General Railway Products
In addition to specific products for Primary and Secondary suspension systems and bushes, control links and spherical bearings, GMT have developed a wide range of additional products. These products have been developed with our customers and are specific to the railway industry.
GMT Stop Buffers
GMT Buffers can be used for a wide range of applications as a simple stop buffer or to provide overload protection. They are constructed in order to provide ease of assembly/disseasembly.
Various designs are available to including profiled buffers to provide progressive stiffness, buffers with male threads, buffers mounted on plates with fixing holes and special buffers incorporating wear resistant plates.
GMT Couplings
GMT Couplings use rubber bonded products to transmit high torsional moments. An example of a GMT Coupling is the Wedge package coupling, this uses several wedge components.
Due to their construction wedge couplings allow for easy disassembly and a high level of angle adjustment.
GMT Wedge Mounts
GMT wedge mountings offer different stiffness' in three axes due to their construction. Metal interleaves can be added to alter the stiffness for fixed dimensions.
Wedge mountings offer a relatively high load capacity whilst offering a high degree of vibration and noise isolation. In railway applications these parts are ideally suited for mounting engines in “under floor” installations.
GMT Resilient Wheels
GMT Resilient Wheels can provide significant reduction in noise and vibration through the use of rubber between the outer and inner metals. Resilient wheels are used on a variety of Rail projects for example on urban trams. Resilient wheels are available in three main types:
- Bonded rubber discs used in pure shear providing good deflection for small loads (<35KN) generally used on lower speed applications (<50km/hr).
- Rubber blocks used in pure compression providing small deflections (<0.8mm) for high frequency and can be used on higher speed applications.
- Pre-compressed rubber rings
Couplers & Drawgears
GMT Couplers and Drawgears use bonded rubber components, which when installed provide cushioning against both tension and compression forces.
Examples of the rubber components used in couplers and drawgears are spring washers and multi-layer springs:
- Spring washers are individual bonded washers, this allows the stiffness to be altered by adjusting the number of spring washers in the stack.
- Multi-layer springs are fully vulcanised.
