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Technical Data Sheet
PartsTable / COMPONENT / 34478
34478 ✓ 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 length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT, material: ALUMINUM ALLOY 2024, leg_thickness: 0.050 INCHES NOMINAL IN, heat_treatment: O-ANNEALED, overall_height: 2.350 INCHES NOMINAL IN, first_tip_style: SQUARE END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0575, 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
34478
NSN: 3110-00-100-0575
FSC: 3110
CAGE: 3D6E9 — MERITOR INDUSTRIAL PRODUCTS, LLC (USA)
SPECIFICATIONS
length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
materialALUMINUM ALLOY 2024
leg_thickness0.050 INCHES NOMINAL IN
heat_treatmentO-ANNEALED
overall_height2.350 INCHES NOMINAL IN
first_tip_styleSQUARE END
top_flange_width2.000 INCHES NOMINAL IN
basic_shape_styleT SHAPE
fabrication_methodEXTRUDED
left_top_inside_angle90.0 DEGREES NOMINAL
right_top_inside_angle90.0 DEGREES NOMINAL
weight_per_unit_measure0.259 POUNDS PER LINEAR FOOT LBS
NSN3110-00-100-0575
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 34478 · 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
•
BACKFACE CORNER RADIUS: 0.0800 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
OUTSIDE DIAMETER: 4.7812 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)
BACKFACE CORNER RADIUS0.0800 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
OVERALL WIDTH0.6875 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OUTSIDE DIAMETER4.7812 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
RW-511Interchangeable
interchangeable cross-reference
interchangeable
1454-CInterchangeable
interchangeable cross-reference
interchangeable
1069Interchangeable
interchangeable cross-reference
interchangeable
54A11957Interchangeable
interchangeable cross-reference
interchangeable
A15M55049Interchangeable
interchangeable cross-reference
interchangeable
131-17-12-038Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 34478?
34478 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 34478?
There are 27 known substitutes for 34478: RW-511, 1454-C, 1069 and 24 more. Substitute compatibility should be verified for your specific system.
Is 34478 still available?
34478 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026