16004 Bearing 20x42x8mm ABEC-7 Bicycle Bearing This UCF209 is a four-bolt

This UCF209 is a four-bolt mounted bearing unit with a 45mm shaft diameter

the innerdiameter(bore) is 1/2" inch dimensions with steelretainer

000 RPM (oil)

120mm x 180mm x 28mm

16004 Bearing 20x42x8mm ABEC-7 Bicycle Bearing This UCF209 is a four-bolt16004 Open Bearing 20mm x 42mm x 8mm 1 Ball Bearing 16004 Open Ball bearing, inner diameter is 20mm, outer diameter is 42mm and width is 8mm, made from durable 52100 alloy steel, commonly known as chrome steel. 16004 Ball bearing Deep groove ball bearing Closures: Open Dimensions: 20mm x 42mm x 8mm Metric ID (inner diameter) Bore: 20mm OD (outer diameter): 42mm Width: 8mm Size: 20 x 42 x 8 mm Quantity: 1 Bearing Dynamic load rating Cr: 7,900 N Static