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Technical Data Sheet
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OR308 AND RA308 — Technical Data Sheet

✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The BEARING,ROLLER,JOURNAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 2.0000 INCHES NOMINAL IN, overall_width: 1.4375 INCHES NOMINAL IN, special_features: OIL HOLE IN OUTER RING, style_designator: SOLID OUTER RACE, NO INNER RACE, overall_outside_diameter: 90.0 MILLIMETERS NOMINAL MM. This part is cataloged in the Federal Logistics Information System under NSN 3110-00-108-7788, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
OR308 AND RA308
NSN: 3110-00-108-7788
FSC: 3110
CAGE: 51588 — RBC BEARINGS INCORPORATED DIV WEST TRENTON DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter2.0000 INCHES NOMINAL IN
overall_width1.4375 INCHES NOMINAL IN
special_featuresOIL HOLE IN OUTER RING
style_designatorSOLID OUTER RACE, NO INNER RACE
overall_outside_diameter90.0 MILLIMETERS NOMINAL MM
standard_tolerance_designationAFBMA STD TOLERANCES FOR JOURNAL BEARINGS
NSN3110-00-108-7788
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: OR308 AND RA308 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OVERALL OUTSIDE DIAMETER: 90.0 MILLIMETERS NOMINAL MM
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: SOLID OUTER RACE, NO INNER RACE
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCES FOR JOURNAL BEARINGS
•
BORE DIAMETER: 2.0000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL OUTSIDE DIAMETER90.0 MILLIMETERS NOMINAL MM
MATERIALSTEEL OVERALL
STYLE DESIGNATORSOLID OUTER RACE, NO INNER RACE
OVERALL WIDTH1.4375 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCES FOR JOURNAL BEARINGS
BORE DIAMETER2.0000 INCHES NOMINAL IN
SPECIAL FEATURESOIL HOLE IN OUTER RING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
31360-1REVDInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
31360InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
50A1200-3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
318M0016P001InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
63125InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
9995232InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is OR308 AND RA308?
OR308 AND RA308 is a BEARING,ROLLER,JOURNAL.
What parts can replace OR308 AND RA308?
There are 15 known substitutes for OR308 AND RA308: 31360-1REVD, 31360, 50A1200-3 and 12 more. Substitute compatibility should be verified for your specific system.
Is OR308 AND RA308 still available?
OR308 AND RA308 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026