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Technical Data Sheet
PartsTable / COMPONENT / 55187-C
55187-C ✓ 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: 1.0594 INCHES NOMINAL IN, bore_diameter: 1.8750 INCHES NOMINAL IN, special_features: INCREASED COMPLEMENT OF ROLLERS, style_designator: STEEP ANGLE, cone_corner_radius: 0.1400 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-987-0630, 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
55187-C
NSN: 3110-00-987-0630
FSC: 3110
CAGE: 0LTL1 — NTN BEARING CORPORATION OF AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cone_width1.0594 INCHES NOMINAL IN
bore_diameter1.8750 INCHES NOMINAL IN
special_featuresINCREASED COMPLEMENT OF ROLLERS
style_designatorSTEEP ANGLE
cone_corner_radius0.1400 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-987-0630
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 55187-C · 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
•
STYLE DESIGNATOR: STEEP ANGLE
•
BORE DIAMETER: 1.8750 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
CONE WIDTH: 1.0594 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE CORNER RADIUS: 0.1400 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)
STYLE DESIGNATORSTEEP ANGLE
BORE DIAMETER1.8750 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
CONE WIDTH1.0594 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
SPECIAL FEATURESINCREASED COMPLEMENT OF ROLLERS
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
E050557Interchangeable
interchangeable cross-reference
interchangeable
55187Interchangeable
interchangeable cross-reference
interchangeable
234060Interchangeable
interchangeable cross-reference
interchangeable
53177-53375Interchangeable
interchangeable cross-reference
interchangeable
377A191Interchangeable
interchangeable cross-reference
interchangeable
BT53177-533Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55187-C?
55187-C is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace 55187-C?
There are 27 known substitutes for 55187-C: E050557, 55187, 234060 and 24 more. Substitute compatibility should be verified for your specific system.
Is 55187-C still available?
55187-C is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026