Centrifugal Fan Bearing

The bearing is the most maintenance-sensitive component of any centrifugal fan. When a bearing fails, it affects the entire system. This increases shaft vibration, disrupts the balance of the impeller and in extreme cases, permanently damages the entire shaft. Yet fan bearing failures are almost never caused by defective bearings from the factory. The real cause is lubrication breakdown, incorrect re-greasing intervals, residual shaft misalignment, dirt ingress or operation at temperatures for which the grease grade was not selected. Centrifugal Fan Bearings, properly specified in conjunction with shaft diameter, load, operating speed and duty cycle, provide the required design life for the application. According to international industrial standards AMCA 99 and ISO 281, a bearing must be selected so that it can provide a basic rating Life - L10 service of at least 80,000 hours at its maximum operating speed and load. Here L10 life means that at least 90% of the bearings in a group of similar bearings will last this specified time without any problems. This is basically a universal reliability measure under the ISO 281 standard.

For standard centrifugal fans in HVAC and light industrial service, 6200 series deep groove ball bearings cover shaft diameters from 10 mm upwards at medium combined radial and axial loads. The 6300 series is used for carrying more load in medium and heavy fans, which is a step ahead of ordinary bearings. This series with large ball complement and heavy race is a standard choice according to catalog specifications. Spherical roller bearings are used if the impeller load, belt pull force or misalignment is beyond the capacity of ordinary ball bearings. Due to its special self-aligning design, it can easily absorb any angular misalignment without putting any stress on the outer race. Tapered roller bearings are mainly selected in machines where radial and axial thrust loads are quite high coupled as vertical shaft fans. Its mounting arrangements come in numerous ways for simplicity of use.For example: solid pillow block for general purposes, split pillow block with labyrinth sealing for high-speed applications or flange-mount for installations where space is at a premium. In terms of sealing, it has the option to choose open (externally lubricated), ZZ (metal shielded), and 2RS (rubber contact sealed), pre-greased for contaminated environments. Also, each Centrifugal Fan Bearing is purchased from approved top brands only, assuring full traceability in dimensions.

• 6200 series deep groove ball bearing - HVAC and general duty fans
• 6300 series deep groove ball bearing - medium and heavy industrial fans
• Spherical roller bearing - self-aligning; heavy industrial; ID/FD fans
• Tapered roller bearing - high combined radial + axial thrust applications
• Pillow block (solid / split housing) and flange-mount housings available
• Seal options: Open / ZZ (metal shield) / 2RS (rubber seal - pre-greased)

Available Brands: Available prestigious international and national top brand. Such as SKF / FAG (Schaeffler) / NSK / NTN / Timken / Equivalent - per application

To order: Contact us with your fan model, shaft diameter (mm), operating RPM, and motor kW - or provide the existing bearing number directly for direct replacement.