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3TWA45-56-12 — BEARING,BALL,AIRFRAME

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

3TWA45-56-12: BEARING,BALL,AIRFRAME.

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C OVERALL, bore_diameter: 2.8122 INCHES MINIMUM AND 2.8125 INCHES MAXIMUM IN, load_direction: RADIAL, inner_ring_width: 0.3730 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN, outer_ring_width: 0.3100 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN, style_designator: SINGLE ROW INNER RING EXTENDED BOTH SIDES. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-232-8316, 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
3TWA45-56-12
NSN: 3110-00-232-8316
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 78118 — MPB CORPORATION DBA MPB CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 440C OVERALL
bore_diameter2.8122 INCHES MINIMUM AND 2.8125 INCHES MAXIMUM IN
load_directionRADIAL
shield_quantity2
inner_ring_width0.3730 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
outer_ring_width0.3100 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
special_featuresINTEGRAL SHIELDS,FRACTURED OUTER RING WITH 2 HOLDING RINGS,UNDERSIZE BALLS SEPARATE LOAD CARRYING BALLS,0.0027-0.0031 RADIAL CLEARANCE
style_designatorSINGLE ROW INNER RING EXTENDED BOTH SIDES
overall_outside_diameter3.4994 INCHES MINIMUM AND 3.5000 INCHES MAXIMUM IN
lubrication_material_document_and_classificationMIL-L-17353 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-232-8316
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 3TWA45-56-12 · 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
•
OUTER RING WIDTH: 0.3100 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
•
SHIELD QUANTITY: 2
•
STYLE DESIGNATOR: SINGLE ROW INNER RING EXTENDED BOTH SIDES
•
OVERALL OUTSIDE DIAMETER: 3.4994 INCHES MINIMUM AND 3.5000 INCHES MAXIMUM IN
•
LOAD DIRECTION: RADIAL
•
BORE DIAMETER: 2.8122 INCHES MINIMUM AND 2.8125 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 440C OVERALL
TECHNICAL CHARACTERISTICS
OUTER RING WIDTH0.3100 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
SHIELD QUANTITY2
STYLE DESIGNATORSINGLE ROW INNER RING EXTENDED BOTH SIDES
OVERALL OUTSIDE DIAMETER3.4994 INCHES MINIMUM AND 3.5000 INCHES MAXIMUM IN
LOAD DIRECTIONRADIAL
SPECIAL FEATURESINTEGRAL SHIELDS,FRACTURED OUTER RING WITH 2 HOLDING RINGS,UNDERSIZE BALLS SEPARATE LOAD CARRYING BALLS,0.0027-0.0031 RADIAL CLEARANCE
BORE DIAMETER2.8122 INCHES MINIMUM AND 2.8125 INCHES MAXIMUM IN
MATERIALSTEEL COMP 440C OVERALL
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-L-17353 MIL SPEC SINGLE MATERIAL RESPONSE
INNER RING WIDTH0.3730 INCHES MINIMUM AND 0.3750 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3TWA45-56-12?
3TWA45-56-12 is a BEARING,BALL,AIRFRAME.
What is the NSN for 3TWA45-56-12?
3TWA45-56-12 is cataloged in the U.S. Government catalog under NSN 3110-00-232-8316. This indicates validated use in U.S. government and defense supply chains.
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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.