shaft
  • Spindle
  • Rod
  • Stator shaft
  • Stud
  • Turbine shaft
  • Cylinder
  • Rolling element
  • Shaft
  • Tool holder
  • Tool Blank
  • Gearwheel
  • Gear rod
  • Spigot
  • Cylinder rollers

Product Brochures

FLEXA.pdf
To the top
Back to list view

Address:

Erwin Junker Maschinenfabrik GmbH
Headquarters
Junkerstraße 2
77787 Nordrach
Germany