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Technical Data Sheet
PartsTable / COMPONENT / 521059-3
521059-3 ✓ 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 BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL INNER RING, bore_shape: STRAIGHT, bore_diameter: 17.00 MILLIMETERS NOMINAL MM, overall_width: 12.0 MILLIMETERS NOMINAL MM, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-720-2710, 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
521059-3
NSN: 3110-00-720-2710
FSC: 3110
CAGE: 30715 — SABRELINER CORP (USA)
SPECIFICATIONS
materialSTEEL INNER RING
bore_shapeSTRAIGHT
bore_diameter17.00 MILLIMETERS NOMINAL MM
overall_width12.0 MILLIMETERS NOMINAL MM
load_directionRADIAL
surface_finishGROUND
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
internal_clearance0.0002 INCHES MINIMUM RADIAL AND 0.0006 INCHES MAXIMUM RADIAL IN
overall_outside_diameter40.00 MILLIMETERS NOMINAL MM
retainer_fabrication_methodMACHINED
standard_tolerance_designationABEC NO.5
NSN3110-00-720-2710
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 521059-3 · 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
•
BORE SHAPE: STRAIGHT
•
MATERIAL: PLASTIC PHENOLIC RETAINER
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.5
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH12.0 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
MATERIALPLASTIC PHENOLIC RETAINER
MATERIALSTEEL BALL
MATERIALSTEEL OUTER RING
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
MATERIALSTEEL INNER RING
STANDARD TOLERANCE DESIGNATIONABEC NO.5
RETAINER FABRICATION METHODMACHINED
SURFACE FINISHGROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
203KSC2Interchangeable
interchangeable cross-reference
interchangeable
203SInterchangeable
interchangeable cross-reference
interchangeable
423648C91Interchangeable
interchangeable cross-reference
interchangeable
416821-66DInterchangeable
interchangeable cross-reference
interchangeable
903203Interchangeable
interchangeable cross-reference
interchangeable
AS1937-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 521059-3?
521059-3 is a BEARING,BALL,ANNULAR.
What parts can replace 521059-3?
There are 9 known substitutes for 521059-3: 203KSC2, 203S, 423648C91 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 521059-3?
521059-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-720-2710. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026