Bogie Bolster Suspension: The bolster rests on the bolster coil .. 2 nos. of lateral shock absorber are being provided in ICF Bogie to be utilized. Roll and it’s Prevention. ❑ Effect of roll on human body. ❖ Type of roll: UCR and LCR. ❑ Prevention not available in ICF bogie. ❑ Anti-Roll bar mechanism in LHB . ICF Bogie – Free download as Powerpoint Presentation .ppt), PDF File .pdf), Text File .txt) or view presentation slides online.

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The brake beam is made from steel pipes and welded at the ends. A BSS pin is lcf in the tubular section in the end portion of the lower spring beam. It provides the cushioning effect.

Axle box springs are placed on the lower spring seat placed on the axle box wing of the axle box housing assembly. However, since there are holes in the guide cap, the oil passes through these holes into the hollow body of the bovie box guide. A bogie bolster is the central section of the bogie that carries the entire botie of a coach’s under frame. They are connected through a pin making it a hinged arrangement. It is not bolted or welded either to the bogie frame or the bogie bolster.

Moreover, the load deflection characteristic of the washers were also not found to be in line with the desired specification. Axle box grease is filled in the axle box housing. A sealing ring is placed near the washer and performs the function of a piston ring. The washers also had to be replaced in the iccf maintenance depots leading to lifting if lowering of coaches. On the top of spring seat, a polymer ring called NFTC ring sits. The brake beam has a typical isosceles triangle shape.


The wheel set assembly consists of two pairs of wheels and axle. Two types of brake heads are used.

The lower spring seat acts as a cylinder and the axle box guide acts as a piston. A brake head is a fabricated structure made up of steel plates welded together. The dashpot arrangement consists of a cylinder lower spring seat and the piston axle box guide. The primary suspension in an ICF coaches is through a dashpot arrangement.

The wheel diameter tread reduces due to brake application as the brake blocks rub against the wheel tread.

This diameter is also not sacrosanct and is changed depending upon the supply position of the wheels. This article needs additional citations for verification. In order to adjust for the difference in the wheel tread, a packing is placed under the flange of the lower spring seat. The lower spring seat plays the role of a cylinder in the dashpot arrangement and is filled with oil.

By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved from ” https: The front cover is bolted by using torque wrench. Modify the dust shield ring by incorporating a rubber component in it in such a manner that it also acts as an oil seal.

The brake head in turn receives the brake block. In order to ensure that the packing ring and the guide ring retain their respective place, a dashpot spring is fixed which applies continuous pressure on the piston ring. Main sub-assemblies of bogie frame viz.

Before fitting the roller bearing, an axle collar is press fitted. The BSS hanger in turn supports the hanger. A homopolymer acetyle washer is placed on the lower end of the axle box guide. However, it must be ensured that the increased diameter of the holes of the guide cap does not lead to less dampening effect.


It is a double Y-shaped member fabricated using steel tubes and sheets. However, in the later modification, the new bogies are being manufactured with the BMBC designs only.

ICF coaches

Increase the hole diameter from 5mm in the guide cap to more than the existing diameter. The top end of the hanger also obgie a similar arrangement.

This helps in dampening the vertical vibrations. Change the dashpot design from the cylinder piston arrangement to hydraulic shock absorbers.

Please help improve this article by ivf citations to reliable sources. A center pivot pin is bolted to the body bolster. Even the old type bogies are being converted into BMBC coaches. It involves 40 meters app. The correct buffer height is obtained by measuring the height of the bolster top surface from the rail level. The roller bearing is pressed after the retraining ring. However, this is practically difficult to maintain in the shop floor of bogie shop.

Railway coaches of India. The bogiw variation in the wheels on the same axle is permitted up to 0.

The retaining ring is made of steel and is a press fit. The rear cover has two main grooves.


The wheels may be cast wheels or forged wheels. The sub assemblies are fabricated from flanges, webs, channels and Ribs by welding process. The collar ensures that the bearing does not move towards the center of the axle. The protective tube has a circular ring over it called the dust shield which prevents the ingress of the dust in the cylinder piston arrangement of the dashpot.

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