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Technical Data Sheet
PartsTable / COMPONENT / 1B3955
1B3955 ✓ 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 end_item_identification: C17ENGINE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0360, 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
1B3955
NSN: 3110-00-100-0360
FSC: 3110
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
end_item_identificationC17ENGINE
NSN3110-00-100-0360
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 1B3955 · 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
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
2729Interchangeable
interchangeable cross-reference
interchangeable
CNU249EInterchangeable
interchangeable cross-reference
interchangeable
12DS7Interchangeable
interchangeable cross-reference
interchangeable
182540Interchangeable
interchangeable cross-reference
interchangeable
395582Interchangeable
interchangeable cross-reference
interchangeable
367984R1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1B3955?
1B3955 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 1B3955?
There are 29 known substitutes for 1B3955: 2729, CNU249E, 12DS7 and 26 more. Substitute compatibility should be verified for your specific system.
Is 1B3955 still available?
1B3955 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