SBB-CFF-FFS Bm 4/4

Specifications
Specifications
Configuration:;
• UIC	Bo′Bo′
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Length	12,650–13,710 mm (41 ft 6 in – 45 ft 0 in)
Loco weight	72 tonnes (70.9 long tons; 79.4 short tons)
Traction motors	Four
Transmission	Diesel electric

Type and origin
Type and origin
Power type	Diesel
Builder	SLM, SAAS
Build date	1960–1970
Total produced	46

SBB-CFF-FFS Bm 4/4
SBB-CFF-FFS Bm 4/4
Power type
Type and origin
Power type	Diesel
Builder	SLM, SAAS
Build date	1960–1970
Total produced	46
Configuration:;
Specifications
Configuration:;
• UIC	Bo′Bo′
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Length	12,650–13,710 mm (41 ft 6 in – 45 ft 0 in)
Loco weight	72 tonnes (70.9 long tons; 79.4 short tons)
Traction motors	Four
Transmission	Diesel electric
Maximum speed
Performance figures
Maximum speed	75 km/h (47 mph)
Power output	620 kW (831 hp)
Operators
Career
Operators	SBB-CFF-FFS
Numbers	18401–18446
Withdrawn	From 2006

The Bm 4/4 is a heavy diesel shunter built for Swiss Federal Railways. 46 examples were built between 1960 and 1970, and a number remain in service. The class is currently being replaced by new Vossloh locomotives.

See also