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Technical Data Sheet
PartsTable / COMPONENT / SSRS77R8XR5MILG3278
SSRS77R8XR5MILG3278 ✓ 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,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, bore_shape: STRAIGHT, bore_diameter: 0.5000 INCHES NOMINAL IN, overall_width: 0.3125 INCHES NOMINAL IN, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-198-2930, 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
SSRS77R8XR5MILG3278
NSN: 3110-00-198-2930
FSC: 3110
CAGE: 43334 — GENERAL MOTORS CORP DELCO MORAINE NDH DIV (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
bore_shapeSTRAIGHT
bore_diameter0.5000 INCHES NOMINAL IN
overall_width0.3125 INCHES NOMINAL IN
load_directionRADIAL
surface_finishGROUND
shield_quantity2
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
lubrication_materialGREASE
overall_outside_diameter1.1250 INCHES NOMINAL IN
internal_fit-up_designationSTANDARD
nondefinitive_spec/std_data115GR50 TYPE
NSN3110-00-198-2930
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: SSRS77R8XR5MILG3278 · 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
•
NONDEFINITIVE SPEC/STD DATA: 115GR50 TYPE
•
LOAD DIRECTION: RADIAL
•
SHIELD QUANTITY: 2
•
BORE SHAPE: STRAIGHT
•
RETAINER FABRICATION METHOD: PRESSED
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA115GR50 TYPE
LOAD DIRECTIONRADIAL
SHIELD QUANTITY2
BORE SHAPESTRAIGHT
RETAINER FABRICATION METHODPRESSED
BORE SHAPESTRAIGHT
SHIELD QUANTITY2
LOAD DIRECTIONRADIAL
LUBRICATION MATERIALGREASE
STANDARD TOLERANCE DESIGNATIONABEC NO.5
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
511723Interchangeable
interchangeable cross-reference
interchangeable
309861Interchangeable
interchangeable cross-reference
interchangeable
713487Interchangeable
interchangeable cross-reference
interchangeable
R8FFMSTInterchangeable
Same NIIN cross-reference
interchangeable
SSRS77R8ZC5MILG3278Interchangeable
Same NIIN cross-reference
interchangeable
SS77R8X5EInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SSRS77R8XR5MILG3278?
SSRS77R8XR5MILG3278 is a BEARING,BALL,ANNULAR.
What parts can replace SSRS77R8XR5MILG3278?
There are 8 known substitutes for SSRS77R8XR5MILG3278: 511723, 309861, 713487 and 5 more. Substitute compatibility should be verified for your specific system.
Is SSRS77R8XR5MILG3278 still available?
SSRS77R8XR5MILG3278 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: July 2026