The use of roller bearings on the fan market ranges from small consumer products to large, industrial ventilation of mines, tunnels or processing plants. The ever growing requirements for process reliability using heat recovery technology is also causing the demand for dependability to rise. Vibrations due to imbalances pose a significant challenge. Other challenges include classic installation problems with housing bearings due to adapter sleeves that affect the bearing clearance and radial runout accuracy of the bearing. Bearings that are also directly exposed to the flow of air require excellent sealing technology to protect against penetrating dirt and leaking lubricant. In tunnel construction and mining in particular, high-temperature resistance is necessary in order to guarantee emergency running properties in the event of a fire.
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