What Is the E20 Rail Clip
The E20 rail clip, also known as the E20 track clip or E20 rail fastening clip, is a crucial component used in railway track systems to secure the rails to the baseplates or ties. This rail clip ensures the alignment, stability and safety of the track, helping to prevent any shifting or misalignment caused by dynamic forces and heavy loads from passing trains. It is part of the E-type family of elastic clips, which use the spring action of forged spring steel to clamp the rail foot.
The E-Type Clip Family Parameters
The E-type clip family includes the E18, E18 anti-theft, E19 and E20 models, each specified by its dimensions and performance. The E18 and E18 anti-theft clips have a length of 100 plus or minus 3 mm, heights of 58 and 57 mm respectively, and a diameter of 18 mm. The E19 and E20 clips have the same length, a height of 56.5 mm and a diameter of 20 mm. All clips are made of 60Si2MnA spring steel with a hardness of 44 to 48 HRC, and they must pass a fatigue test of 5,000,000 cycles without breaking.
Clamping Pressure
The clamping pressure of the E18 and E18 anti-theft clips is at least 9.5 kN, while the E19 and E20 clips provide at least 8.25 kN. The clamping pressure is the force that holds the rail foot against the baseplate, and it is set by the clip geometry, the wire diameter and the heat treatment. The pressure is verified at installation and maintained by the elastic action of the clip.
Material and Heat Treatment
The E-type clips are forged from 60Si2MnA spring steel, with the carbon content providing the base strength, the silicon raising the elastic limit and the manganese improving the hardenability. After quenching and tempering, the clips achieve a tensile strength above the required value and the specified hardness range. The forged structure gives the clips the fatigue resistance needed for the dynamic loads of railway service.
Quality and Supply
The clips are produced under a certified quality management system and inspected for dimensions, hardness, surface quality and fatigue performance. They are supplied with the documentation required by the project, and the quality is consistent across large production volumes. The supplier provides technical support for installation and maintenance.
Frequently Asked Questions
What is the function of the E20 clip? The E20 rail clip, also known as the E20 track clip or E20 rail fastening clip, secures the rail to the baseplate or tie, preventing shifting and misalignment and keeping the track gauge stable.
What are the dimensions of the E20 clip? Length 100 plus or minus 3 mm, height 56.5 mm and diameter 20 mm. The E18 and E18 anti-theft models share the same length and use an 18 mm rod diameter.
What is the clamping pressure of the E20 clip? t least 8.25 kN. The E18 and E18 anti-theft clips provide at least 9.5 kN, holding the rail foot firmly against the baseplate.
What hardness do the clips have? 44 to 48 HRC after quenching and tempering of 60Si2MnA spring steel, with the carbon content providing base strength and the silicon raising the elastic limit.
What is the fatigue requirement? 5,000,000 cycles without breaking, verified through fatigue performance inspection under a certified quality management system.
