ICF Bogie

ICF Bogie is a conventional railway bogie used on the majority of Indian Railway main line passenger coaches. The design of the bogie was developed by ICF (Integral Coach Factory), Perambur, Chennai, India in collaboration with the Swiss Car & Elevator Manufacturing Co., Schlieren, Switzerland in the 1950s. The design is also called the Schlieren design based on the location of the Swiss company.

The bogie can be divided into various subsections for easy understanding as follows:

The frame of the ICF bogie is a fabricated structure made up of mild steel. Main sub-assemblies of bogie frame viz. side frames, transoms, headstocks, longitudinal forms the skeleton of the bogie frame. The sub assemblies are fabricated from flanges, webs, channels and Ribs by welding process. Various types of brackets are welded to the frame for the purpose of primary and secondary suspension arrangement, alternator suspension arrangement and brake rigging arrangement. Various brackets viz. brake hanger brackets, brake lever hanger brackets, brake cylinder fixing brackets, anchor link brackets, bolster spring suspension brackets, alternator suspension brackets, belt tensioning bracket/s, axle box guides, suspension straps are welded on the bogie frames. It involves 40 meters (app.) of welding in a single conventional bogie frame. Based on load carrying capacity per axle, the conventional bogie frames are grouped in to two types. They are 13 ton bogie frame and 16 ton bogie frame. 13 ton bogie frames are being used in the bogies of all non-AC mainline coaches and 16 ton bogie frames are being used in bogies of all AC coaches, power cars and diesel multiple unit trailer coaches.

EMU Motor Coach type bogie frames, a different design of bogie frame is being used in all coaches of Electric Multiple Units (EMU) and all self-propelled coaches (motor coaches

A bogie bolster is the central section of the bogie that carries the entire weight of a coach's under frame. The bogie pivots around it using the center pivot pin. It couples to the bogie frame at each end using the secondary suspension system (typically coil springs and spring plank).

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