CNC turning and milling center

Okuma Macturn 550 W

The machine was serviced annually under a maintenance contract with Okuma.

Okuma Mac Turn 550 W / 9-axis turning-milling center
Year of manufacture: 2005,
Control system: OSP-E 100 L / Expansion Kit “M” Kit One Touch IGF
Milling spindle carriage X/Y/Z/B,
Counter spindle W-axis,
Main spindle with C-axis,
Counter spindle with C-axis,
Turret carriage below X/Z axis,
Max. turning diameter: 720 mm,
Turning length: 2,000 mm,
Distance between tailstock center and spindle center: 2,505 mm,
Y-axis: 250 mm / +/- 125 mm,
Main spindle speed: up to 3,500 rpm,
Spindle power: 30 kW
Turret below: 12-station without driven tool stations,
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Turret below with steady rest, therefore only 9 stations instead of 12,
Self-centering steady rest: 35 - 240 mm,
Milling spindle: infinitely variable B-axis 0.001°,
Magazine: 80-station,
Mount: HSK 100,
New Forkhart three-jaw chuck Ø 400 mm, value 12,000 €,
Counter spindle without chuck, currently with arbors / delivery without arbors,
Enlarged main spindle: 110 mm Ø 150/110 mm,
Spindle nose: Size 11,
2-stage clamping pressure,
Counter spindle as a hollow shaft motor, speed up to 3,800 rpm,
Ethernet LAN interface,
Renishaw in-process measurement,
Additional measuring system for Y-axis,
Tool length: 450 mm instead of 350 mm,
Door automation for both doors,
Chip conveyor,
Gravity belt filter with clean tank 900 liters,
Supply pump, frequency-controlled up to 20 bar,

The machine was serviced annually under a maintenance contract with Okuma.

In 2023, the cable carrier for the W-axis, including all hoses, was replaced.
In October 2024, the linear guides X/Y/Z were replaced.
Work performed by Okuma.
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Machine cleaned.
Sheets and covers removed.
8th axis removed.
Travel stand removed and lifted out of the machine. ATC removed and lifted out of the machine.
All linear guides removed.
Mounting surfaces of the Z-axis cleaned.
New linear guide for Z-axis including shoes installed and tightened with the specified torques.
New ball screw for Z-axis including bearing mounted and installed.
Base plate of the travel stand installed and tightened with the specified torques or screwed onto the shoes. Lubrication lines connected.
ATC including attachments installed and connected.
New linear guides YA and XA installed and tightened with the corresponding torques. New ball screw YA including bearing installed.
Travel stand installed and lubrication lines connected. Base plate XA placed and aligned.
8th axis placed and aligned.
H1 turret installed
- Install drive motor for the 8th axis
- Assembly of 8th axis + new H1 and adjust geometry
- Functional test of 8th axis and H1
- Run-in program for B-axis approx. 12 hours, then drain old oil from the 8th axis
- Run-in program for H1 and create defect report for OEG
- Install left door, adjust various sheets
- Install chuck
- Adjust zero points
- Check tool change

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