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Conversion to the Janney coupling is now virtually complete. Commonwealth Railways started with Janney couplings on its 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge Trans-Australian line, and some railways, like the former Victorian Railways and the Queensland Railways, used dual couplers. Older couplers remain on Heritage railways.
English couplers on 1,676 mm (5 ft 6 in) and on 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge [7] AAR couplers on 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge [7] and some passenger (FIAT 7131 DMUs) and freight rolling stock on standard and broad gauge. Small knuckle coupler with slot in knuckle for link and pin couplers on 750 mm (2 ft 5 + 1 ...
[1] [4] [5] Transition era knuckle coupler. Conversion of all rolling stock would take several years and both coupler types could still be seen on rolling stock into the late 1950s. During the transition period, knuckle couplers on locomotives had a horizontal gap and a vertical hole in the knuckle itself to accommodate a link and a pin ...
From 1927, the SAR began to convert the couplers of its Cape Gauge rolling stock from the Johnston link-and-pin coupling system, which had been in use since the establishment of the Cape Government Railways in 1873, to AAR knuckle couplers. Conversion of all rolling stock was to take three decades and both coupler types could still be seen on ...
2,550 mm (8 ft 4 + 3 ... 99 222 was converted to the normal compensating coupling with central buffer. This conversion can be clearly recognised ... Toggle the table ...
Quick coupling 22 mm (G.54) EN 15202 22 mm 0.866 No thread Quick coupling 24.4 mm (G.58) EN 15202 24.4 mm 1" No thread Quick coupling 24.5 mm (G.55) EN 15202 24.5 mm 1" No thread Quick coupling 24.5 mm (G.60) EN 15202 25.4 mm 1" No thread Quick coupling 27 mm (G.59) EN 15202 27 mm 1.063" No thread Quick coupling 35 mm Jumbo (G.56)
On a standard-gauge railway, the nominal mounting height for the coupler (rail top to coupler center) is 33 inches (838 mm), with a 34 + 1 ⁄ 2 ± 1 inch (876 ± 25 mm) maximum height on empty cars and 31 + 1 ⁄ 2 ± 1 inch (800 ± 25 mm) minimum height on loaded cars.
The main reason for the domestic scales different from international standards is the smaller prototype loading gauge and unusual gauges of Japanese railways: 600 mm (1 ft 11 + 5 ⁄ 8 in), 762 mm (2 ft 6 in) and 1,067 mm (3 ft 6 in) are used, along with standard gauge of 1,435 mm (4 ft 8 + 1 ⁄ 2 in).