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AC4294-21-3 — BEARING,ROLLER,NEEDLE

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

AC4294-21-3: BEARING,ROLLER,NEEDLE.

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 0.4996 INCHES MINIMUM AND 0.5002 INCHES MAXIMUM IN, alignment_type: RIGID, surface_finish: GROUND, inner_ring_width: 0.6462 INCHES MINIMUM AND 0.6612 INCHES MAXIMUM IN, outer_ring_width: 0.5310 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-142-5847, 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
AC4294-21-3
NSN: 3110-00-142-5847
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 3NPS1 — RBC AIRCRAFT PRODUCTS, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.4996 INCHES MINIMUM AND 0.5002 INCHES MAXIMUM IN
alignment_typeRIGID
surface_finishGROUND
inner_ring_width0.6462 INCHES MINIMUM AND 0.6612 INCHES MAXIMUM IN
outer_ring_width0.5310 INCHES NOMINAL IN
special_features100 PCT MAGNETIC PARTICLE INSPECTED; 10 IN. RADIUS OF OD CROWN; SPECIFIED LUBRICANT PLUS 10 PCT MOS2 IN
style_designatorAIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
surface_treatmentCHROMIUM OUTER RING
lubrication_materialGREASE
overall_outside_diameter1.3115 INCHES MINIMUM AND 1.3130 INCHES MAXIMUM IN
lubrication_material_document_and_classificationMIL-G-25760 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-142-5847
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: AC4294-21-3 · 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
•
LUBRICATION MATERIAL: GREASE
•
OUTER RING WIDTH: 0.5310 INCHES NOMINAL IN
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: AIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 1.3115 INCHES MINIMUM AND 1.3130 INCHES MAXIMUM IN
•
ALIGNMENT TYPE: RIGID
•
SURFACE TREATMENT: CHROMIUM OUTER RING
TECHNICAL CHARACTERISTICS
LUBRICATION MATERIALGREASE
OUTER RING WIDTH0.5310 INCHES NOMINAL IN
SURFACE FINISHGROUND
STYLE DESIGNATORAIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
OVERALL OUTSIDE DIAMETER1.3115 INCHES MINIMUM AND 1.3130 INCHES MAXIMUM IN
ALIGNMENT TYPERIGID
SPECIAL FEATURES100 PCT MAGNETIC PARTICLE INSPECTED; 10 IN. RADIUS OF OD CROWN; SPECIFIED LUBRICANT PLUS 10 PCT MOS2 IN
SURFACE TREATMENTCHROMIUM OUTER RING
SURFACE TREATMENTCADMIUM EXPOSED SURFACES AS MOUNTED
BORE DIAMETER0.4996 INCHES MINIMUM AND 0.5002 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 1
C4294-21-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 AC4294-21-3?
AC4294-21-3 is a BEARING,ROLLER,NEEDLE.
What parts can replace AC4294-21-3?
There is 1 known substitute for AC4294-21-3: C4294-21-3. Substitute compatibility should be verified for your specific system.
What is the NSN for AC4294-21-3?
AC4294-21-3 is cataloged in the U.S. Government catalog under NSN 3110-00-142-5847. 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.