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Technical Data Sheet
PartsTable / COMPONENT / TT1181
TT1181 ✓ 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

CAPACITOR,FIXED,PAPER DIELECTRIC. Key specifications include material: COPPER ALLOY RETAINER, alignment_type: RIGID, overall_height: 0.7445 INCHES NOMINAL IN, surface_finish: GROUND, style_designator: CLUTCH RELEASE, THRUST, LUBRICATED AND SEALED, bore_smallest_diameter: 1.6250 INCHES MINIMUM AND 1.6260 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-198-2443, 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
TT1181
NSN: 3110-00-198-2443
FSC: 3110
CAGE: 80040 — L AND S BEARING CO INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY RETAINER
alignment_typeRIGID
overall_height0.7445 INCHES NOMINAL IN
surface_finishGROUND
style_designatorCLUTCH RELEASE, THRUST, LUBRICATED AND SEALED
bore_smallest_diameter1.6250 INCHES MINIMUM AND 1.6260 INCHES MAXIMUM IN
overall_outside_diameter3.1100 INCHES MINIMUM AND 3.1400 INCHES MAXIMUM IN
thrust_directional_capability_designationSINGLE
NSN3110-00-198-2443
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: TT1181 · 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
•
BORE SMALLEST DIAMETER: 1.6250 INCHES MINIMUM AND 1.6260 INCHES MAXIMUM IN
•
THRUST DIRECTIONAL CAPABILITY DESIGNATION: SINGLE
•
ALIGNMENT TYPE: RIGID
•
OVERALL OUTSIDE DIAMETER: 3.1100 INCHES MINIMUM AND 3.1400 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY RETAINER
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE FINISHGROUND
BORE SMALLEST DIAMETER1.6250 INCHES MINIMUM AND 1.6260 INCHES MAXIMUM IN
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
ALIGNMENT TYPERIGID
OVERALL OUTSIDE DIAMETER3.1100 INCHES MINIMUM AND 3.1400 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY RETAINER
MATERIALSTEEL WASHER
OVERALL HEIGHT0.7445 INCHES NOMINAL IN
STYLE DESIGNATORCLUTCH RELEASE, THRUST, LUBRICATED AND SEALED
MATERIALSTEEL BALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
20-2181Interchangeable
interchangeable cross-reference
interchangeable
311-001-031Interchangeable
interchangeable cross-reference
interchangeable
5905001410742Interchangeable
interchangeable cross-reference
interchangeable
GP7766Interchangeable
interchangeable cross-reference
interchangeable
R20838Interchangeable
interchangeable cross-reference
interchangeable
18-8-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TT1181?
TT1181 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace TT1181?
There are 14 known substitutes for TT1181: 20-2181, 311-001-031, 5905001410742 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TT1181?
TT1181 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-198-2443. 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