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3TA017-21A8 — BEARING,BALL,DUPLEX

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

3TA017-21A8: BEARING,BALL,DUPLEX.

The BEARING,BALL,DUPLEX is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C BALL, bore_diameter: 1.0625 INCHES NOMINAL IN, overall_width: 0.3125 INCHES NOMINAL IN, load_direction: ANGULAR, surface_finish: GROUND, special_features: CONTACT ANGLE 23 DEG PORM4 DEG. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-403-7658, 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
3TA017-21A8
NSN: 3110-00-403-7658
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 40920 — MPB CORP DIV TIMKEN SUPER PRECISION (USA)
SPECIFICATIONS
materialSTEEL COMP 440C BALL
bore_diameter1.0625 INCHES NOMINAL IN
overall_width0.3125 INCHES NOMINAL IN
load_directionANGULAR
surface_finishGROUND
special_featuresCONTACT ANGLE 23 DEG PORM4 DEG
style_designatorCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
internal_clearance0.0006 INCHES MINIMUM RADIAL AND 0.0010 INCHES MAXIMUM RADIAL IN
bearing_preload_rating25.0 POUNDS NOMINAL LBS
overall_outside_diameter1.3125 INCHES NOMINAL IN
standard_tolerance_designationABEC NO. 5T
material_document_and_classificationUNABLE TO DECODE
NSN3110-00-403-7658
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 3TA017-21A8 · 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
•
BEARING PRELOAD RATING: 25.0 POUNDS NOMINAL LBS
•
INTERNAL CLEARANCE: 0.0006 INCHES MINIMUM RADIAL AND 0.0010 INCHES MAXIMUM RADIAL IN
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
•
MATERIAL DOCUMENT AND CLASSIFICATION: UNABLE TO DECODE
•
OVERALL OUTSIDE DIAMETER: 1.3125 INCHES NOMINAL IN
•
LOAD DIRECTION: ANGULAR
TECHNICAL CHARACTERISTICS
BEARING PRELOAD RATING25.0 POUNDS NOMINAL LBS
INTERNAL CLEARANCE0.0006 INCHES MINIMUM RADIAL AND 0.0010 INCHES MAXIMUM RADIAL IN
SURFACE FINISHGROUND
STYLE DESIGNATORCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
MATERIAL DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
OVERALL WIDTH0.3125 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER1.3125 INCHES NOMINAL IN
LOAD DIRECTIONANGULAR
SPECIAL FEATURESCONTACT ANGLE 23 DEG PORM4 DEG
STANDARD TOLERANCE DESIGNATIONABEC NO. 5T
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
972155-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
AMV68WI84AWDBE9937AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3TA017-21A8?
3TA017-21A8 is a BEARING,BALL,DUPLEX.
What parts can replace 3TA017-21A8?
There are 2 known substitutes for 3TA017-21A8: 972155-1, AMV68WI84AWDBE9937A. Substitute compatibility should be verified for your specific system.
What is the NSN for 3TA017-21A8?
3TA017-21A8 is cataloged in the U.S. Government catalog under NSN 3110-00-403-7658. 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.