Timken 1111

Timken 1111
Timken 1111 as built
Type and origin Power type Steam Builder American Locomotive Company (Alco) Serial number 68056 Build date 1930
Specifications Configuration: ​  • Whyte 4-8-4  • UIC 2′D2′ h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 73 in (1,854 mm) Loco weight Working: 417,500 lb (208.8 ST; 186.4 LT; 189.4 t) Empty: 371,100 lb (185.6 ST; 165.7 LT; 168.3 t) Tender weight Working: 301,000 lb (151 ST; 134 LT; 137 t) Empty: 140,700 lb (70.4 ST; 62.8 LT; 63.8 t) Tender type Class 55E Fuel type Coal Fuel capacity 21 short tons (18.8 long tons; 19.1 t) Water cap. 14,550 US gal (55,100 L; 12,120 imp gal) Firebox: ​  • Grate area 88.3 sq ft (8.20 m2) Boiler pressure 250 lbf/in2 (1.72 MPa) Superheater Type E Cylinders Two, outside Cylinder size 27 in × 30 in (686 mm × 762 mm)
Performance figures Tractive effort Loco: 63,700 lbf (283.35 kN) Booster: 12,800 lbf (56.94 kN) Factor of adh. 4.15
Career Operators Timken Roller Bearing Company Northern Pacific Railroad Class A-1 Number in class 1 Numbers 2626 Nicknames Four Aces Locale regular service in Washington, Idaho and Montana Delivered February 8, 1933 Retired August 4, 1957 Disposition Scrapped

Timken 1111, also called the Timken Four Aces, was a 4-8-4 steam locomotive built in 1930 by American Locomotive Company (Alco) as a demonstration unit for new roller bearings produced by the Timken Roller Bearing Company. It was the first locomotive built with all sealed roller bearings rather than plain bearings or a combination of the two. It was later operated by the Northern Pacific Railroad as their 2626.

Timken attempted to cooperate with Northern Pacific Railroad at the end of the engine's career to preserve it and while the Northern Pacific was willing to cooperate in preserving the engine, the attempt ultimately failed and the engine was scrapped in 1958.^[1]