South African Class 6K 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 in (838 mm)
Wheelbase	50 ft 1 in (15,265 mm)
• Axle spacing; (Asymmetrical)	1-2: 5 ft (1,524 mm); 2-3: 6 ft 8 in (2,032 mm)
• Engine	21 ft 4 in (6,502 mm)
• Leading	6 ft (1,829 mm)
• Coupled	11 ft 8 in (3,556 mm)
• Tender	13 ft 8 in (4,166 mm)
• Tender bogie	4 ft 8 in (1,422 mm)
Length:;
• Over couplers	57 ft 6+1⁄4 in (17,532 mm)
Height	12 ft 6 in (3,810 mm)
Frame type	Bar
Axle load	13 LT 13 cwt (13,870 kg)
• Leading	9 LT (9,144 kg)
• 1st coupled	12 LT 13 cwt (12,850 kg)
• 2nd coupled	13 LT 13 cwt (13,870 kg)
• 3rd coupled	12 LT 18 cwt (13,110 kg)
• Tender bogie	Bogie 1: 15 LT 4 cwt (15,440 kg); Bogie 2: 17 LT 8 cwt (17,680 kg)
Adhesive weight	39 LT 4 cwt (39,830 kg)
Loco weight	48 LT 4 cwt (48,970 kg)
Tender weight	32 LT 12 cwt (33,120 kg)
Total weight	80 LT 16 cwt (82,100 kg)
Tender type	2-axle bogies
Fuel type	Coal
Fuel capacity	5 LT (5.1 t)
Water cap.	3,360 imp gal (15,300 L)
Firebox:
• Type	Round-top
• Grate area	19 sq ft (1.8 m2)
Boiler:;
• Pitch	6 ft 11 in (2,108 mm)
• Diameter	4 ft 10+3⁄4 in (1,492 mm)
• Tube plates	11 ft 10+5⁄8 in (3,623 mm)
• Small tubes	182: 2 in (51 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Pop
Heating surface:
• Firebox	113 sq ft (10.5 m2)
• Tubes	1,195 sq ft (111.0 m2)
• Total surface	1,308 sq ft (121.5 m2)
Cylinders	Two
Cylinder size	17+1⁄2 in (444 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; Baldwin Locomotive Works
Builder	Baldwin Locomotive Works
Serial number	18319-18322, 18348-18353
Model	CGR 6th Class
Build date	1901
Total produced	10

CGR 6th Class 4-6-0 1901 Baldwin
South African Class 6K 4-6-0
CGR 6th Class 4-6-0 1901 Baldwin; South African Class 6K 4-6-0
	Ex CGR 6th Class, SAR Class 6K
Power type
Type and origin
Power type	Steam
Designer	Cape Government Railways; Baldwin Locomotive Works
Builder	Baldwin Locomotive Works
Serial number	18319-18322, 18348-18353
Model	CGR 6th Class
Build date	1901
Total produced	10
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 in (838 mm)
Wheelbase	50 ft 1 in (15,265 mm)
• Axle spacing; (Asymmetrical)	1-2: 5 ft (1,524 mm); 2-3: 6 ft 8 in (2,032 mm)
• Engine	21 ft 4 in (6,502 mm)
• Leading	6 ft (1,829 mm)
• Coupled	11 ft 8 in (3,556 mm)
• Tender	13 ft 8 in (4,166 mm)
• Tender bogie	4 ft 8 in (1,422 mm)
Length:;
• Over couplers	57 ft 6+1⁄4 in (17,532 mm)
Height	12 ft 6 in (3,810 mm)
Frame type	Bar
Axle load	13 LT 13 cwt (13,870 kg)
• Leading	9 LT (9,144 kg)
• 1st coupled	12 LT 13 cwt (12,850 kg)
• 2nd coupled	13 LT 13 cwt (13,870 kg)
• 3rd coupled	12 LT 18 cwt (13,110 kg)
• Tender bogie	Bogie 1: 15 LT 4 cwt (15,440 kg); Bogie 2: 17 LT 8 cwt (17,680 kg)
Adhesive weight	39 LT 4 cwt (39,830 kg)
Loco weight	48 LT 4 cwt (48,970 kg)
Tender weight	32 LT 12 cwt (33,120 kg)
Total weight	80 LT 16 cwt (82,100 kg)
Tender type	2-axle bogies
Fuel type	Coal
Fuel capacity	5 LT (5.1 t)
Water cap.	3,360 imp gal (15,300 L)
Firebox:
• Type	Round-top
• Grate area	19 sq ft (1.8 m2)
Boiler:;
• Pitch	6 ft 11 in (2,108 mm)
• Diameter	4 ft 10+3⁄4 in (1,492 mm)
• Tube plates	11 ft 10+5⁄8 in (3,623 mm)
• Small tubes	182: 2 in (51 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Pop
Heating surface:
• Firebox	113 sq ft (10.5 m2)
• Tubes	1,195 sq ft (111.0 m2)
• Total surface	1,308 sq ft (121.5 m2)
Cylinders	Two
Cylinder size	17+1⁄2 in (444 mm) bore; 26 in (660 mm) stroke
Valve gear	Stephenson
Couplers	Johnston link-and-pin
Tractive effort
Performance figures
Tractive effort	19,910 lbf (88.6 kN) @ 75%
Operators
Career
Operators	Cape Government Railways; South African Railways
Class	CGR 6th Class, SAR Class 6K
Number in class	10
Numbers	CGR 301-305, 795-799; SAR 649-658
Delivered	1901
First run	1901
Withdrawn	1928
	The 2nd coupled axle had flangeless wheels

The South African Railways Class 6K 4-6-0 of 1901 was a steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1901, ten American-built 6th Class bar-framed steam locomotives with a 4-6-0 wheel arrangement 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 6K.