SKF
Supporting Wheel Bearing Selection
Supporting wheels on conveyors, trolleys, and rail-guided vehicles operate under heavy radial loads and low to moderate speeds. SKF’s supporting wheel bearing selection example addresses the unique demands of these applications: high static and dynamic load capacity, shock resistance, and the ability to handle occasional misalignment or edge loading. Deep groove ball bearings, cylindrical roller bearings, or tapered roller bearings can be used depending on the wheel hub design and load levels. The calculation incorporates load factors for track irregularities and dynamic loading during starting and stopping. Execution often includes heavy-duty seals or a combination of seals and shields to prevent ingress of dirt, scale, and moisture. The example ensures that the specified bearing not only survives but delivers consistent reliability in material handling environments.
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High Capacity Bearings
Full-complement cylindrical roller bearings maximize load rating within wheel envelope.
Sealing for Contaminant-Laden Environments
Labyrinth seals and V-ring protectors keep bearings clean.
Shock Load Mitigation
C3 or C4 internal clearance and through-hardened steel rings handle impact.
Extended Grease Life
Grease with high base oil viscosity and EP additives withstands low speeds without starvation.
Easy Mounting Designs
Tapered bore bearings with adapter sleeves allow rapid wheel installation.
Corrosion Protection
Zinc-coated or stainless solutions for outdoor and washdown applications.
Bearing Arrangement for Conveyor Trolley Wheels
A pair of deep groove ball bearings or a single double-row angular contact bearing provides a compact, stiff wheel support. For extremely high radial loads, twin cylindrical roller bearings with thrust washers handle both radial and axial components. The SKF example details fit selection to prevent inner ring rotation on axle.
Lubrication and Sealing for Harsh Supporting Wheel Environments
In iron and steel mills, scale and water are ever-present. SKF recommends high-temperature grease with solid additives and multi-lip sealing. For frequent washdown food applications, stainless steel bearings with H1 food-grade grease and integral seals maintain hygiene and reliability.