CNC turning and milling center

Okuma Mac Turn 550 W

The machine has received annual maintenance under a service contract with Okuma.

Okuma Mac Turn 550 W / 9-axis Turning-Milling Center
Year of manufacture: 2005
Control: OSP-E 100 L / extension kit “M”, One Touch IGF kit
Milling spindle slide: X/Y/Z/B axes
Sub-spindle W axis
Main spindle with C axis
Sub-spindle with C axis
Lower turret slide X/Z axes
Max. turning diameter: 720 mm
Turning length: 2,000 mm
Distance between tailstock tip and spindle nose: 2,505 mm
Y-axis travel: 250 mm (+/- 125 mm)
Main spindle speed: up to 3,500 rpm
Spindle power: 30 kW
Lower turret: 12 stations without driven tool stations
Lower turret with steady rest, thus only 9 stations instead of 12
Self-centering steady rest: 35 - 240 mm
Milling spindle continuous B axis: 0.001°
Tool magazine: 80 stations
HSK 100 tool interface
New Forkhardt 3-jaw chuck Ø 400 mm (value: €12,000)
Sub-spindle without chuck, currently equipped with mandrel / supplied without mandrel
Enlarged main spindle bore 110 mm (Ø 150/110 mm)
Spindle nose size 11
2-stage clamping pressure
Sub-spindle as hollow shaft motor, speed up to 3,800 rpm
Ethernet LAN interface
Renishaw in-process measurement
Additional measurement system on Y axis
Tool length 450 mm instead of 350 mm
Door automation on both doors
Chip conveyor
Gravity band filter with clean tank, 900 liters
Frequency-controlled supply pump, up to 20 bar

The machine has received annual maintenance through a service contract with Okuma.

In 2023, the cable drag chain of the W axis, including all hoses, was replaced.
In October 2024, the linear guides for X/Y/Z were replaced.
Work performed by Okuma:
- Machine cleaned
- Sheetmetal parts and covers dismantled
- 8th axis dismantled
- Traveling column dismantled and removed from the machine
- ATC removed and taken out of the machine
- All linear guides removed
- Mounting surfaces of the ZA axis cleaned
- New linear guide ZA including carriages installed and tightened to spec
- New ball screw ZA including bearings mounted and fitted
- Baseplate of the traveling column installed and bolted to spec, carriages fastened, lubrication lines connected
- ATC and auxiliary parts reinstalled and connected
- New YA and XA linear guides installed and tightened to spec, new YA ball screw with bearings installed
- Traveling column set in place and lubrication lines connected, XA baseplate installed and aligned
- 8th axis installed and aligned
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- H1 turret installed
- 8th axis drive motor installed
- Install 8th axis and new H1, set up geometry
- Function test 8th axis and H1
- Run-in program for B axis, approx. 12 hours, then drain old oil from 8th axis
- Run-in program for H1 and prepare defect report for OEG
- Left door installed, various sheetmetal parts adjusted
- Chuck installed
- Adjust zero points
- Check tool change

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