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MA-1057B — RING,BEARING,OUTER

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

MA-1057B: RING,BEARING,OUTER.

The RING,BEARING,OUTER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, crown_radius: 10.0000 INCHES NOMINAL IN, overall_width: 2.3100 INCHES NOMINAL IN, surface_finish: GROUND, style_designator: OUTER RING, ROLLER, SINGLE LIP, CROWNED OD, largest_bore_diameter: 4.7229 INCHES MINIMUM AND 4.7238 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-321-9762, 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
MA-1057B
NSN: 3110-01-321-9762
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 38490 — LIFTKING MANUFACTURING CORP (CAN)
SPECIFICATIONS
materialSTEEL OVERALL
crown_radius10.0000 INCHES NOMINAL IN
overall_width2.3100 INCHES NOMINAL IN
surface_finishGROUND
style_designatorOUTER RING, ROLLER, SINGLE LIP, CROWNED OD
largest_bore_diameter4.7229 INCHES MINIMUM AND 4.7238 INCHES MAXIMUM IN
overall_outside_diameter6.4900 INCHES MINIMUM AND 6.5000 INCHES MAXIMUM IN
NSN3110-01-321-9762
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MA-1057B · 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
•
SURFACE FINISH: GROUND
•
CROWN RADIUS: 10.0000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: OUTER RING, ROLLER, SINGLE LIP, CROWNED OD
•
OVERALL OUTSIDE DIAMETER: 6.4900 INCHES MINIMUM AND 6.5000 INCHES MAXIMUM IN
•
LARGEST BORE DIAMETER: 4.7229 INCHES MINIMUM AND 4.7238 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISHGROUND
CROWN RADIUS10.0000 INCHES NOMINAL IN
STYLE DESIGNATOROUTER RING, ROLLER, SINGLE LIP, CROWNED OD
OVERALL WIDTH2.3100 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER6.4900 INCHES MINIMUM AND 6.5000 INCHES MAXIMUM IN
LARGEST BORE DIAMETER4.7229 INCHES MINIMUM AND 4.7238 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
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

No substitute or cross-reference records for this part.

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 MA-1057B?
MA-1057B is a RING,BEARING,OUTER.
What is the NSN for MA-1057B?
MA-1057B is cataloged in the U.S. Government catalog under NSN 3110-01-321-9762. 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.