Specification:

Dimensions
Bore diameter: 50.8 mm
Outside diameter: 88.9 mm
Width, total: 22.225 mm
Width, inner ring: 22.225 mm
Width, outer ring: 16.513 mm
Contact angle: 12.033 °

Properties
Bearing part: Complete bearing
Number of rows: 1
Locating feature, bearing outer ring: None
Bore type: Cylindrical
Cage: Sheet metal
Arrangement of contact angle (double-row bearing): Not applicable
Matched arrangement: No
Coating: Without
Sealing: Without
Lubricant: None
Relubrication feature: Without

Specifications:

INSIDE DIAMETER (MM): 30MM
OUTSIDE DIAMETER (MM): 62MM
WIDTH (MM): 21.25MM
CAGE TYPE: STEEL
SEALS OR SHIELDS: OPEN TYPE
CLEARANCE: STANDARD
DYNAMIC LOAD RATING (KN): 54.5
STATIC LOAD RATING (KN): 64
GREASE LIMITING SPEED (R/MIN): 6300
OIL LIMITING SPEED (R/MIN): 8400

Specifications:

Inner Cone Code: 25590
Outer Cup Code: 25521
Alternative Product Codes: 25590/25521, 25590/21
Dimensions (Metric): 45.618×83.058×23.812 mm
(Inch): 1.7960×3.2700×0.9375
Inside Diameter (d): 45.618mm /1.7960″
Outside Diameter (D): 83.058mm /3.2700″
Width (T): 23.812mm /0.9375″
Cup Width (C): 19.050mm / 0.7500″
Width (B): 25.400mm / 1.0000″