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4001277 — BEARING,ROLLER,CYLINDRICAL

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

4001277: BEARING,ROLLER,CYLINDRICAL.

The BEARING,ROLLER,CYLINDRICAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340 RETAINER, bore_shape: STRAIGHT, bore_diameter: 1.3778 INCHES MINIMUM AND 1.3780 INCHES MAXIMUM IN, overall_width: 0.5462 INCHES MINIMUM AND 0.5512 INCHES MAXIMUM IN, surface_finish: UNGROUND, locating_feature: NONLOCATING. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-416-9423, 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
4001277
NSN: 3110-00-416-9423
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 38443 — SKF USA INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 RETAINER
bore_shapeSTRAIGHT
bore_diameter1.3778 INCHES MINIMUM AND 1.3780 INCHES MAXIMUM IN
overall_width0.5462 INCHES MINIMUM AND 0.5512 INCHES MAXIMUM IN
surface_finishUNGROUND
locating_featureNONLOCATING
special_featuresINNER AND OUTER RINGS AND ROLLER MATL VACUUM DEGASSED PROCESS
style_designatorSINGLE ROW, ONE-DIRECTION LOCATING, ONE LIP INNER RING, ONE LIP OUTER RING WITH ONE ROLLER RETAINMENT RING ON OUTER, SEPARABLE
precious_materialSILVER
internal_clearance0.0007 INCHES MINIMUM AXIAL AND 0.0022 INCHES MAXIMUM AXIAL IN
end_item_identificationF100 ENGINE
overall_outside_diameter2.4406 INCHES MINIMUM AND 2.4409 INCHES MAXIMUM IN
NSN3110-00-416-9423
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 4001277 · 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: 0.0007 INCHES MINIMUM AXIAL AND 0.0022 INCHES MAXIMUM AXIAL IN
•
LOCATING FEATURE: NONLOCATING
•
SURFACE FINISH: UNGROUND
•
PRECIOUS MATERIAL: SILVER
•
STYLE DESIGNATOR: SINGLE ROW, ONE-DIRECTION LOCATING, ONE LIP INNER RING, ONE LIP OUTER RING WITH ONE ROLLER RETAINMENT RING ON OUTER, SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 2.4406 INCHES MINIMUM AND 2.4409 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODMACHINED
INTERNAL CLEARANCE0.0007 INCHES MINIMUM AXIAL AND 0.0022 INCHES MAXIMUM AXIAL IN
LOCATING FEATURENONLOCATING
SURFACE FINISHUNGROUND
PRECIOUS MATERIALSILVER
STYLE DESIGNATORSINGLE ROW, ONE-DIRECTION LOCATING, ONE LIP INNER RING, ONE LIP OUTER RING WITH ONE ROLLER RETAINMENT RING ON OUTER, SEPARABLE
OVERALL WIDTH0.5462 INCHES MINIMUM AND 0.5512 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER2.4406 INCHES MINIMUM AND 2.4409 INCHES MAXIMUM IN
BORE SHAPESTRAIGHT
SPECIAL FEATURESINNER AND OUTER RINGS AND ROLLER MATL VACUUM DEGASSED PROCESS
SUBSTITUTES & CROSS-REFERENCES 4
4044745Reference document
Same NSN cross-reference
Reference document — Secondary reference
4032003Reference document
Same NSN cross-reference
Reference document — Secondary reference
4001278Reference document
Same NSN cross-reference
Reference document — Secondary reference
4001276Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4001277?
4001277 is a BEARING,ROLLER,CYLINDRICAL.
What parts can replace 4001277?
There are 4 known substitutes for 4001277: 4044745, 4032003, 4001278 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4001277?
4001277 is cataloged in the U.S. Government catalog under NSN 3110-00-416-9423. 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.