© trainspo.comEMD Class 66/7
Built by EMD
Overview of the EMD Class 66/7
Discover the robust Class 66/7 locomotive, a powerful diesel engine designed for heavy-duty railway operations.
This versatile locomotive, built by EMD, boasts impressive capabilities with a top speed of 120 km/h and a formidable tractive effort of 260 kN. Its substantial weight of 127 tonnes and a powerful 2385 kW output make it ideal for various freight hauling roles.
Operating on a standard gauge of 1435 mm, the Class 66/7 features a Co'Co' axle arrangement, ensuring excellent traction and stability. Its generous dimensions, with a width of 2.64 m and a height of 3.9 m, are optimized for standard railway infrastructure.
In the United Kingdom, the Class 66/7 is a familiar sight, serving with prominent operators like Colas Rail UK and GB Railfreight, demonstrating its reliability and essential contribution to rail freight services.
EMD Class 66/7 technical specifications
| Value | Imperial / US | |
|---|---|---|
| Series | Class 66 | |
| Built by | EMD | |
| Top speed | 120 km/h75 mph | |
| Power output | 2,385 kW3,198 hp | |
| Tractive effort | 260 kN58,450 lbf | |
| Track gauge | 1,435 mmStandard gauge4 ft 8½ in | |
| UIC axle arrangement | Co'Co' | |
| Width | 2.64 m8 ft 8 in | |
| Height | 3.9 m12 ft 10 in | |
| Weight | 127 t279,987 lb |
Operators of the EMD Class 66/7
Railway companies that have operated the Class 66/7, with the class designation used by each of them.
| Operator | Class | Country |
|---|---|---|
| Colas Rail UK | Colas Rail 66/7 | United Kingdom |
| GB Railfreight | GBRf 66/7 | United Kingdom |
EMD Class 66/7 photos
Photos © their respective authors, shared on trainspo.com. They may show liveries or variants that differ from the specifications above.
More diesel locomotives from EMD

EMD
Class 66/0
Diesel locomotive
120 km/h · 2,385 kW

EMD
Class 66/3
Diesel locomotive
120 km/h · 2,385 kW

EMD
Class 66/5
Diesel locomotive
120 km/h · 2,385 kW

EMD
Class 66/8
Diesel locomotive
120 km/h · 2,385 kW

EMD
Class 66/9
Diesel locomotive
120 km/h · 2,385 kW

EMD
G16
Diesel locomotive
1965–1973 · 120 km/h

EMD
G22CW
Diesel locomotive
1968–1990 · 120 km/h

EMD
JT42CWR
Diesel locomotive
1998 · 120 km/h
Similar diesel locomotives from other manufacturers

ABR
SNCB 60
Diesel locomotive
1964–1965 · 120 km/h

ACEC
SNCB 59
Diesel locomotive
1954–1955 · 120 km/h

AFB
SNCB 202, 52-54 / CFL 1600
Diesel locomotive
1955–1957 · 120 km/h

Bombardier
DE-AC33C
Diesel locomotive
2003 · 120 km/h

CRRC Qingdao Sifang
DFH3
Diesel locomotive
1971–1988 · 120 km/h

CZ LOKO
744.0
Diesel locomotive
120 km/h

GE
ES40ACi
Diesel locomotive
2009 · 120 km/h

LKM
V 118.6
Diesel locomotive
1966–1970 · 120 km/h