#3571
SBB Bm 4/4
🇨🇭 Switzerland ·built by Swiss Locomotive and Machine Works· from 1960· locomotive class
10 photos from Wikimedia Commons · credits & licences
- 1. SBB Bm 4 4 18424: Andreas Karrer· CC BY-SA 3.0
- 2. FFS Bm 4-4 18439 Lausanne 070411: NAC· CC BY-SA 3.0
- 3. 2013 03 09 Bm 4 4 18427 1 ROK 0549: Lord Koxinga· CC BY-SA 3.0
- 4. 2013 03 09 Bm 4 4 18427 2 ROK 0563: Lord Koxinga· CC BY-SA 3.0
- 5. 2013 03 09 Bm 4 4 18427 3 ROK 0557: Lord Koxinga· CC BY-SA 3.0
- 6. 2013 03 09 Bm 4 4 18427 4 ROK 0554: Lord Koxinga· CC BY-SA 3.0
- 7. Bm 4-4 18446 Lausanne voie 2: Abaddon1337· CC BY-SA 3.0
- 8. BM 4-4 18446 Lausanne: Abaddon1337· CC BY-SA 3.0
- 9. Diesellok SBB Bm 4-4 Nr. 18437: JoachimKohler-HB· CC BY-SA 4.0
- 10. FFS Bm 4-4 18437 Erstfeld 220911 targa: NAC· CC BY-SA 4.0
what is it?
The Bm 4/4 is a class of heavy diesel shunting locomotives built by SLM for the 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.
who runs it
base stats
Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.
fun facts
- First built 66 years ago, in 1960.
- 626 kW is about 7 family cars (~85 kW each) flat out.
- Weighs about as much as 12 African elephants (~6 t each).
diesel locomotive: A diesel engine on board drives the wheels, usually through a generator (diesel-electric).
spec sheet
- built
- 1960–1970
- retired
- 2006
- status
- retired
- number built
- 46
- kind
- Diesel
- traction
- diesel
- origin
- 🇨🇭 Switzerland
- builders
- Swiss Locomotive and Machine Works
- operators
- Swiss Federal Railways
- top speed
- 75 km/h
- power
- 626 kW
- gauge
- 1,435 mm standard gauge
- wheel arrangement
- Bo′Bo′
- weight
- 72 t
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q432603, Wikipedia: SBB Bm 4/4 (CC BY-SA 4.0).Updated 2026-10-25.