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PartsTable / COMPONENT / 77R2XR1MILG3278A
77R2XR1MILG3278A ✓ 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 OVERALL, bore_shape: STRAIGHT, bore_diameter: 0.1250 INCHES NOMINAL IN, overall_width: 0.1563 INCHES NOMINAL IN, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-554-2928, 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
77R2XR1MILG3278A
NSN: 3110-00-554-2928
FSC: 3110
CAGE: 43334 — GENERAL MOTORS CORP DELCO MORAINE NDH DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter0.1250 INCHES NOMINAL IN
overall_width0.1563 INCHES NOMINAL IN
load_directionRADIAL
surface_finishGROUND
shield_quantity2
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
lubrication_materialGREASE
overall_outside_diameter0.3750 INCHES NOMINAL IN
internal_fit-up_designationSTANDARD
retainer_fabrication_methodPRESSED
NSN3110-00-554-2928
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 77R2XR1MILG3278A · 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
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
RETAINER FABRICATION METHOD: PRESSED
•
SURFACE FINISH: GROUND
•
LOAD DIRECTION: RADIAL
•
BORE SHAPE: STRAIGHT
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.1
•
SHIELD QUANTITY: 2
TECHNICAL CHARACTERISTICS (FLIS)
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
INTERNAL FIT-UP DESIGNATIONSTANDARD
RETAINER FABRICATION METHODPRESSED
SURFACE FINISHGROUND
LOAD DIRECTIONRADIAL
BORE SHAPESTRAIGHT
STANDARD TOLERANCE DESIGNATIONABEC NO.1
SHIELD QUANTITY2
LUBRICATION MATERIALGREASE
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
GGG-D-751 TYEInterchangeable
interchangeable cross-reference
interchangeable
940 3/8Interchangeable
interchangeable cross-reference
interchangeable
1302Interchangeable
interchangeable cross-reference
interchangeable
YC9AFInterchangeable
interchangeable cross-reference
interchangeable
55955Interchangeable
interchangeable cross-reference
interchangeable
53128Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 77R2XR1MILG3278A?
77R2XR1MILG3278A is a BEARING,BALL,ANNULAR.
What parts can replace 77R2XR1MILG3278A?
There are 28 known substitutes for 77R2XR1MILG3278A: GGG-D-751 TYE, 940 3/8, 1302 and 25 more. Substitute compatibility should be verified for your specific system.
Is 77R2XR1MILG3278A still available?
77R2XR1MILG3278A 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