SKF
Flanged Roller Bearing Units
Flanged roller bearing units feature a spherical roller or CARB bearing in a cast iron or steel housing with a flange face and bolt holes. SKF’s FNL series flanged housings are designed for shaft diameters from medium to large, supporting heavy radial loads where the bearing must mount perpendicular to the machine frame. Common applications include large mixer shafts, process vessels, wind turbine pitch and yaw drives, and marine thrust blocks. The split housing design simplifies mounting and inspection. Flanged units provide high rigidity against tilting moments and can be supplied with a wide range of seals. They combine the alignment advantages of spherical roller bearings with the installation flexibility of flange mounting.
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Flange Mounting for Heavy Loads
Supports cantilever and through-shaft loads.
Spherical Roller Self-Alignment
Handles angular errors without capacity loss.
Split Housing Access
Quick bearing replacement without removing connected equipment.
Robust Material
Spheroidal graphite iron or cast steel for impact resistance.
High-Strength Bolt Patterns
Designed for demanding dynamic moments.
Grease and Oil Lubrication Options
Matching the speed and heat demands of the application.
FNL Series Applications in Wind Turbines
Pitch and yaw bearings in wind turbines sometimes use FNL-style flanged units to support the drive systems. These units withstand extreme weather exposure and the need for high reliability with minimal maintenance, matching turbine design life targets.
Integrating Flanged Units in Mixer and Agitator Shafts
Vertical mixer shafts impose combined radial and axial loads. An FNL flanged unit at the lower support resists the radial impeller forces while allowing the spherical bearing to align with the shaft. This prevents binding and reduces gearbox stress.