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Technical Data Sheet
PartsTable / COMPONENT / 394AB
394AB ✓ 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: 0.1870 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, FLANGED, backface_corner_radius: 0.0470 INCHES NOMINAL IN, flange_outside_diameter: 4.5147 INCHES NOMINAL IN, outer_ring_outside_diameter: 4.3307 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 3110-00-151-8372, 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
394AB
NSN: 3110-00-151-8372
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flange_width0.1870 INCHES NOMINAL IN
style_designatorNORMAL ANGLE, FLANGED
backface_corner_radius0.0470 INCHES NOMINAL IN
flange_outside_diameter4.5147 INCHES NOMINAL IN
outer_ring_outside_diameter4.3307 INCHES NOMINAL IN
NSN3110-00-151-8372
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 394AB · 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 OUTSIDE DIAMETER: 4.5147 INCHES NOMINAL IN
•
FLANGE WIDTH: 0.1870 INCHES NOMINAL IN
•
OUTER RING OUTSIDE DIAMETER: 4.3307 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0470 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE, FLANGED
•
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 OUTSIDE DIAMETER4.5147 INCHES NOMINAL IN
FLANGE WIDTH0.1870 INCHES NOMINAL IN
OUTER RING OUTSIDE DIAMETER4.3307 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0470 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE, FLANGED
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
D31129Interchangeable
interchangeable cross-reference
interchangeable
7EQH4221Interchangeable
interchangeable cross-reference
interchangeable
774025Interchangeable
interchangeable cross-reference
interchangeable
339A176Interchangeable
interchangeable cross-reference
interchangeable
17119-17244BInterchangeable
interchangeable cross-reference
interchangeable
FFB187/02-019Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 394AB?
394AB is a CUP,TAPERED ROLLER BEARING.
What parts can replace 394AB?
There are 11 known substitutes for 394AB: D31129, 7EQH4221, 774025 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 394AB?
394AB is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-151-8372. 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