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Technical Data Sheet
PartsTable / COMPONENT / SK203-45
SK203-45 ✓ 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: 0.6250 INCHES NOMINAL IN, cone_width: 0.7620 INCHES NOMINAL IN, bore_diameter: 1.0000 INCHES NOMINAL IN, overall_width: 0.7813 INCHES NOMINAL IN, standout_width: 0.1563 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 3110-00-100-4454, 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
SK203-45
NSN: 3110-00-100-4454
FSC: 3110
CAGE: 77237 — DANA OFF HIGHWAY PRODUCTS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.6250 INCHES NOMINAL IN
cone_width0.7620 INCHES NOMINAL IN
bore_diameter1.0000 INCHES NOMINAL IN
overall_width0.7813 INCHES NOMINAL IN
standout_width0.1563 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0460 INCHES NOMINAL IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter2.3125 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-4454
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: SK203-45 · 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: 0.1563 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CUP WIDTH: 0.6250 INCHES NOMINAL IN
•
CONE WIDTH: 0.7620 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0460 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
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)
OVERALL WIDTH0.7813 INCHES NOMINAL IN
STANDOUT WIDTH0.1563 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CUP WIDTH0.6250 INCHES NOMINAL IN
CONE WIDTH0.7620 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0460 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
BORE DIAMETER1.0000 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER2.3125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
001-1002-00-0-479Interchangeable
interchangeable cross-reference
interchangeable
301-24Interchangeable
interchangeable cross-reference
interchangeable
FTSM7Interchangeable
interchangeable cross-reference
interchangeable
1793-3Interchangeable
interchangeable cross-reference
interchangeable
B-2Interchangeable
interchangeable cross-reference
interchangeable
M47-8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SK203-45?
SK203-45 is a BEARING,ROLLER,TAPERED.
What parts can replace SK203-45?
There are 18 known substitutes for SK203-45: 001-1002-00-0-479, 301-24, FTSM7 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SK203-45?
SK203-45 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-4454. 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