Danobat Mikroturn Vertical 1000V4

Simultaneous turning of the outside and inside diameter is what the Danobat Mikroturn Vertical 1000V4 adds to the one-metre vertical hard turning lathe. Danobat's statement is that the Mikroturn V4 machines OD and ID simultaneously, greatly contributing to cycle time savings of up to 40%. Capacity is 1,000 mm (39.37 in) in diameter by 350 mm (13.8 in) in height.

On a bearing ring, the raceway side and the opposite diameter are usually the two longest cuts. Taking them together shortens the cycle, and it has a second effect that the 40% figure does not capture: with a tool on each side of the wall, cutting forces partly oppose each other, which helps a thin ring stay round. That is a reasoned benefit, not one Danobat quantifies.

In the table the 1000V4 differs from the Mikroturn Vertical 1000V2 in one row only. Floor space is 37 m² (398 sqft) against the 36 m² (387.5 sqft) of the Mikroturn Vertical 1000V2. Diameter, height, the 200 rpm spindle speed and the Siemens Sinumerik One control are identical. The extra slide evidently fits in almost the same enclosure.

Accuracy data is given for the Mikroturn Vertical as a family. Workpieces are quoted at dimensional tolerances of ≤ 2 µm, roundness of ≤ 0.5 µm and 0.1 – 0.4 µm Ra. The hydrostatic main spindle has a guaranteed run-out error of ≤ 0.1 µm and the hydrostatic guideways position to 1 µm with 0.2 µm repeatability. If the rings are larger than a metre, the Mikroturn Vertical 1500V4 offers the same simultaneous process at 1,500 mm (59 in) in the same 37 m² (398 sqft).