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Technical Data Sheet
PartsTable / COMPONENT / SK203-40
SK203-40 ✓ 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: 0.6875 INCHES NOMINAL IN, cone_width: 0.9330 INCHES NOMINAL IN, bore_diameter: 1.5000 INCHES NOMINAL IN, overall_width: 1.0000 INCHES NOMINAL IN, standout_width: 0.3125 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 3110-00-100-5814, 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
SK203-40
NSN: 3110-00-100-5814
FSC: 3110
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.6875 INCHES NOMINAL IN
cone_width0.9330 INCHES NOMINAL IN
bore_diameter1.5000 INCHES NOMINAL IN
overall_width1.0000 INCHES NOMINAL IN
standout_width0.3125 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, STEEP ANGLE
cone_corner_radius0.0930 INCHES NOMINAL IN
backface_corner_radius0.0620 INCHES NOMINAL IN
overall_outside_diameter3.4843 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-5814
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: SK203-40 · 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
•
STANDOUT WIDTH: 0.3125 INCHES NOMINAL IN
•
OVERALL OUTSIDE DIAMETER: 3.4843 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE WIDTH: 0.9330 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0620 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.0930 INCHES NOMINAL IN
•
BORE DIAMETER: 1.5000 INCHES NOMINAL IN
•
CUP WIDTH: 0.6875 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)
STANDOUT WIDTH0.3125 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.4843 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CONE WIDTH0.9330 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0620 INCHES NOMINAL IN
CONE CORNER RADIUS0.0930 INCHES NOMINAL IN
BORE DIAMETER1.5000 INCHES NOMINAL IN
CUP WIDTH0.6875 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
OVERALL WIDTH1.0000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
C820ASQ8Interchangeable
interchangeable cross-reference
interchangeable
18459Interchangeable
interchangeable cross-reference
interchangeable
1N3214Interchangeable
interchangeable cross-reference
interchangeable
WN5091-9Interchangeable
interchangeable cross-reference
interchangeable
1N2159Interchangeable
interchangeable cross-reference
interchangeable
R18459Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SK203-40?
SK203-40 is a BEARING,ROLLER,TAPERED.
What parts can replace SK203-40?
There are 20 known substitutes for SK203-40: C820ASQ8, 18459, 1N3214 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SK203-40?
SK203-40 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-5814. 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