South African Class 6F 4-6-0

Specifications
Specifications
Configuration:;
• Whyte	4-6-0 (Tenwheeler)
• UIC	2'Cn2
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	54 in (1,372 mm)
Tender wheels	33+1⁄2 in (851 mm)
Wheelbase	47 ft 2+1⁄2 in (14,389 mm)
• Axle spacing; (Asymmetrical)	1-2: 4 ft 9 in (1,448 mm); 2-3: 6 ft 7 in (2,007 mm)
• Engine	20 ft 8 in (6,299 mm)
• Leading	5 ft 6 in (1,676 mm)
• Coupled	11 ft 4 in (3,454 mm)
• Tender	16 ft 1 in (4,902 mm)
• Tender bogie	4 ft 7 in (1,397 mm)
Length:;
• Over couplers	54 ft 6+5⁄8 in (16,627 mm)
Height	12 ft 10 in (3,912 mm)
Frame type	Bar
Axle load	12 LT 7 cwt (12,550 kg)
• Leading	10 LT 11 cwt (10,720 kg)
• 1st coupled	12 LT 7 cwt (12,550 kg)
• 2nd coupled	12 LT 6 cwt (12,500 kg)
• 3rd coupled	12 LT 7 cwt (12,550 kg)
• Tender bogie	Bogie 1: 17 LT 14 cwt (17,980 kg); Bogie 2: 18 LT 14 cwt (19,000 kg)
Adhesive weight	37 LT (37,590 kg)
Loco weight	47 LT 11 cwt (48,310 kg)
Tender weight	36 LT 8 cwt (36,980 kg)
Total weight	83 LT 19 cwt (85,300 kg)
Tender type	2-axle bogies
Fuel type	Coal
Fuel capacity	6 LT (6.1 t)
Water cap.	2,780 imp gal (12,600 L)
Firebox:
• Type	Round-top
• Grate area	18.75 sq ft (1.742 m2)
Boiler:;
• Pitch	6 ft 9 in (2,057 mm)
• Diameter	4 ft 7 in (1,397 mm)
• Tube plates	11 ft 2+1⁄8 in (3,407 mm)
• Small tubes	182: 2 in (51 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Ramsbottom
Heating surface:
• Firebox	105 sq ft (9.8 m2)
• Tubes	1,065 sq ft (98.9 m2)
• Total surface	1,170 sq ft (109 m2)
Cylinders	Two
Cylinder size	17 in (432 mm) bore; 26 in (660 mm) stroke
Valve gear	Stephenson
Couplers	Johnston link-and-pin

Type and origin
Type and origin
Power type	Steam
Designer	Cape Government Railways; (H.M. Beatty)
Builder	Sharp, Stewart and Company
Serial number	4631–4632
Model	CGR 6th Class
Build date	1900
Total produced	2

CGR 6th Class 4-6-0 1900
South African Class 6F 4-6-0
CGR 6th Class 4-6-0 1900; South African Class 6F 4-6-0
	Ex CGR 6th Class, SAR Class 6F
Power type
Type and origin
Power type	Steam
Designer	Cape Government Railways; (H.M. Beatty)
Builder	Sharp, Stewart and Company
Serial number	4631–4632
Model	CGR 6th Class
Build date	1900
Total produced	2
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0 (Tenwheeler)
• UIC	2'Cn2
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	54 in (1,372 mm)
Tender wheels	33+1⁄2 in (851 mm)
Wheelbase	47 ft 2+1⁄2 in (14,389 mm)
• Axle spacing; (Asymmetrical)	1-2: 4 ft 9 in (1,448 mm); 2-3: 6 ft 7 in (2,007 mm)
• Engine	20 ft 8 in (6,299 mm)
• Leading	5 ft 6 in (1,676 mm)
• Coupled	11 ft 4 in (3,454 mm)
• Tender	16 ft 1 in (4,902 mm)
• Tender bogie	4 ft 7 in (1,397 mm)
Length:;
• Over couplers	54 ft 6+5⁄8 in (16,627 mm)
Height	12 ft 10 in (3,912 mm)
Frame type	Bar
Axle load	12 LT 7 cwt (12,550 kg)
• Leading	10 LT 11 cwt (10,720 kg)
• 1st coupled	12 LT 7 cwt (12,550 kg)
• 2nd coupled	12 LT 6 cwt (12,500 kg)
• 3rd coupled	12 LT 7 cwt (12,550 kg)
• Tender bogie	Bogie 1: 17 LT 14 cwt (17,980 kg); Bogie 2: 18 LT 14 cwt (19,000 kg)
Adhesive weight	37 LT (37,590 kg)
Loco weight	47 LT 11 cwt (48,310 kg)
Tender weight	36 LT 8 cwt (36,980 kg)
Total weight	83 LT 19 cwt (85,300 kg)
Tender type	2-axle bogies
Fuel type	Coal
Fuel capacity	6 LT (6.1 t)
Water cap.	2,780 imp gal (12,600 L)
Firebox:
• Type	Round-top
• Grate area	18.75 sq ft (1.742 m2)
Boiler:;
• Pitch	6 ft 9 in (2,057 mm)
• Diameter	4 ft 7 in (1,397 mm)
• Tube plates	11 ft 2+1⁄8 in (3,407 mm)
• Small tubes	182: 2 in (51 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Ramsbottom
Heating surface:
• Firebox	105 sq ft (9.8 m2)
• Tubes	1,065 sq ft (98.9 m2)
• Total surface	1,170 sq ft (109 m2)
Cylinders	Two
Cylinder size	17 in (432 mm) bore; 26 in (660 mm) stroke
Valve gear	Stephenson
Couplers	Johnston link-and-pin
Tractive effort
Performance figures
Tractive effort	18,780 lbf (83.5 kN) @ 75%
Operators
Career
Operators	Cape Government Railways; South African Railways
Class	CGR 6th Class, SAR Class 6F
Number in class	2
Numbers	CGR 260-261; SAR 604-605
Delivered	1900
First run	1900
Withdrawn	1929

The South African Railways Class 6F 4-6-0 of 1900 was a steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1900, two redesigned 6th Class 4-6-0 steam locomotives were placed in service by the Cape Government Railways. In 1912, when they were assimilated into the South African Railways, they were renumbered and designated Class 6F.