Rail pads are elastic polyurethane mats which are interposed between steel rails and railway sleepers to protect the sleeper top from wearing and impacting.
What are the different types of railroad pads?
Railroad pads are categorized by material (Rubber, HDPE, EVA, TPEE, Composite/Polyurethane) and design/function (Grooved, Continuous, Discontinuous, Rectangular, Trapezoidal, Clip-On/Bolt-On for heavy machinery) to absorb impact, reduce vibration, prevent sleeper damage, and increase friction, with specific types for high-speed, heavy-haul, or crane applications.
| Raw Material | Rubber, EVA, TPEE, HDPE |
| Standard | UIC, AREMA, TB/T2626-95 |
| Application | 43kg/m, 50kg/m, 60kg/m, 75kg/m,115RE, UIC54, UIC60, S49 |
| Model number | 43-7-7, 43-10-7, 50-7-9, 50-10-9, 60-10-17, 60-12-17 |
| Operating temperature | -50~70 degrees |
| Certificate | MSDS, ROHS, REACH |
| Notes | They should be stored in a clean, ventilated place. Don't be in direct sunlight, and keep away from the heat source and chemical reagent. Don't touch the oil, organic solvent, and other chemicals. Banned exposure. |
How is the design of rail pads different for switch sections?
Rail pads for switch sections (turnouts) differ by needing higher durability, specialized shapes (like studded or grooved) for complex load paths, and often composite materials (dual polymer) to handle intense dynamic forces, noise, and abrasion at frogs and crossings, providing crucial shock absorption where rail geometry changes, unlike simpler, flat pads on tangent track.
Key Design Differences for Switch Rail Pads:
Geometry & Structure:
- Studded/Grooved Designs: Common for switches, these enhance grip, prevent sliding (lateral movement), and improve load distribution in complex pivot areas.
- Complex Shapes: Pads must conform to the unique, often non-uniform areas around the frog (where diverging rails meet) and switch blades, requiring custom-molded or modular designs.
Material & Performance:
- High Resilience Elastomers: Natural or synthetic rubbers with high elasticity to absorb impacts and vibrations from wheels crossing gaps and angled rail sections.
- Dual-Polymer Composites: Combining polymers for superior strength, abrasion resistance, and extended life in high-stress areas of the switch.
- Noise & Vibration Damping: Essential due to the inherently noisy nature of wheels passing over frog gaps, making noise suppression a key design goal.
Load Management:
- Extreme Load Distribution: Switches concentrate heavy forces; pads must spread these loads effectively to protect sleepers (ties) and ballast from rapid deterioration.
- Impact Attenuation: Crucial at the frog, where wheels transition from one rail to another, requiring maximum shock absorption.
How to choose the right type of railway pad?
Choosing the right railway pad involves matching its material, thickness, and hardness to your track's specific needs: high-speed lines need stiff polyurethane for stability, heavy-haul freight needs reinforced rubber for strength, urban lines might use softer pads for noise, and all applications require considering load, speed, temperature, and compatibility with your fastening system for optimal vibration damping and component protection.
As a professional rail fastener manufacturer, GNEE RAIL can produce various types of rubber rail pads with different materials, such as natural rubber, EVA, HDPE and so on. In railway fastening system, rubber rail pads are often installed between the rail tracks and the concrete railway sleepers.