MZ120
MZ120

Koepfer MZ120 - Gear hobbing/worm milling machine

The MZ120 is a gear hobbing and worm milling machine for the production of gears and worm gears, straight-toothed bevel wheels, worms and threads. It is suitable for large and small series.

MZ120

The machine is mounted on a solid cast iron base, inclined to the front side by 15°.

The longitudinal-, the shift- and the plunge axis are driven by a ball screw.

The work piece spindle can be equipped with W20 collets, retractable arbors or customer specific work holding.

The CNC-tailstock clamping pressure can reach up to 2000 N, torque controlled. Below 500 N, the clamping pressure is generated by spring load.

The CNC-shift axis is integrated in the hob head and has a travel distance of 34 mm. The Hobbing- and milling spindle is equipped with ball bearings. Tool holders are fit to a cylindrical bore. The swivel angle on the hobbing- and milling spindle is programmable. The range go’s from +45° to 0° to -120°.

The spindle drive is over a precision worm gear.

Options

  • Synchronous axis drive of tailstock spindle (hobbing), dismountable
  • Work piece positioning by dynamic pressure sensor
  • Customer specific loading- and unloading systems

CNC-control

  • Fanuc 30i-B
  • 6 servo axis, optional up to 8 axes
  • Dialog programming
  • Swiveling touch screen with user panel

Technical features

  • Structure out of solid cast iron- and steel, in vibration absorbing execution
  • Improved outlet for chips and coolant
  • Axis distance between work piece and hob up to 70 mm
  • Swivel angle hob head: gear hobbing ± 45 °, worm milling ± 30 °
  • Hob shift 34 mm
  • Clamping systems: center – center, collet W20, retractable arbor, guide bush
  • Hydraulic deburring unit
  • Automatic central lubrication
  • Revolving tailstock (axial)

Workpiece data

  • Module, depending on the material, max. 1.0 mm
  • Workpiece diameter 2 - 45 mm
  • Workpiece length up to 250 mm
  • Hobbing length up to 150 mm

Tool data

  • Gear hobbing: diameter 16 - 32 mm, length up to 40 mm
  • Worm milling: diameter 53 - 70 mm

Workpiece spindle

  • Ratio i = 1:3.875
  • Speed up to 750 rpm

Hobbing- and milling spindle

  • Diameter 40 mm
  • Speed up to 7'000 rpm
  • Power 0.55 kW
  • Torque 2.4 Nm
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