Rail insulator, also called railroad insulator, rail insulation, rail nylon insulator, it is installed between steel rail and tie plate, for adjusting rail gauge and electrically insulating railroad rails, rail clips and rail bolts from the interior of a concrete sleeper. Its function is the same as a rail pad, but it is thicker than rail pad. For the high speed or high load train, it is a necessary rail fastener .
Properties of rail insulators
The insulators apply to rails such as 60kg (UIC) rail, 52kg rail, 136RE Rail, 90R, 75R, 50R, 60R etc. The rail insulator is mainly made by injection molding production, and it is mainly composed of Nylon-6 or Nylon-66 with glass filler content 20% to 35% depending on specification. These material are UV stabilized and available in natural color or as per requirement.
The properties of our rail insulators are as follows:
Technical Parameter | Unit | Technical Requirement | Value |
Density | g/cm | 1.3-1.45 | 1.45 |
Tensile Strength | Mpa | ≥170 | 178 |
Elongation | % | ≤4.4 | 4.0 |
Bending Strength | Mpa | ≥250 | 290 |
Impact Strength (No gap) | KJ/m2 | ≥80 | 85 |
Melting Point | ℃ | 250 - 270 | 270 |
Insulation Resistance | Ω | ≥1×108 | 5×108 |
Glass Fiber Content | % | 30-35 | 35 |
Hardness | HRR | ≥110 | 118 |
Benefits: High mechanical strength, heat resistance, wear resistance, high rigidity, size stability.
Packaging: Double-layer woven bag + Free fumigation wooden pallet or according to clients' requirement.
Delivery: Shipment within 35 days upon the receipt of order
Types of rail insulators
We supply E-type rail insulators and guide plates for SKL rail fastening systems and Nabla fastening systems. The material of rail insulator is usually Reinforced Nylon 66 (PA66), with the color white, dark brown or black. Materials and colors can also be customized according to the customers’ requirements.
E-type rail insulators
E-type rail insulators are used in E-clip fastening systems, together with E-clips, rail shoulders and rail pads, whose function is to cushion the passing train’s stress onto the rail and make the rail back to position afterwards, similarly used as a rail pad under the rail track.
Rail Nylon Insulator Data Specifictions
Technical Parameter | Unit | Technical Requirement | Value |
Density | g/cm | 1.3-1.45 | 1.45 |
Tensile Strength | Mpa | ≥170 | 178 |
Elongation | % | ≤4.4 | 4.0 |
Bending Strength | Mpa | ≥250 | 290 |
Impact Strength (No gap) | KJ/m2 | ≥80 | 85 |
Melting Point | ℃ | 250 - 270 | 270 |
Insulation Resistance | Ω | ≥1×108 | 5×108 |
Glass Fiber Content | % | 30-35 | 35 |
Hardness | HRR | ≥110 | 118 |
SKL rail insulators
SKL rail insulators are also called guide plates, used in SKL fastening systems, combined with SKL tension clips, screw spikes, plastic dowels, flat washers and rail pads.
Nabla rail insulators
Nabla rail insulators are used in Nabla clip rail fastening systems, working together with other fastener parts including Nabla clips, screw spikes and spring washers.
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Rail Insulator
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