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PartsTable / COMPONENT / R18489
R18489 ✓ 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 OVERALL, flange_width: 0.2500 INCHES NOMINAL IN, overall_width: 1.1875 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, FLANGED, backface_corner_radius: 0.1250 INCHES NOMINAL IN, flange_outside_diameter: 4.6250 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 3110-00-142-4407, 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
R18489
NSN: 3110-00-142-4407
FSC: 3110
CAGE: 23926 — KOMATSU AMERICA CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flange_width0.2500 INCHES NOMINAL IN
overall_width1.1875 INCHES NOMINAL IN
style_designatorNORMAL ANGLE, FLANGED
backface_corner_radius0.1250 INCHES NOMINAL IN
flange_outside_diameter4.6250 INCHES NOMINAL IN
outer_ring_outside_diameter4.3750 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-142-4407
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: R18489 · 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
•
FLANGE WIDTH: 0.2500 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
OUTER RING OUTSIDE DIAMETER: 4.3750 INCHES NOMINAL IN
•
FLANGE OUTSIDE DIAMETER: 4.6250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE, FLANGED
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
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)
FLANGE WIDTH0.2500 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
OUTER RING OUTSIDE DIAMETER4.3750 INCHES NOMINAL IN
FLANGE OUTSIDE DIAMETER4.6250 INCHES NOMINAL IN
OVERALL WIDTH1.1875 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE, FLANGED
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
1848-9Interchangeable
interchangeable cross-reference
interchangeable
M4610-2-24Interchangeable
interchangeable cross-reference
interchangeable
532BInterchangeable
interchangeable cross-reference
interchangeable
9937Interchangeable
interchangeable cross-reference
interchangeable
242-0383-000Interchangeable
interchangeable cross-reference
interchangeable
1714-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R18489?
R18489 is a CUP,TAPERED ROLLER BEARING.
What parts can replace R18489?
There are 14 known substitutes for R18489: 1848-9, M4610-2-24, 532B and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R18489?
R18489 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4407. 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