Component: Cup
Width - Millimeter: 15.875
Flange Outside Diameter - Millimeter: 0
Inch - Metric: Inch
Outside Diameter - Inch: 12.75

Flange Outside Diameter - Inch: 0
Outside Diameter - Millimeter: 323.85
Global Part Number GPN: 646942
Precision Class: Standard
Basic Number: 29820

Component: Cup
Width - Millimeter: 36.525
Flange Outside Diameter - Millimeter: 0
Inch - Metric: Inch
Outside Diameter - Inch: 12.875

Flange Outside Diameter - Inch: 0
Outside Diameter - Millimeter: 327.025
Bore - Millimeter: 0
Precision Class: Standard
Basic Number: 8520

Component: Assembly
Inch - Metric: Inch
Outside Diameter - Inch: 12.875
Outside Diameter - Millimeter: 327.025
Bore - Millimeter: 241.3

Other Features: 2 Single Cone | 1 Double Cup | Unground Cone Spacer | Outer Race with Oil Holes and Groove
Global Part Number GPN: 660439
Assembly Components: 8578 (2) | 8520CD (1) | X1S-8578 (1)
Basic Number: 8578
Precision Class: Standard

Inch - Metric: Metric
Outside Diameter - Inch: 12.75
Length Thru Bore - Millimeter: 109
Length Thru Bore - Inch: 4.291
Other Features: Single Row | Split Roller | Light Duty

Housing Style: Cartridge Unit
Housing Material: Cast Iron
Mounting Method: Clamp Collar
Rolling Element: Cylindrical Roller Bearing
Expansion / Non-expansion: Expansion

Inch - Metric: Metric
Outside Diameter - Inch: 12.75
Length Thru Bore - Millimeter: 123.8
Length Thru Bore - Inch: 4.874
Other Features: Single Row | Split Roller | Medium Duty

Housing Style: Cartridge Unit
Housing Material: Cast Iron
Mounting Method: Clamp Collar
Rolling Element: Cylindrical Roller Bearing
Expansion / Non-expansion: Non-Expansion