1209 series double row self-aligning ball bearing

Self-aligning ball bearings have a common sphered raceway in the outer ring. This feature allows angular misalignment of the shaft relative to the housing. Therefore self-aligning ball bearings are particularly used in case of bearings where misalignment can occur from errors in mounting or from shaft bending. Double row self-aligning ball bearings are manufactured both with cylindrical bore and tapered bore (taper 1:12). Self-aligning bearings with tapered bore can be delivered, at request, with adapter sleeves.  

1209 Self Aligning Ball Bearing has a spherical outer ring raceway, the balls and cage continue to rotate, this type of bearings is suitable when the displacement of the centers around which the shaft and housing rotate and shaft deflection are likely to occur.Bearing is made of Chrome Steel.

• Item: 1209 Ball Bearing
• Type: Self Aligning Bearing
• Dimensions: 45mm x 85mm x19mm/Metric
• Inner Diameter: 45mm
• Outer Diameter: 85mm
• Width: 19mm
• Size: 45 x 85 x 19 mm
• Quantity: One Bearing
• Dynamic load rating C: 21.82kN
• Static load rating Co: 7.37kN
• Limiting Speed:
• Grease Lubrication: 7500 RPM
• Oil Lubrication: 9000 RPM

Product Features and Benefits:

• High quality Steel - Ultra clean steel to extend bearing life by up to 80%.
• Pressed steel and polyamide cages available.
• Advanced Grease Technology - CLUNT lubricants that can extend grease life and performance.
• High Grade Balls - Quiet and smooth operation even at high speed.
• Super Finished Raceways - Specially honed to minimise noise and improve lubricant distribution and life.
• Sealed versions available

Dynamic misalignment of up to 7 degree can be accomodated.

Self aligning ball bearings are suitable for applications where misalignment can arise from errors in mounting or shaft deflection. The steel balls, cage, and inner ring can rotate freely at a certain angle, as it is stated that the bearings have self-aligning features. Accordingly, misalignment of the bearing shaft due to the machining and installation of the shaft and housing will be automatically adjusted.

Characteristics of Self Aligning Ball Bearings

• The self-aligning ball bearing has two rows of balls.
• A common concave sphered raceway in the outer ring.
• The center of whose curvature meets that of the bearing itself, so that the inner ring, balls and cage continue to rotate.
• The self-aligning ball bearing with a tapered bore can be easily fitted on the shaft with an adapter assembly.
• Have the lowest friction of all rolling bearings.
• Run cooler even at high speeds.
• Easy mounting and dismounting.
• The permissible operating speed is not dependent on the common criteria like heat generation or cage stability and strength.

Applications of Self Aligning Ball Bearings

• Self-aligning ball bearings are used for commercial ground shafting applications.
• Since axial load capacity is limited, self-aligning ball bearings are not suitable for applications with heavy axial loads.
• Furthermore, if an adapter is used on the tapered bore of the inner diameter, installation and disassembly are much simpler and for this reason adapters are often used on the equipment with drive shafts.

Series of self-aligning ball bearings