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Technical Data Sheet
PartsTable / COMPONENT / 637539
637539 ✓ 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 CUP,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL COMP 303 OVERALL, body_style: PLAIN, SOLID, bore_style: PLAIN BOTH ENDS, tooth_form: STANDARD, overall_width: 0.6730 INCHES NOMINAL IN, pitch_diameter: 0.9052 INCHES MINIMUM AND 0.9062 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-143-7579, 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
637539
NSN: 3110-00-143-7579
FSC: 3110
CAGE: 12204 — CHRYSLER REALTY COMPANY LLC DBA DAIMLER CHRYSLER (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
body_stylePLAIN, SOLID
bore_stylePLAIN BOTH ENDS
tooth_formSTANDARD
overall_width0.6730 INCHES NOMINAL IN
pitch_diameter0.9052 INCHES MINIMUM AND 0.9062 INCHES MAXIMUM IN
pressure_angle14.5000 DEGREES
teeth_quantity29
outside_diameter2.2477 INCHES NOMINAL IN
style_designatorPROTRUDING HUB
attachment_methodCLAMP
surface_treatmentPASSIVATE OVERALL
NSN3110-00-143-7579
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 637539 · 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
•
MATERIAL: STEEL OVERALL
•
BACKFACE CORNER RADIUS: 0.0469 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
OUTSIDE DIAMETER: 2.2477 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)
MATERIALSTEEL OVERALL
BACKFACE CORNER RADIUS0.0469 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
OVERALL WIDTH0.6730 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OUTSIDE DIAMETER2.2477 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
RJ6CInterchangeable
interchangeable cross-reference
interchangeable
WS506Interchangeable
interchangeable cross-reference
interchangeable
42AInterchangeable
interchangeable cross-reference
interchangeable
637539Interchangeable
interchangeable cross-reference
interchangeable
14CInterchangeable
interchangeable cross-reference
interchangeable
4DP2033APC16X3-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 637539?
637539 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 637539?
There are 21 known substitutes for 637539: RJ6C, WS506, 42A and 18 more. Substitute compatibility should be verified for your specific system.
Is 637539 still available?
637539 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