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3TAR14-21U — BEARING,BALL,DUPLEX

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

3TAR14-21U: BEARING,BALL,DUPLEX.

The BEARING,BALL,DUPLEX is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C INNER RING, bore_diameter: 0.8750 INCHES NOMINAL IN, overall_width: 0.5000 INCHES NOMINAL IN, load_direction: ANGULAR, surface_finish: GROUND, special_features: RETAINER VACUUM IMPREGNATED WITH SPECIFIED LUBRICANT; REINFORCED RETAINER. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-128-1604, 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
3TAR14-21U
NSN: 3110-01-128-1604
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 78118 — MPB CORPORATION DBA MPB CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 440C INNER RING
bore_diameter0.8750 INCHES NOMINAL IN
overall_width0.5000 INCHES NOMINAL IN
load_directionANGULAR
surface_finishGROUND
special_featuresRETAINER VACUUM IMPREGNATED WITH SPECIFIED LUBRICANT; REINFORCED RETAINER
style_designatorCOUNTERBORED OUTER RINGS, NON-SEPARABLE, FACE TO FACE MOUNTING
bearing_preload_rating15.0 POUNDS NOMINAL LBS
overall_outside_diameter1.3125 INCHES NOMINAL IN
retainer_fabrication_methodMACHINED
standard_tolerance_designationABEC NO.5
material_document_and_classificationUNABLE TO DECODE
NSN3110-01-128-1604
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 3TAR14-21U · 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
•
BEARING PRELOAD RATING: 15.0 POUNDS NOMINAL LBS
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: COUNTERBORED OUTER RINGS, NON-SEPARABLE, FACE TO FACE MOUNTING
•
MATERIAL DOCUMENT AND CLASSIFICATION: UNABLE TO DECODE
•
OVERALL OUTSIDE DIAMETER: 1.3125 INCHES NOMINAL IN
•
LOAD DIRECTION: ANGULAR
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODMACHINED
BEARING PRELOAD RATING15.0 POUNDS NOMINAL LBS
SURFACE FINISHGROUND
STYLE DESIGNATORCOUNTERBORED OUTER RINGS, NON-SEPARABLE, FACE TO FACE MOUNTING
MATERIAL DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
OVERALL WIDTH0.5000 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER1.3125 INCHES NOMINAL IN
LOAD DIRECTIONANGULAR
SPECIAL FEATURESRETAINER VACUUM IMPREGNATED WITH SPECIFIED LUBRICANT; REINFORCED RETAINER
STANDARD TOLERANCE DESIGNATIONABEC NO.5
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 1
13025636Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3TAR14-21U?
3TAR14-21U is a BEARING,BALL,DUPLEX.
What parts can replace 3TAR14-21U?
There is 1 known substitute for 3TAR14-21U: 13025636. Substitute compatibility should be verified for your specific system.
What is the NSN for 3TAR14-21U?
3TAR14-21U is cataloged in the U.S. Government catalog under NSN 3110-01-128-1604. 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.