PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 385397-B 01-408
385397-B 01-408 ✓ 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, overall_width: 1.3750 INCHES NOMINAL IN, outside_diameter: 8.1250 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, backface_corner_radius: 0.1250 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA CLASS 2. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0340, 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
385397-B 01-408
NSN: 3110-00-100-0340
FSC: 3110
CAGE: 17454 — TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width1.3750 INCHES NOMINAL IN
outside_diameter8.1250 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
backface_corner_radius0.1250 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-0340
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 385397-B 01-408 · 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
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STYLE DESIGNATOR: NORMAL ANGLE
•
MATERIAL: STEEL OVERALL
•
OUTSIDE DIAMETER: 8.1250 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 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)
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OVERALL WIDTH1.3750 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
MATERIALSTEEL OVERALL
OUTSIDE DIAMETER8.1250 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
1729Interchangeable
interchangeable cross-reference
interchangeable
R5AInterchangeable
interchangeable cross-reference
interchangeable
17X165Interchangeable
interchangeable cross-reference
interchangeable
792Interchangeable
interchangeable cross-reference
interchangeable
M216Interchangeable
interchangeable cross-reference
interchangeable
2694Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 385397-B 01-408?
385397-B 01-408 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 385397-B 01-408?
There are 32 known substitutes for 385397-B 01-408: 1729, R5A, 17X165 and 29 more. Substitute compatibility should be verified for your specific system.
Is 385397-B 01-408 still available?
385397-B 01-408 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026