In need of a quicker solution, ADL called on SKF, which dispatched a team of application engineers to the bus manufacturer’s headquarters to discuss possible solutions. Taking into account the loads, speeds, operating conditions and required life expectancy, the SKF team applied its proprietary engineering tools, including the Bearing Beacon 3D modeling system, to create a suitable system design and select appropriate components. The full design was then modeled using industry-leading Creo CAD software and handed to ADL for approval.
To meet the client’s need for quiet, efficient operation and a long service life, SKF based the design on its SKF Explorer deep groove ball bearings. These bearings feature an innovative design of advanced, high-purity steel, with a homogenized structure and superior finish on all contact faces. This is combined with an optimized design of the ball and cage assembly. As a result, SKF Explorer bearings reduce friction by some 50 percent, leading to lower levels of heat and noise to give a basic rating life that is 15 percent better than standard designs.
Our partnership with SKF helped us meet a tricky engineering challenge.
Kate Lebedeva, head of North American Sourcing at ADL
Each bearing is protected from the ingress of contaminants by SKF’s V-ring seals. These are easy to install, with a simple interference fit on the shaft, sealing axially against the bearing outer ring side face. The seals provide high levels of abrasion resistance, plus excellent compatibility with a range of oils and chemicals.
The bearings are lubricated with SKF heavy-load, extreme-pressure, wide-temperature-range bearing grease LGWA 2. This premium-quality mineral oil-based, lithium complex grease is specifically designed for industrial and automotive applications where loads or temperatures may exceed the capabilities of general-purpose greases. LWGA 2 grease can handle temperatures of up to 220ºC (428ºF) for short periods; in addition, it offers excellent water and corrosion resistance with effective lubrication in wet conditions and has superior performance at heavy loads and low speeds.