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Japanese National Railways class EF70
Japan | 1961
81 produced
EF70 21 in August 1983 at Toyama
EF70 21 in August 1983 at Toyama
Nobuyuki Nagao

On the Hokuriku main line, a steep tunnel of the same name made it necessary to develop a powerful AC electric locomotive. Its tasks included the haulage of 1,300 tonne freight trains on a one percent incline or of passenger trains with 100 km/h. The solution was the EF70 that had three two-axle bogies and of which 81 were built between 1961 an 1965. In 1968, seven were modified for use on sleeper trains. By 1985, most locomotives had been removed from active service. The official retirement of the last one was in March 1987.

VariantEF70 01-18EF70 19-81
General
Built1961-1965
ManufacturerHitachi, Mitsubishi
Axle configB-B-B 
Gauge3 ft 6 in (Cape gauge)
Dimensions and Weights
Length54 ft 11 7/16 in
Rigid wheelbase9 ft 2 1/4 in
Service weight211,644 lbs
Adhesive weight211,644 lbs
Axle load35,274 lbs
Boiler
VariantEF70 01-18EF70 19-81
Power Plant
Power
Power sourceelectric - AC
Electric system20,000 V 60 Hz
Hourly power3,017 hp (2,250 kW)3,084 hp (2,300 kW)
Top speed62 mph
Starting effort66,094 lbf
Calculated Values
electric locomotive
freight
passenger
last changed: 07/2024
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