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SBB-CFF-FFS Bm 4/4

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SBB-CFF-FFS Bm 4/4
Bm 4/4 18439 at Lausanne train station
Type and origin
Power typeDiesel
BuilderSLM, SAAS
Build date1960–1970
Total produced46
Specifications
Configuration:
 • AARB-B
 • UICBo′Bo′
Gauge1,435 mm (4 ft 8+12 in)
Length12,650–13,710 mm (41 ft 6 in – 45 ft 0 in)
Loco weight72 tonnes (70.9 long tons; 79.4 short tons)
Traction motorsFour
TransmissionDiesel electric
Performance figures
Maximum speed75 km/h (47 mph)
Power output620kw (840hp)
Career
OperatorsSBB-CFF-FFS
Numbers18401–18446
WithdrawnFrom 2006

The Bm 4/4 is a class of heavy diesel shunting locomotives built for Swiss Federal Railways. 46 examples were built between 1960 and 1970, numbered 18401 to 18446, Starting in 2006, the class was slowly being replaced by new Vossloh-built locomotives. The last SBB example was withdrawn in 2024 but a few are in use with private operators

See also

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