Knowledge

Compression set resistance is a core durability indicator for rail pads. National standards require that rubber pads, at 70℃ and a 25% compression rat

The thread accuracy of rail bolts (e.g., 6g/6H) directly affects the meshing quality of the threaded pair; insufficient accuracy leads to uneven threa

The material of the fishplate must be precisely matched with the rail material, track axle load, and speed rating. Commonly used materials include Q23

Commonly used anti-corrosion coatings for elastic clips include hot-dip galvanizing, Dacromet coating, and zinc-aluminum coating. Different coatings e

The rail head profile (such as the Chinese national standard CN60, international standard UIC60, and North American TG curve) must be precisely matche

Excessive lateral (side) wear of the rail head is a direct safety hazard: it destroys the wheel-rail guidance geometry, shrinks the contact area betwe

The pressure plate carries the rail base and transmits clamping and lateral forces, so its fatigue resistance decides how long the fastening system ho

The Shore hardness of rail pads is a key indicator for measuring their elastic properties. The standard hardness for rubber pads is Shore A 55°±5°, an

Rail spike embedment depth is a core parameter for sleeper anchorage. The standard embedment depth for resin rail spikes on concrete sleepers is 160mm

The fishplate (joint bar) transfers bending moment across a rail joint through bolt clamping friction, so the position accuracy of its bolt holes dire

The installation angle of an elastic clip refers to the contact angle between the clip's limb and the lower jaw of the rail head. The standard install

The fatigue life of a spring clip is highly dependent on the installation preload. Insufficient preload leads to loosening, while excessive preload re