JNR Class EF66

Specifications
Specifications
Configuration:;
• AAR	B-B-B
• UIC	Bo′Bo′Bo′
• Commonwealth	Bo-Bo-Bo
Gauge	1,067 mm (3 ft 6 in)
Bogies	DT133A (outer), DT134A (centre)
Wheel diameter	1,120 mm (44.09 in)
Length	18,200 mm (59 ft 8+1⁄2 in)
Width	2,800 mm (9 ft 2+1⁄4 in)
Height	4,200 mm (13 ft 9+3⁄8 in)
Loco weight	100.8 tonnes (99.2 long tons; 111.1 short tons)
Electric system/s	1,500 V DC overhead lines
Current pickup(s)	Pantograph
Traction motors	DC motors (MT56) (x6)
Transmission	Single-stage reduction gear (20:71), flexible quill drive

Type and origin
Type and origin
Builder	Kawasaki Sharyo, Kawasaki Heavy Industries, Kisha Seizo, Toshiba
Total produced	89

Class EF66
Class EF66
	JR West EF66 42 in March 2005
Builder
Type and origin
Builder	Kawasaki Sharyo, Kawasaki Heavy Industries, Kisha Seizo, Toshiba
Total produced	89
Configuration:;
Specifications
Configuration:;
• AAR	B-B-B
• UIC	Bo′Bo′Bo′
• Commonwealth	Bo-Bo-Bo
Gauge	1,067 mm (3 ft 6 in)
Bogies	DT133A (outer), DT134A (centre)
Wheel diameter	1,120 mm (44.09 in)
Length	18,200 mm (59 ft 8+1⁄2 in)
Width	2,800 mm (9 ft 2+1⁄4 in)
Height	4,200 mm (13 ft 9+3⁄8 in)
Loco weight	100.8 tonnes (99.2 long tons; 111.1 short tons)
Electric system/s	1,500 V DC overhead lines
Current pickup(s)	Pantograph
Traction motors	DC motors (MT56) (x6)
Transmission	Single-stage reduction gear (20:71), flexible quill drive
Maximum speed
Performance figures
Maximum speed	110 km/h (70 mph)
Power output	3.9 MW (5,200 hp)
Tractive effort	192 kN (43,000 lbf)
Operators
Career
Operators	■ JNR; ■ JR West; ■ JR Freight;
Number in class	39 (as of 1 April 2016)
Delivered	1966
Withdrawn	EF66-0 1992–2024(All Units)
Disposition	In service
	This train won the 12th Blue Ribbon Award in 1969.

The Class EF66 (EF66形) is a six-axle, three-bogied (Bo′Bo′Bo′) DC electric locomotive designed for fast freight used by Japanese National Railways (JNR) and later operated by its descendants JR West and JR Freight.^[1] As of 1 April 2016^[update], 39 locomotives remained in service, all operated by JR Freight.^[2]

^ Fujii, Katsuhisa (November 1991), 国鉄最大最強力電機EF66形のすべて [All about Class EF66, the largest and the most powerful electric locomotive of JNR], Japan Railfan Magazine, vol. 31, no. 367, Japan: Koyusha Co., Ltd., p. 8 et seq
^ Miyahara, Masakazu, ed. (December 2016). 国鉄最終章LAST (鉄道ジャーナル2017年2月号別冊) [JNR – The Final Chapter (Railway Journal February 2017 Extra issue)]. Tetsudō Jānaru (in Japanese). Japan: Railway Journal: 23–27. ASIN B01N59AJPB. ISSN 0288-2337.