Java bogie

It got its name because it was first installed in the 3000 series express train locomotives delivered to the Electrische Staats Spoorwegen (ESS) on Java in 1925.

The planned increase in the maximum speeds on the electrified main lines in Switzerland beyond 100 km/h prompted the SLM designer Jakob Buchli to improve the cornering of the electric locomotives.

The larger part of the SBB-CFF-FFS Ae 4/7 was also equipped with Java bogies, which gave them very good running properties.

With the SBB Ae 4/6 10807-10812 (1944/45) a further development of the Java frame was used, in which centering springs and a reset device were supposed to cause stable running on straight stretches and smooth cornering.

The gas turbine locomotive SBB-CFF-FFS Am 4/6 1101, which was put into operation in 1941, had a similar arrangement of axles, which was converted from 1958–61 to Ae 4/6 III 10851.

Java bogie, in front the drawbar with the swivel joint, on the drive axle (front axle) gear and coupling of an SLM universal drive
Running gear of a (1A) B (A1) locomotivewith Java bogies at the ends (outside carrying axles as Adams axles, inside driven axles) and transversely displaceable driven axles between the Java bogies, above: straight ahead; below: cornering
the Electrische Staats Spoorwegen (ESS) series 3000 on Java .