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B4221 — BEARING,ROLLER,CYLINDRICAL

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

B4221: BEARING,ROLLER,CYLINDRICAL.

The BEARING,ROLLER,CYLINDRICAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, surface_finish: GROUND, locating_feature: NONLOCATING, special_features: INNER RING AND ROLLER ASSY,NO OUTER RING, internal_fit-up_designation: STANDARD. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-3559, 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
B4221
NSN: 3110-00-100-3559
NIINs: 001003559, 001420948
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 23040 — FORD MOTOR CO FORD PARTS AND SERVICE DIV GOVERNMENT PART SALES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
surface_finishGROUND
locating_featureNONLOCATING
special_featuresINNER RING AND ROLLER ASSY,NO OUTER RING
internal_fit-up_designationSTANDARD
NSN3110-00-100-3559
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B4221 · 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
SUBSTITUTES & CROSS-REFERENCES 1
28156Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B4221?
B4221 is a BEARING,ROLLER,CYLINDRICAL.
What parts can replace B4221?
There is 1 known substitute for B4221: 28156. Substitute compatibility should be verified for your specific system.
What is the NSN for B4221?
B4221 is cataloged in the U.S. Government catalog under NSN 3110-00-100-3559. 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.