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ATF03 — BEARING,ROLLER,NEEDLE

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

ATF03: BEARING,ROLLER,NEEDLE.

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1074 OVERALL, crown_radius: 12.5000 INCHES MINIMUM AND 14.5000 INCHES MAXIMUM IN, bore_diameter: 0.1893 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN, alignment_type: RIGID, surface_finish: GROUND, inner_ring_width: 0.3020 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-327-2303, 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
ATF03
NSN: 3110-01-327-2303
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1074 OVERALL
crown_radius12.5000 INCHES MINIMUM AND 14.5000 INCHES MAXIMUM IN
bore_diameter0.1893 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN
seal_quantity2
alignment_typeRIGID
surface_finishGROUND
inner_ring_width0.3020 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
outer_ring_width0.2650 INCHES MINIMUM AND 0.2800 INCHES MAXIMUM IN
style_designatorTRACK ROLLER
bearing_seal_typeCONTACT
surface_treatmentCADMIUM OVERALL
lubrication_materialGREASE
NSN3110-01-327-2303
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: ATF03 · 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 SEAL TYPE: CONTACT
•
LUBRICATION MATERIAL: GREASE
•
OUTER RING WIDTH: 0.2650 INCHES MINIMUM AND 0.2800 INCHES MAXIMUM IN
•
SURFACE FINISH: GROUND
•
CROWN RADIUS: 12.5000 INCHES MINIMUM AND 14.5000 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: TRACK ROLLER
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OVERALL OUTSIDE DIAMETER: 0.7490 INCHES MINIMUM AND 0.7510 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
BEARING SEAL TYPECONTACT
LUBRICATION MATERIALGREASE
OUTER RING WIDTH0.2650 INCHES MINIMUM AND 0.2800 INCHES MAXIMUM IN
SURFACE FINISHGROUND
CROWN RADIUS12.5000 INCHES MINIMUM AND 14.5000 INCHES MAXIMUM IN
STYLE DESIGNATORTRACK ROLLER
MATERIAL DOCUMENT AND CLASSIFICATIONAMS6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL OUTSIDE DIAMETER0.7490 INCHES MINIMUM AND 0.7510 INCHES MAXIMUM IN
SPECIFICATION/STANDARD DATA81205-BACB10ET03 MANUFACTURERS SOURCE CONTROL
ALIGNMENT TYPERIGID
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
BACB10ET03Same 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 ATF03?
ATF03 is a BEARING,ROLLER,NEEDLE.
What parts can replace ATF03?
There is 1 known substitute for ATF03: BACB10ET03. Substitute compatibility should be verified for your specific system.
What is the NSN for ATF03?
ATF03 is cataloged in the U.S. Government catalog under NSN 3110-01-327-2303. 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.