Bogies – The Rail Motor Society

Rail Motor Bogies

Bogies used on NSW railcars are one of two main types – fabricated or cast. Early bogies were of the fabricated type and as the metal industry casting techniques developed, cast bogie frames came into use. The first cast bogies to be deployed in NSW rail cars were the 2PA (PAA) type used on the Silver City Comet power cars. Cast bogies of the 2PE (PEA) and 2TE (NEA) types were introduced with the 900 Class in 1951, while the 2PG (PGA) and 2TG (NGA) types were introduced with the later members of the 620 Class and were built by A. E. Goodwin Limited. The 1100 Class of 1961 and the 1200 Class of 1972 also featured cast bogies from Bradford Kendall (Bradken). Fabricated bogies made a comeback with the Express Passenger Train (XPT) in 1983. Fabricated bogies have continued in use with the Endeavour/Xplorer and the Hunter Classes.

Construction

The fabricated type bogie has a frame that is constructed of various components (flat bar, plate, angle, channel, section, etc.) and are usually either welded or riveted (or a combination of both) while the cast type has a frame of steel that is cast as a single piece including both side frames, horn cheeks, and the main cross member or bolster. Bogies consist of a number of fixed and moving parts depending upon the construction type.

Bogie Types

2QG Power Bogie

2QG Trailer Bogie

2PB Power Bogie

2PE Power Bogie

2TG Trailer Bogie

PLA Power Bogie

NJA Trailer Bogie

RAIL MOTOR BOGIE CROSS REFERENCE TABLE

Old Code	New Code	Bearings	Frame	Primary Susp	Secdry Susp	Equalised	Wheelbase	Wheel Dia.	Builder	Brakes	Class
2AA		Plain	Fabricated	Leaf	Leaf	No	5′ 9″	3′ 0½”		Clasp	320
2AE		Plain	Fabricated	Leaf	Leaf	Yes	6′ 6″	3′ 0½”		Clasp	Vans
2AT		Plain	Fabricated	Coil	Leaf	Yes	6′ 0″	3′ 0½”		Clasp	Vans
2BS	BSA	Roller	Cast	Coil	Coil	Yes	8′ 0″	3′ 1″	Goodwin	Clasp	1181
2PA	PAA	Roller	Cast	Coil	Coil	Yes	7′ 0″	3′ 1″	Bradken	Clasp	100
2PB	PBA	Roller	Fabricated	Coil	Leaf	Yes	6′ 6″	2′ 9″	Morts Dock	Clasp	400
2PC	PCA	Roller	Fabricated	Coil	Coil	Yes	6′ 6″	3′ 1″	Ritchie	Clasp	600
2PE	PEA	Roller	Cast	Coil	Leaf	No	6′ 6″	3′ 1″	Ritchie	Clasp	600 620 900
2PG	PGA	Roller	Cast	Coil	Coil	Yes	6′ 6″	3′ 1″	Goodwin	Clasp	600 620 900
2PH	PHA	Roller	Cast	Coil	Leaf	Yes	8′ 6″	3′ 1″	Bradken	Disc	1100
2PK	PKA	Roller	Cast	Coil	Air bag	No	8′ 6″	3′ 1″	Bradken	Clasp	1200
2QG		Plain	Fabricated	Coil	Leaf	Yes	6′ 6″	2′ 8½”	Eveleigh	Clasp	CPH 38
2QO		Plain	Fabricated	Coil	Leaf	Yes	5′ 6″	2′ 8½”	Eveleigh	Clasp	CPH CTH
2QR		Roller	Fabricated	Coil	Leaf	Yes	6′ 6″	2′ 8½”	Eveleigh	Clasp	CPH
2SG		Plain	Fabricated	Coil	Leaf	Yes	6′ 6″	3′ 1″	Eveleigh	Clasp	38
2TA	NAA	Roller	Fabricated	Coil	Coil	Yes	6′ 6″	2′ 9″	Morts Dock	Clasp	500 551
2TB	NBA	Roller	Fabricated	Coil	Coil	Yes	6′ 6″	3′ 1″	Ritchie	Clasp	700
2TE	NEA	Roller	Cast	Coil	Leaf	No	6′ 6″	3′ 1″	Ritchie	Clasp	700 720 800
2TG	NGA	Roller	Cast	Coil	Coil	Yes	6′ 6″	3′ 1″	Goodwin	Clasp	720 760 800
	NHA	Roller	Fabricated	Coil	Air bag	No	8′ 6″	3′ 1″	Comeng	Disc	XPT Trailer
	NJA	Roller	Fabricated	Coil	Air bag	No	7′ 10½”	3′ 1″	ABB	Disc	End & Xplorer
	NKA	Roller	Fabricated	Conical bonded rubber	Air bag	No	8′ 6″	3′ 1″	United Group	Disc	Hunter
	NMA	Roller	Fabricated	Coil	Air bag	No	7′ 10½”	3′ 1″	ABB	Disc	XPT Trailer
	PJA	Roller	Fabricated	Coil	Air bag	No	7′ 10½”	3′ 1″	ABB	Disc	End & Xplorer
	PKA	Roller	Fabricated	Conical bonded rubber	Air bag	No	8′ 6″	3′ 1″	United Group	Disc	Hunter
	PLA	Roller	Fabricated	Coil	Coil	No	8′ 6″	3′ 4″	Comeng & ABB	Disc	XP
Diamond Frame		Plain	Fabricated	Coil	Leaf	No	4′ 3″	2′ 0½”	Eveleigh	None	No.1
G		Plain	Fabricated	Coil	Leaf	No	5′ 6″		Hudson	Clasp	CTH
Inside Axle box		Plain	Fabricated	Coil	Coil	Yes	6′ 6″	2′ 1″ & 2′ 8½”	Eveleigh	Clasp	CPH
		Plain	Fabricated	Coil	Leaf	No	7′ 0″	3′ 1″	Eveleigh	Clasp	No.2

REFERENCES

“Rail Motors and XPTs” by David Cooke (Australian Railway Historical Society – 1984)
“NSW Passenger Bogies” by David Cooke (Unpublished paper – 2001)
Drawing by U.S. Army and Bruce Agland
Photographs by Bruce Agland
Wikipedia Bogie Article