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Technical Data Sheet
PartsTable / COMPONENT / S1188502
S1188502 ✓ 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,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, cup_width: 0.3750 INCHES NOMINAL IN, cone_width: 0.4391 INCHES NOMINAL IN, bore_diameter: 0.6690 INCHES NOMINAL IN, overall_width: 0.4730 INCHES NOMINAL IN, standout_width: 0.0980 INCHES NOMINAL 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 3110-00-155-7445, 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
S1188502
NSN: 3110-00-155-7445
FSC: 3110
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.3750 INCHES NOMINAL IN
cone_width0.4391 INCHES NOMINAL IN
bore_diameter0.6690 INCHES NOMINAL IN
overall_width0.4730 INCHES NOMINAL IN
standout_width0.0980 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0310 INCHES NOMINAL IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter1.5745 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-155-7445
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: S1188502 · 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
•
CUP WIDTH: 0.3750 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE CORNER RADIUS: 0.0310 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.0980 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
BACKFACE CORNER RADIUS: 0.0460 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)
CUP WIDTH0.3750 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CONE CORNER RADIUS0.0310 INCHES NOMINAL IN
STANDOUT WIDTH0.0980 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
OVERALL WIDTH0.4730 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
BACKFACE CORNER RADIUS0.0460 INCHES NOMINAL IN
BORE DIAMETER0.6690 INCHES NOMINAL IN
CONE WIDTH0.4391 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
E2538Interchangeable
interchangeable cross-reference
interchangeable
6786Interchangeable
interchangeable cross-reference
interchangeable
678&5Interchangeable
interchangeable cross-reference
interchangeable
SA3274Interchangeable
interchangeable cross-reference
interchangeable
535834-6Interchangeable
interchangeable cross-reference
interchangeable
E7953-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S1188502?
S1188502 is a BEARING,ROLLER,TAPERED.
What parts can replace S1188502?
There are 11 known substitutes for S1188502: E2538, 6786, 678&5 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S1188502?
S1188502 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-7445. 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