February 20, 2018
Plain Bearings for Aerospace Applications Article
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AT A GLANCE
Railroad and tramway vehicles require heavy-duty bearings that can withstand harsh operating and environmental conditions. Thanks to their high load capacity, low friction, large operating temperature range, and resistance to both corrosive conditions and contamination, GGB self-lubricating plain bearings are ideal for helping to reduce noise and vibration, increase energy efficiency, and extend maintenance intervals.
GGB understands the challenges facing the railway industry today. Tight budgets, the need to cut energy costs and demands for greener fleets all compete with passengers’ expectations for on-time service and a comfortable, pleasant travel experience.
Worn bearings can lead to unforeseen vehicle maintenance downtime, excessive noise, and increased vibration—all of which contribute to lower passenger satisfaction and decreased profitability. In addition, worn bearings reduce vehicle efficiency, resulting in increased energy consumption and carbon emissions (for diesel vehicles).
Premature and excessive rail bearing wear can be caused by several factors. Extreme weather, low or high temperatures, corrosion, contamination and high loads and shocks, among other factors, can greatly affect the bearing performance, especially if they are not resistant to such conditions.
Upgrading your current bearings to high performance bearings that are built for demanding environments is an economical way to help prevent the problems associated with worn bearings. Our fiber reinforced composite (FRC) bearings have proven themselves to be a superior replacement to traditional metal bearings in terms of durability, corrosion resistance and performance in a wide of rail bearing applications. Metal-polymer bearings, such as DP4®, and engineered plastic (EP) bearings are lightweight, durable solutions for interiors, hinges, ramps and pantographs.
Here are just some of the applications in which our railway technology is used:
SoundTransit has been providing rail commuter services for Seattle since 1993. As its vehicles aged, the company found that the metal pivot pin and wear plate located in the bogies of its vehicles emitted a distracting amount of noise for its passengers during transit. GGB designed a rail bearing solution utilizing an HPMB® king pin plain bearing and HPF® flat sliding bearing that eliminated noise emissions.
Holding Graz Linien in Austria does maintenance on the tramway vehicles in Graz, Austria. Seeking a pin joint solution that resulted in smooth, maintenance-free, long-lasting operation with zero noise emissions, Holding Graz Linien turned to GGB. Our engineering team designed a solution that incorporated GAR-MAX® plain bearings and HPF® flat sliding bearing segments to satisfiy their requirements. It is now being used for all their pin joint restorations.
GGB railway bearings provide a wide range of benefits to help keep your vehicles on the tracks longer:
Low Friction with High Wear Resistance
Lower System Cost
Corrosion and Temperature Resistance
Not all applications require the high load capability of GGB heavy-duty bearings. For lighter load applications, such as windshield wipers or seat hinges, thermoplastic engineered plastic bearings provide a cost-effective solution without compromising on quality.
In dry and lubricated operating conditions, engineered plastic plain bearings have excellent wear resistance, low friction, low thermal expansion and corrosion resistance - all at a very good price-to-performance ratio.
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