BOGIES AND SUSPENSION - South Central Railway

CHAPTER 6 – BOGIES AND SUSPENSION
WAGON MAINTENANCE MANUAL
Page 35 of 121
Sr. Description of
Material
No. item
22. Horn Cheek Steel ST-42-SC or steel class II to specification
No. IS:226 or 2004.
23. Horn Gap stiffener Steel 42 W to IS: 2062
24. Packing behind
Sole plate
Steel 42 WC to specification No. IS: 2062
25. Centre Spring 8 mm thick steel plate of specification No. IS
Hanger Bracket 3747
26. Ferrule Steel 42 WC to specification No. IS: 2062
27. Bush Steel class iv to specification No. IRS:M4.
603. CAST STEEL BOGIE
The cast steel bogies are used in BOB wagons.
A. GENERAL DESCRIPTION
The two side frames of cast steel are joined together by a spring plank,
which is riveted to the side frames. The floating bolster rests on the nest of
springs at either end of the spring plank. The load of the wagon is transferred
through centre pivot to the floating bolster and then to the two side frames
through the bearing springs. These bogies have thus only secondary
suspension.
B. CONSTRUCTIONAL DETAILS
The bogie consists of the following main sub assemblies:
a. Cast steel side frame
b. Spring plank
c. Cast steel floating bogie bolster
d. Bogie centre pivot bottom
e. Bogie side bearer (Top& bottom)
f. Spring nest assembly
g. Spring plate
h. Axle box with side frame
a) CAST STEEL SIDE FRAME
Two side frames are required for each trolley. These act as sole bars in
the trolley frame. Both are connected together by a spring plank. The spring
plank keeps the two side frames at fixed distance as required in design and
three together form the letter “H”. The spring plank also keeps the two side
frames parallel to each other and ensures squareness of the trolley.