A flanged ball bearing is not truly a different type of bearing.
Just as ball bearings are offered sealed or open they are also available flanged or plain.
The flange is just another option given to the design engineer by the bearing manufacturer.
A flange is an extension or a lip on the outer ring of the bearing designed to aid the mounting and positioning of a bearing in a delicate or problematic application.
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TECHNICAL SPECS
Item:F606 ZZ Flanged Ball Bearing
Type: Deep Groove Ball Bearing
Closures: 2 Metal Shields
Lubrication: Self Lubricated (Grease)
Dimensions: 6 x 17 x 6 mm
ID (inner diameter)/Bore: 6mm
OD (outer diameter): 17mm
Width/Height/thickness: 6mm
Quantity: 10 Bearings
Item:F608 ZZ Flanged Ball Bearing
Type: Deep Groove Ball Bearing
Closures: 2 Metal Shields
Lubrication: Self Lubricated (Grease)
Dimensions: 8 x 22 x 7 mm
ID (inner diameter)/Bore: 8mm
OD (outer diameter): 22mm
Width/Height/thickness:7mm
Quantity: 10 Bearings
Item:F623 ZZ Flanged Ball Bearing
Type: Deep Groove Ball Bearing
Closures: 2 Metal Shields
Lubrication: Self Lubricated (Grease)
Dimensions: 3 x 10 x 4 mm
ID (inner diameter)/Bore: 3mm
OD (outer diameter): 10mm
Width/Height/thickness: 4mm
Quantity: 10 Bearings
Item:F624 ZZ Flanged Ball Bearing
Type: Deep Groove Ball Bearing
Closures: 2 Metal Shields
Lubrication: Self Lubricated (Grease)
Dimensions: 4 x 13 x 5 mm
ID (inner diameter)/Bore: 4mm
OD (outer diameter): 13mm
Width/Height/thickness: 5mm
Quantity: 10 Bearings