Technical Foundation
What Is a Flangette Bearing?
A flangette (or flange) bearing unit combines a ball or roller bearing insert with a flanged housing bolted directly to a flat mounting surface using two bolt holes, commonly used in pairs on opposite sides of a shaft where a full 4-bolt flange unit would be impractical, such as bolting through a formed channel or angle frame. Split flangette units open along a horizontal seam, allowing the housing to be installed or removed without sliding it off the end of the shaft — useful where the shaft is already assembled with other components on both sides.
The bearing insert typically uses a spherical outer race seated in the housing, giving the unit some self-alignment capability to compensate for minor shaft misalignment without binding, and is locked to the shaft with either a set screw or an eccentric locking collar. Housing material — cast iron for heavier duty and higher load capacity, or stamped/pressed steel for lighter-duty, lower-cost applications — should match the expected load and operating environment.
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| Spec | What It Means | Why It Matters |
|---|---|---|
| Bore Size | Shaft diameter the bearing insert accepts | Must match shaft diameter precisely for correct fit and load transfer |
| Mounting Configuration | 2-bolt flangette vs. 4-bolt flange | Flangettes are used in pairs on narrow mounting surfaces like channel or angle frame |
| Housing Material | Cast iron vs. stamped/pressed steel | Cast iron handles higher loads and shock; stamped steel is lighter-duty and lower cost |
| Locking Method | Set screw vs. eccentric locking collar | Eccentric collars generally provide more secure locking under vibration than set screws |
| Split vs. Solid Housing | Split (two-piece) housing opens along a seam | Split housings allow installation without removing other shaft-mounted components |
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Applications
Where Flangette Bearings Get Used
Flangette bearings are specified anywhere a shaft needs support mounted to a narrow channel, angle, or bracket surface rather than a full flat flange plate.
Conveyor Systems
Flangette bearings supporting idler and drive shafts along conveyor frames in material handling lines.
Agricultural Equipment
Split flangette units supporting shafts on augers, combines, and other farm equipment where field serviceability matters.
Packaging Machinery
Compact flangette units supporting lighter shafts in packaging line rollers and guides.
HVAC Fan & Blower Assemblies
Flangette bearings mounted to fan housing frames to support blower shafts.
General Machine Building
Flangette units used wherever a shaft needs support on a narrow structural mounting surface rather than a flat plate.
Brands
Flangette Bearings Brands in the Catalogue
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FAQ
Flangette Bearings Questions, Answered
What's the difference between a flangette and a full flange bearing unit?
A flangette is a 2-bolt flanged unit typically used in pairs mounted on opposite sides of a shaft along a narrow surface like channel or angle iron, while a full flange unit uses four bolts on a single flat mounting plate — flangettes suit narrower mounting surfaces that a 4-bolt pattern wouldn't fit.
How do I choose between a split and solid flangette housing?
A split housing opens along a horizontal seam, letting you install or service the bearing without sliding it off the end of the shaft — useful when other components are already mounted on the shaft. A solid housing is simpler and often lower cost when the shaft end is accessible during installation.
Should I choose cast iron or stamped steel housing?
Cast iron housings handle higher loads, shock, and vibration better and are the standard for heavier-duty applications; stamped or pressed steel housings are lighter-duty, lower-cost options suited to lighter loads and less demanding service.
What's the benefit of a spherical outer race bearing insert?
The spherical seating between the bearing insert and housing allows a small amount of self-alignment, compensating for minor shaft misalignment during installation or from frame deflection under load, without binding the bearing.
Set screw or eccentric collar locking — which is more secure?
Eccentric locking collars generally hold more securely under vibration and reversing loads than set screws, which can work loose over time, making eccentric collars the preferred choice for higher-vibration applications like conveyors and agricultural equipment.
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