PartsTable
Technical Data Sheet
15578/15520 ✓ Verified by PartsTable
· TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The 15578/15520 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-352-5137, 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
15578/15520
NSN: 3110-01-352-5137
FSC: 3110
CAGE: 50380 — RELIANCE ELECTRIC (USA)
SPECIFICATIONS
Part Number15578/15520
NSN3110-01-352-5137
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 15578/15520 · 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
SUPPLEMENTARY FEATURES: COGNIZANT SERVICE - UNITED KINGDOM ROYAL AIR FORCE
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONUK/FSC/602-PHASE III SERVO INTRODUCTION,RELIANCE ELECTRIC CO
SUPPLEMENTARY FEATURESCOGNIZANT SERVICE - UNITED KINGDOM ROYAL AIR FORCE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
15520-78Interchangeable
interchangeable cross-reference
interchangeable
200912-0004Interchangeable
interchangeable cross-reference
interchangeable
15578-15520Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 15578/15520?
15578/15520 is a 15578/15520.
What parts can replace 15578/15520?
There are 3 known substitutes for 15578/15520: 15520-78, 200912-0004, 15578-15520. Substitute compatibility should be verified for your specific system.
What is the NSN for 15578/15520?
15578/15520 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-352-5137. This indicates validated use in U.S. government and defense supply chains.
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