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Technical Data Sheet
PartsTable / COMPONENT / BT559
BT559 ✓ 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include material: STEEL OVERALL, cone_width: 1.4440 INCHES NOMINAL IN, bore_diameter: 2.5000 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, cone_corner_radius: 0.1406 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA CLASS 2. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0282, 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
BT559
NSN: 3110-00-100-0282
FSC: 3110
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cone_width1.4440 INCHES NOMINAL IN
bore_diameter2.5000 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
cone_corner_radius0.1406 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-0282
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: BT559 · 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 DIAMETER: 2.5000 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
•
CONE WIDTH: 1.4440 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
CONE CORNER RADIUS: 0.1406 INCHES NOMINAL IN
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER2.5000 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
CONE WIDTH1.4440 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
NASM90725Interchangeable
interchangeable cross-reference
interchangeable
5768-10Interchangeable
interchangeable cross-reference
interchangeable
B1004 15991Interchangeable
interchangeable cross-reference
interchangeable
3008-4Interchangeable
interchangeable cross-reference
interchangeable
CS1-3042Interchangeable
interchangeable cross-reference
interchangeable
1028-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BT559?
BT559 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace BT559?
There are 23 known substitutes for BT559: NASM90725, 5768-10, B1004 15991 and 20 more. Substitute compatibility should be verified for your specific system.
Is BT559 still available?
BT559 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