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Rail sleeper pads and clips

Polypropylene pads, injection moulded under high pressure, that sit flat, stay in the sleeper and hold their shape in the heat of underground workings.

Developed from a field problem

A sleeper pad has a simple job, and it fails in simple ways. Pads that warp do not sit flat, and pads that do not sit flat work loose and fall out of the sleepers before they ever reach the rail line.

Our pad was developed through trials with several materials to solve exactly that. The result is a polypropylene pad, moulded in a closed tool, that arrives flat and stays where it is fitted.

Why polypropylene

Chosen through trials for the conditions underground.

  1. Rigid under load

    Polypropylene is stiffer than polyethylene, so the pad resists deforming under the weight and movement of the rail.

  2. Stable when it is hot

    Polyethylene softens at the temperatures found in deep workings, above about 23 °C. Polypropylene keeps its shape.

  3. Less static

    Polypropylene builds up less static charge than polyethylene, a real consideration underground.

  4. Moulds without stress

    It fills the tool cleanly without the internal stress that overpacking causes in polyethylene.

Moulded, not stamped

Many pads on the market are cut or stamped from extruded sheet. Stress locked into the sheet as it cools can make those pads bend, and stamping leaves flash on the edges.

Every Almoguera pad is injection moulded under high pressure in its own cavity. Each one comes out of the tool at the same shape, thickness and weight, batch after batch.

Specification

MaterialPolypropylene (PP)
ProcessInjection moulded
Thickness2.9 mm and 4.8 mm
ColourBlack
TestingIndependently laboratory tested for tensile strength (ASTM D638), Charpy impact (ISO 179‑1), compression set (ISO 815‑1) and static and dynamic stiffness. Test report available on request.
SupplyPacked in bags of 500. Minimum order 1 000 pads.
Almoguera sleeper pads marked 1871 30 KG and 1872 22 KG, shown with two matching clips

Matching sleeper clips

Every pad is held in place by a matching clip, injection moulded in polypropylene in our own facility. One clip goes with each pad, so clips are supplied in the same quantity as the pads you order.

MaterialPolypropylene (PP)
ColourBlack
SupplyOne clip per pad, ordered together with the pads

Need sleeper pads?

Tell us the quantity of pads and clips you need, and we will quote for supply or send samples.

Request a quote
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