CNC-Gear Grinding Machine NILES ZP 20

used CNC Gear Grinding Machine NILES ZP 20

manufacturer: NILES
type: ZP 20
built: 2006


EXW under power available

Technical Equipment / Features

Our gear grinding machine NILES ZP 20 with Siemens Sinumerik 840D control is designed for high-precision finishing of straight and helical external and internal gears. Workpieces up to a diameter of 2,000 mm, a weight of 18 tons and a maximum module of 34 mm can be ground. Double helical gears are also possible. For long workpieces, a counterholder with steady rest arm is available as a support. The machine concept in hydrostatic design promises a long service life with simultaneously highest workpiece accuracy. A measuring protocol for the accuracy of the machine prepared by the manufacturer is available and can be sent on request.
Designed and built by german premium manufacturer NILES, it is a respected alternative to comparable Höfler or Gleason Pfauter gear grinders in these sizes.

working area:  
max. grind able diameter 2.000 mm
max. profile depth 75 mm
max. modul 34 mm
axis-distance rotary table - grinding wheel 300 - 1.210 mm
radial travel (Y) 910 mm
axial travel (X) 1.000 mm
Hydrostatic guideways in rotary table, Y-axis, X-axis - thereby no wear and no “stick slip”
grinding spindle:  
speed max. 3.130 min-1
power 25 kW
diam. spindle 80 mm
swivel range +/- 45°
grinding wheel diam. max. 400 mm
grinding wheel width max. 100 mm
workpiece table (C-axis):  
table diam. 1.365 mm
table bore ∅ 650 x 220 mm
diameter x depth ∅ 475 x 300 mm
  ∅ 400 x 500 mm
table load max. 180 kN
Hydrostatique guideway and Torque-motor  
2. grinding carriage:  
Grinding-carriage “Z” with external grinding spindle “Z”
Grinding-carriage “W” for measuring device or internal grinding spindle
Tailstock with steady-rest for max. work piece diam. 1.600 mm. Automatic movable up and down sliding bolts in bronze - diameter adjustable.
In case of grinding work piece with diam. bigger than
1.600 mm the tailstock can be adjusted outside of the working area.
internal grinding unit ZP 4:  
The internal grinding device is mounted on the grinding carriage "W" and consists of a swivel device and various grinding arms. The internal grinding spindle is driven by the grinding wheel drive "W" (25 kW).
For dressing, the grinding arm is swivelled into the dressing position and the grinding wheel is dressed with the CNC dressing device. The working range for each individual case is defined by
to determine individual collision investigations.
grinding arm V300/350 + V300/370:  
max. profile depth 45 mm
max. tooth-width - straight toothed 350 mm
max. grinding wheel 300 mm
max. width grinding wheel 50 mm
min. dressable diam. grinding wheel 180 mm
max. modul two-flank grinding ca. 20 mm
max. modul one-flank grinding ca. 24 mm
SIEMENS SINUMERIK 840 D with 7 CNC-axis plus spindle
All axis with digital servo units.15“-TFT colour screen, SIMODRIVE 611 D,
PLC in S7, NCU 573
Dialog programming for automatic program-generating for part-programs for profile-grinding of
- NC-Dressing-Unit with 1 dressing-spindle for diamond-dressing-disc
- Complete coolant device (ca. 2.000 l) incl. band filter (400 l/min)
- Dust-exhauster
- Oil-coolant-system for lubrication-oil, coolant-oil and grinding-spindle
- Full-covering of the working-area
- Automatic grinding-head-swivelling and clamping stepless
- Touch-probe inside the working-area for gear measuring
- Electronical hand-wheel
- Power-display for grinding-motor with overload-advice
- Special-software for double-helical-gears
- Internal grinding unit ZP 4 with two (2) grinding-arms V 300/350 + V 300/370
- Automatically cut-splitting
- Measuring of tip- and root-diameter
- Electrical removing of the axis in case of emergency
- Telephone Diagnose system
- Machine in metrical performance
- Electrical equipment on DIN EN 60204/VDE 0113 part 1, power supply 400 V (50 Hz),
- Machine colour white RAL 9002 und red RAL 3003