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PartsTable / COMPONENT / R87039XR1MILG3278
R87039XR1MILG3278 ✓ 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: WOOL SEAL, bore_shape: STRAIGHT, bore_diameter: 9.00 MILLIMETERS NOMINAL MM, overall_width: 0.4060 INCHES NOMINAL IN, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-293-9347, 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
R87039XR1MILG3278
NSN: 3110-00-293-9347
FSC: 3110
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialWOOL SEAL
bore_shapeSTRAIGHT
bore_diameter9.00 MILLIMETERS NOMINAL MM
overall_width0.4060 INCHES NOMINAL IN
seal_quantity1
load_directionRADIAL
surface_finishGROUND
shield_quantity1
inner_ring_width0.3860 INCHES NOMINAL IN
outer_ring_width0.3150 INCHES NOMINAL IN
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
bearing_seal_typeLABYRINTH
NSN3110-00-293-9347
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: R87039XR1MILG3278 · 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
•
MATERIAL: WOOL SEAL
•
INNER RING WIDTH: 0.3860 INCHES NOMINAL IN
•
BORE SHAPE: STRAIGHT
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
OUTER RING WIDTH: 0.3150 INCHES NOMINAL IN
•
LOAD DIRECTION: RADIAL
•
BEARING SEAL TYPE: LABYRINTH
•
LUBRICATION MATERIAL: GREASE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALWOOL SEAL
INNER RING WIDTH0.3860 INCHES NOMINAL IN
BORE SHAPESTRAIGHT
INTERNAL FIT-UP DESIGNATIONSTANDARD
OUTER RING WIDTH0.3150 INCHES NOMINAL IN
LOAD DIRECTIONRADIAL
BEARING SEAL TYPELABYRINTH
LUBRICATION MATERIALGREASE
STANDARD TOLERANCE DESIGNATIONABEC NO.1
RETAINER FABRICATION METHODPRESSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
87039X1ANG25Interchangeable
interchangeable cross-reference
interchangeable
M8000M110Interchangeable
interchangeable cross-reference
interchangeable
C87039X1EInterchangeable
interchangeable cross-reference
interchangeable
87039X1225MILG3278Interchangeable
Same NIIN cross-reference
interchangeable
39FSFB106A023A75C0000LInterchangeable
Same NIIN cross-reference
interchangeable
87039X1MILG3278Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R87039XR1MILG3278?
R87039XR1MILG3278 is a BEARING,BALL,ANNULAR.
What parts can replace R87039XR1MILG3278?
There are 6 known substitutes for R87039XR1MILG3278: 87039X1ANG25, M8000M110, C87039X1E and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R87039XR1MILG3278?
R87039XR1MILG3278 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-293-9347. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026