Cimmco had primarily been since 1957 in the business of Railway
Wagons and Heavy Engineering Projects / Products at Bharatpur
The Company is a Public Limited company in Private Sector having
installed capacity for manufacturing of wagons, coaches,
underframe 2240 Vehicular Units (VUs) and Industrial Machinery
14200 MT per annum and comes under a large Industrial Unit.
The use of finished products like wagon is made for transportation
of freight traffic by Indian Railways across India and close circuit
transportation by some Industrial users like Thermal Power Projects.
The frame of ICF bogie is a fabricated stucture made up of
Suspension is the set of elastic component,dampers and
associated component which connect wheel sets to the car
Suspension usually consist of two stages primary and
Primary suspension connecting the wheel sets to the bogie
Secondary suspension beyween the bogie frame and the
bostler or car body
The bogie carries half the car weight which is then divided roughly
equally between the two axles.
In the primary suspension design, the laminated axle box spring is
fitted with two "spring hangers" attached to the outer ends of the
longest spring plate.
The weight of the bogie on the axle box is transmitted through the
steel laminated spring and the two spring hangers.
Each spring hanger and its associated spring carry 1/16th of the
total car weight.
The secondary suspension of the bogie is mounted crosswise
(transversely) in the centre. It looks as shown below:
The bogie has a pair of transverse members called
“transoms”. They are riveted or welded to the bogie side
frames. A steel "swing link" is hung from each end of each
transom and a spring plank is laid across the bogie between
A side view of the bogie below shows the way the spring plank
is supported by the swing links
The spring plank rests on bearer rods suspended between the
swing links. This arrangement allows the spring plank to rock
from side to side and it will act in opposition to sideways
movement of the bogie frame.
The spring plank, which carries springs, is shown in the below
A pair of steel coil springs (shown in red) rest on each end of
the spring plank. On top of them sits the bogie bolster. The
bolster carries the vehicle body. The body is located by a centre
bearing, using a pin fitted to the under frame of the body and
steadied by two side bearers.
•The bogie consisted of three main parts - the bolster and the two
side frames. The basic arrangement provided for a set of steel coil
springs provided inside an opening in each side frame of the bogie.
•The bogie bolster was mounted on top of these springs and held in
place by guides cast or bolted onto the bolster.
•The axle boxes were not sprung and merely slotted into the frame.
•The second set of springs only comes into contact with the truck
bolster when it is depressed by the extra weight loaded on the vehicle.
•The loaded springs are stiffer than the empty springs so that the
stability is maintained regardless of the load applied.