PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 259-21
259-21 ✓ 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, overall_height: 0.640 INCHES NOMINAL IN, style_designator: POPPET, end_item_identification: 3930-01-305-2111, media_for_which_designed: HYDRAULIC FLUID, outside/top_flange_diameter: 1.200 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-144-8540, 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
259-21
NSN: 3110-00-144-8540
FSC: 3110
CAGE: 14418 — UNISYS CORP DEFENSE SYSTEMS C S D FIELD ENGINEERING (USA)
SPECIFICATIONS
materialSTEEL
overall_height0.640 INCHES NOMINAL IN
style_designatorPOPPET
end_item_identification3930-01-305-2111
media_for_which_designedHYDRAULIC FLUID
outside/top_flange_diameter1.200 INCHES NOMINAL IN
NSN3110-00-144-8540
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 259-21 · 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
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
MATERIAL: STEEL OVERALL
•
BORE DIAMETER: 50.00 MILLIMETERS NOMINAL MM
•
LOAD DIRECTION: RADIAL
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
BORE SHAPE: STRAIGHT
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE FINISHGROUND
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
MATERIALSTEEL OVERALL
BORE DIAMETER50.00 MILLIMETERS NOMINAL MM
LOAD DIRECTIONRADIAL
OVERALL WIDTH20.00 MILLIMETERS NOMINAL MM
INTERNAL FIT-UP DESIGNATIONSTANDARD
BORE SHAPESTRAIGHT
STANDARD TOLERANCE DESIGNATIONABEC NO.1
OVERALL OUTSIDE DIAMETER90.00 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
62735-3Interchangeable
interchangeable cross-reference
interchangeable
6210Interchangeable
interchangeable cross-reference
interchangeable
1851640Interchangeable
interchangeable cross-reference
interchangeable
TW151199Interchangeable
interchangeable cross-reference
interchangeable
203210Interchangeable
interchangeable cross-reference
interchangeable
SF1010Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 259-21?
259-21 is a BEARING,BALL,ANNULAR.
What parts can replace 259-21?
There are 31 known substitutes for 259-21: 62735-3, 6210, 1851640 and 28 more. Substitute compatibility should be verified for your specific system.
Is 259-21 still available?
259-21 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026