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145DS603-4 — BEARING,ROLLER,CYLINDRICAL

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

145DS603-4: BEARING,ROLLER,CYLINDRICAL.

The BEARING,ROLLER,CYLINDRICAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP M50 OVERALL, bore_shape: NONSTANDARD TAPER, flange_width: 0.1150 INCHES MINIMUM AND 0.1350 INCHES MAXIMUM IN, bore_diameter: 4.4095 INCHES MINIMUM AND 4.4100 INCHES MAXIMUM IN, surface_finish: GROUND, inner_ring_width: 0.7234 INCHES MINIMUM AND 0.7454 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-353-7293, 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
145DS603-4
NSN: 3110-01-353-7293
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 38443 — SKF USA INC. (USA)
SPECIFICATIONS
materialSTEEL COMP M50 OVERALL
bore_shapeNONSTANDARD TAPER
flange_width0.1150 INCHES MINIMUM AND 0.1350 INCHES MAXIMUM IN
bore_diameter4.4095 INCHES MINIMUM AND 4.4100 INCHES MAXIMUM IN
surface_finishGROUND
inner_ring_width0.7234 INCHES MINIMUM AND 0.7454 INCHES MAXIMUM IN
locating_featureNONLOCATING
outer_ring_width0.7234 INCHES MINIMUM AND 0.7454 INCHES MAXIMUM IN
special_featuresFLIGHT SAFETY PART
style_designatorSHOULDERED OUTER RING W/PULLER GROOVE, S EPARABLE
end_item_identificationCH-47D,CARGO HEL
flange_outside_diameter6.5840 INCHES MINIMUM AND 6.5844 INCHES MAXIMUM IN
NSN3110-01-353-7293
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 145DS603-4 · 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: 0.7234 INCHES MINIMUM AND 0.7454 INCHES MAXIMUM IN
•
LOCATING FEATURE: NONLOCATING
•
FLANGE OUTSIDE DIAMETER: 6.5840 INCHES MINIMUM AND 6.5844 INCHES MAXIMUM IN
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: SHOULDERED OUTER RING W/PULLER GROOVE, S EPARABLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS6490 (CEVM -50 STEEL) MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
OVERALL OUTSIDE DIAMETER: 5.7083 INCHES MINIMUM AND 5.7087 INCHES MAXIMUM IN
•
BORE SHAPE: NONSTANDARD TAPER
TECHNICAL CHARACTERISTICS
OUTER RING WIDTH0.7234 INCHES MINIMUM AND 0.7454 INCHES MAXIMUM IN
LOCATING FEATURENONLOCATING
FLANGE OUTSIDE DIAMETER6.5840 INCHES MINIMUM AND 6.5844 INCHES MAXIMUM IN
SURFACE FINISHGROUND
STYLE DESIGNATORSHOULDERED OUTER RING W/PULLER GROOVE, S EPARABLE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS6490 (CEVM -50 STEEL) MFR REF SINGLE MATERIAL RESPONSE OVERALL
OVERALL OUTSIDE DIAMETER5.7083 INCHES MINIMUM AND 5.7087 INCHES MAXIMUM IN
BORE SHAPENONSTANDARD TAPER
SPECIAL FEATURESFLIGHT SAFETY PART
FLANGE WIDTH0.1150 INCHES MINIMUM AND 0.1350 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
R1921EX7Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation + specific procedure
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FREQUENTLY ASKED QUESTIONS
What is 145DS603-4?
145DS603-4 is a BEARING,ROLLER,CYLINDRICAL.
What parts can replace 145DS603-4?
There is 1 known substitute for 145DS603-4: R1921EX7. Substitute compatibility should be verified for your specific system.
What is the NSN for 145DS603-4?
145DS603-4 is cataloged in the U.S. Government catalog under NSN 3110-01-353-7293. 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.