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6878486 — BEARING,ROLLER,CYLINDRICAL

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

6878486: BEARING,ROLLER,CYLINDRICAL.

The BEARING,ROLLER,CYLINDRICAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP M50 OUTER RING, bore_shape: STRAIGHT, bore_diameter: 0.6991 INCHES MINIMUM AND 0.6998 INCHES MAXIMUM IN, overall_width: 0.3887 INCHES MINIMUM AND 0.3937 INCHES MAXIMUM IN, surface_finish: GROUND, locating_feature: NONLOCATING. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-040-3886, 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
6878486
NSN: 3110-01-040-3886
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialSTEEL COMP M50 OUTER RING
bore_shapeSTRAIGHT
bore_diameter0.6991 INCHES MINIMUM AND 0.6998 INCHES MAXIMUM IN
overall_width0.3887 INCHES MINIMUM AND 0.3937 INCHES MAXIMUM IN
surface_finishGROUND
locating_featureNONLOCATING
special_featuresSEPARATOR SILVER PLATED 0.0005-0.0015 THK PER AMS 2412
style_designatorSINGLE ROW, ONE-DIRECTION LOCATING, TWO LIP INNER RING, ONE LIP OUTER RING, SEPARABLE
internal_clearance0.0010 INCHES MINIMUM RADIAL AND 0.0022 INCHES MAXIMUM RADIAL IN
end_item_identificationACFT ENG T-56
overall_outside_diameter1.3778 INCHES MINIMUM AND 1.3780 INCHES MAXIMUM IN
retainer_fabrication_methodMACHINED
NSN3110-01-040-3886
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 6878486 · 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
•
RETAINER FABRICATION METHOD: MACHINED
•
INTERNAL CLEARANCE: 0.0010 INCHES MINIMUM RADIAL AND 0.0022 INCHES MAXIMUM RADIAL IN
•
LOCATING FEATURE: NONLOCATING
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: SINGLE ROW, ONE-DIRECTION LOCATING, TWO LIP INNER RING, ONE LIP OUTER RING, SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 1.3778 INCHES MINIMUM AND 1.3780 INCHES MAXIMUM IN
•
BORE SHAPE: STRAIGHT
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODMACHINED
INTERNAL CLEARANCE0.0010 INCHES MINIMUM RADIAL AND 0.0022 INCHES MAXIMUM RADIAL IN
LOCATING FEATURENONLOCATING
SURFACE FINISHGROUND
STYLE DESIGNATORSINGLE ROW, ONE-DIRECTION LOCATING, TWO LIP INNER RING, ONE LIP OUTER RING, SEPARABLE
OVERALL WIDTH0.3887 INCHES MINIMUM AND 0.3937 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER1.3778 INCHES MINIMUM AND 1.3780 INCHES MAXIMUM IN
BORE SHAPESTRAIGHT
SPECIAL FEATURESSEPARATOR SILVER PLATED 0.0005-0.0015 THK PER AMS 2412
END ITEM IDENTIFICATIONACFT ENG T-56
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6878486?
6878486 is a BEARING,ROLLER,CYLINDRICAL.
What is the NSN for 6878486?
6878486 is cataloged in the U.S. Government catalog under NSN 3110-01-040-3886. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.