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HDB 004-W129 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

HDB 004-W129: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include bore_diameter: 0.7871 INCHES MINIMUM AND 0.7874 INCHES MAXIMUM IN, overall_width: 0.3493 INCHES MINIMUM AND 0.3543 INCHES MAXIMUM IN, end_item_identification: T-38 ACFT, overall_outside_diameter: 1.4563 INCHES MINIMUM AND 1.4567 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-419-2220, 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
HDB 004-W129
NSN: 3110-01-419-2220
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 78118 — MPB CORPORATION DBA MPB CORP (USA)
SPECIFICATIONS
bore_diameter0.7871 INCHES MINIMUM AND 0.7874 INCHES MAXIMUM IN
overall_width0.3493 INCHES MINIMUM AND 0.3543 INCHES MAXIMUM IN
end_item_identificationT-38 ACFT
overall_outside_diameter1.4563 INCHES MINIMUM AND 1.4567 INCHES MAXIMUM IN
NSN3110-01-419-2220
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: HDB 004-W129 · 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
•
OVERALL OUTSIDE DIAMETER: 1.4563 INCHES MINIMUM AND 1.4567 INCHES MAXIMUM IN
•
BORE DIAMETER: 0.7871 INCHES MINIMUM AND 0.7874 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL WIDTH0.3493 INCHES MINIMUM AND 0.3543 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER1.4563 INCHES MINIMUM AND 1.4567 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONT-38 ACFT
BORE DIAMETER0.7871 INCHES MINIMUM AND 0.7874 INCHES MAXIMUM IN
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 2
HKR 004-128Reference document
Same NSN cross-reference
Reference document — Secondary reference
HDB 004-129Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HDB 004-W129?
HDB 004-W129 is a BEARING,BALL,ANNULAR.
What parts can replace HDB 004-W129?
There are 2 known substitutes for HDB 004-W129: HKR 004-128, HDB 004-129. Substitute compatibility should be verified for your specific system.
What is the NSN for HDB 004-W129?
HDB 004-W129 is cataloged in the U.S. Government catalog under NSN 3110-01-419-2220. 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.