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Technical Data Sheet
PartsTable / COMPONENT / 77038MR1E
77038MR1E ✓ 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: 8.00 MILLIMETERS NOMINAL MM, overall_width: 7.0 MILLIMETERS NOMINAL MM, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-227-4228, 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
77038MR1E
NSN: 3110-00-227-4228
FSC: 3110
CAGE: 43334 — GENERAL MOTORS CORP DELCO MORAINE NDH DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter8.00 MILLIMETERS NOMINAL MM
overall_width7.0 MILLIMETERS NOMINAL MM
load_directionRADIAL
surface_finishGROUND
shield_quantity2
special_featuresNOISE TESTED-ELECT MOTOR QUAALITY SPECIFIED LUBRICANT 0.239 TO 0.388 GRAMS G
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
internal_clearance0.0001 INCHES MINIMUM RADIAL AND 0.0004 INCHES MAXIMUM RADIAL IN
lubrication_materialGREASE
overall_outside_diameter22.00 MILLIMETERS NOMINAL MM
NSN3110-00-227-4228
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 77038MR1E · 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
•
INTERNAL CLEARANCE: 0.0001 INCHES MINIMUM RADIAL AND 0.0004 INCHES MAXIMUM RADIAL IN
•
LUBRICATION MATERIAL: GREASE
•
RETAINER FABRICATION METHOD: PRESSED
•
SHIELD QUANTITY: 2
•
SURFACE FINISH: GROUND
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
•
BORE SHAPE: STRAIGHT
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL CLEARANCE0.0001 INCHES MINIMUM RADIAL AND 0.0004 INCHES MAXIMUM RADIAL IN
LUBRICATION MATERIALGREASE
RETAINER FABRICATION METHODPRESSED
SHIELD QUANTITY2
SURFACE FINISHGROUND
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
SPECIAL FEATURESNOISE TESTED-ELECT MOTOR QUAALITY SPECIFIED LUBRICANT 0.239 TO 0.388 GRAMS G
BORE SHAPESTRAIGHT
LOAD DIRECTIONRADIAL
STANDARD TOLERANCE DESIGNATIONABEC NO.1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
B16.15Interchangeable
interchangeable cross-reference
interchangeable
MS51847-5Interchangeable
interchangeable cross-reference
interchangeable
LA1134-4Interchangeable
interchangeable cross-reference
interchangeable
8457-2Interchangeable
interchangeable cross-reference
interchangeable
77038MR1CJInterchangeable
Same NIIN cross-reference
interchangeable
77038MR1MILG3278Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 77038MR1E?
77038MR1E is a BEARING,BALL,ANNULAR.
What parts can replace 77038MR1E?
There are 11 known substitutes for 77038MR1E: B16.15, MS51847-5, LA1134-4 and 8 more. Substitute compatibility should be verified for your specific system.
Is 77038MR1E still available?
77038MR1E 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