JNR Class EF10

Class EF10
EF10 18 shortly after completion in 1938
Type and origin Power type Electric Builder Hitachi, Kawasaki Heavy Industries, Kisha Seizo, Mitsubishi, Toshiba Build date 1934–1941 Total produced 41
Specifications Configuration: ​  • UIC (1′Co)+(Co1′) Gauge 1,067 mm (3 ft 6 in) Bogies HT56 Wheel diameter 1,250 mm (49.21 in) Trailing dia. 860 mm (33.86 in) Length: ​  • Over couplers 18,380 mm (60 ft 3+5⁄8 in) Width 2,810 mm (9 ft 2+5⁄8 in) Height 3,940 mm (12 ft 11+1⁄8 in) Loco weight 97.5 t (96.0 long tons; 107.5 short tons) Electric system/s 1,500 V DC overhead line Current pickup(s) Pantograph Transmission 1 stage gear reduction, suspended type
Performance figures Maximum speed 75 km/h (45 mph) Power output 1,350 kW (1,810 hp) Tractive effort 11,700 kgf (26,000 lbf)
Career Operators JNR Number in class 41 Numbers EF10 1 - 41 First run 1934 Preserved 1 Disposition All withdrawn

The Class EF10 (EF10形) is an electric locomotive built for the Japanese Government Railways formerly operated on freight services in Japan from 1934 until 1983.

41 locomotives were built between 1934 and 1941 by the manufacturers Hitachi, Kawasaki Heavy Industries, Kisha Seizo, Mitsubishi, and Toshiba.^[1]

Locomotive construction was divided into four batches, with further differences within individual batches as follows.^[1]

Locomotives EF10 1 to 16 had bodies with similar styling to the Class ED16 and Class EF53 locomotives.^[1]

• 
  EF10 1-16
• 
  A Class ED16 locomotive for comparison

EF10 17 was built in 1937 with a welded body and more rounded styling.^[1]

• 
  EF10 17

Locomotives EF10 18 and 19 continued with the same rounded body styling as EF10 17, but used a similar bar frame bogie design to the first batch of locomotives.^[1]

Locomotives EF10 20 to 24 continued with the same body design, but with a different ventilator arrangement.^[1]

Locomotives EF10 25 to 29 had welded bodies, but reverted to a more angular design.^[1]

Locomotives EF10 30 to 33 continued with the same welded angular body design, but used cast bogie frames.^[1]

• 
  EF10 30-33

Locomotives EF10 34 to 41 used the original bar frame bogie design.^[1]

EF10 35 was preserved in a park in Moji-ku, Kitakyushu before being restored and moved to the newly opened Kyushu Railway History Museum in 2003, where it is preserved statically.^[2]

The EF10 classification for this locomotive type is explained below.

• E: Electric locomotive
• F: Six driving axles
• 10: Locomotive with maximum speed 85 km/h or less

• Railway electrification in Japan

• 鉄道車輌ディテール・ファイル002 ひさし付車体のEF10(1〜16) [Rolling Stock Detail File 002: Sun visor type EF10 (1 to 16)] (in Japanese). Japan: Neko Publishing Co., Ltd. September 2009. ISBN 978-4777052622.
• 鉄道車輌ディテール・ファイル 004: 丸型車体のEf10(17~24) 鉄道車輌ディテール・ファイル004　丸型車体のＥＦ１０（１７～２４） [Rolling Stock Detail File 004: Round-bodied EF10 (17 to 24)] (in Japanese). Japan: Neko Publishing Co., Ltd. November 2009. ISBN 978-4777052707.
• 鉄道車輌ディテール・ファイル007　丸型車体のＥＦ１０（２５～４１） [Rolling Stock Detail File 007: Angular-bodied EF10 (25 to 41)] (in Japanese). Japan: Neko Publishing Co., Ltd. February 2010. ISBN 978-4777052783.