PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 34306-34478
34306-34478 ✓ 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 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, bore_diameter: 3.0630 INCHES NOMINAL IN, inner_ring_width: 0.9648 INCHES NOMINAL IN, outer_ring_width: 0.6875 INCHES NOMINAL IN, style_designator: ANGULAR CONTACT, SPHERICAL ROLLERS, SEPARABLE, end_item_identification: ARMORED CARRIER,M2 AND M3. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-5348, 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
34306-34478
NSN: 3110-00-100-5348
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter3.0630 INCHES NOMINAL IN
inner_ring_width0.9648 INCHES NOMINAL IN
outer_ring_width0.6875 INCHES NOMINAL IN
style_designatorANGULAR CONTACT, SPHERICAL ROLLERS, SEPARABLE
end_item_identificationARMORED CARRIER,M2 AND M3
overall_outside_diameter4.7817 INCHES NOMINAL IN
retainer_fabrication_methodMACHINED
material_document_and_classificationMIL-STD-130 MIL STD ALL MATERIAL RESPONSES OVERALL
NSN3110-00-100-5348
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 34306-34478 · 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
•
STANDOUT WIDTH: 0.2813 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
BORE DIAMETER: 3.0625 INCHES NOMINAL IN
•
CUP WIDTH: 0.6875 INCHES NOMINAL IN
•
CONE WIDTH: 0.9060 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
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 WIDTH0.2813 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
BORE DIAMETER3.0625 INCHES NOMINAL IN
CUP WIDTH0.6875 INCHES NOMINAL IN
CONE WIDTH0.9060 INCHES NOMINAL IN
OVERALL WIDTH0.9688 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
SPECIAL FEATURESROLLER BEARING STYLE: NO. 370 OF OLD FIIG A04400;RETAINER FABRICATION METHOD: ANY ACCEPTABLE;SEPERATION FEATURE: INCLUDED;BEARING OUTSIDE DIAMETER: 4.7812 IN. NOM. IN
BACKFACE CORNER RADIUS0.0800 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
7247213Interchangeable
interchangeable cross-reference
interchangeable
MS3057-32Interchangeable
interchangeable cross-reference
interchangeable
RM386Interchangeable
interchangeable cross-reference
interchangeable
34306-34478Interchangeable
interchangeable cross-reference
interchangeable
11629138Interchangeable
interchangeable cross-reference
interchangeable
11629138-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 34306-34478?
34306-34478 is a BEARING,ROLLER,TAPERED.
What parts can replace 34306-34478?
There are 11 known substitutes for 34306-34478: 7247213, MS3057-32, RM386 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 34306-34478?
34306-34478 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-5348. 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