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Technical Data Sheet
PartsTable / COMPONENT / 228278-4
228278-4 ✓ 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: 25.00 MILLIMETERS NOMINAL MM, overall_width: 17.0 MILLIMETERS NOMINAL MM, load_direction: ANGULAR, surface_finish: GROUND, style_designator: COUNTERBORED OUTER RING, NON-SEPARABLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-8010, 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
228278-4
NSN: 3110-00-156-8010
FSC: 3110
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter25.00 MILLIMETERS NOMINAL MM
overall_width17.0 MILLIMETERS NOMINAL MM
load_directionANGULAR
surface_finishGROUND
style_designatorCOUNTERBORED OUTER RING, NON-SEPARABLE
overall_outside_diameter130.00 MILLIMETERS NOMINAL MM
bearing_preload_designationLIGHT
nondefinitive_spec/std_data00 GRADE AND 134 TYPE
retainer_fabrication_methodMACHINED
standard_tolerance_designationABEC NO.1
lubrication_material_document_and_classificationMIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-156-8010
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 228278-4 · 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
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
•
OVERALL OUTSIDE DIAMETER: 130.00 MILLIMETERS NOMINAL MM
•
MATERIAL: GREASE LUBRICATION
•
LOAD DIRECTION: ANGULAR
•
RETAINER FABRICATION METHOD: MACHINED
•
BEARING PRELOAD DESIGNATION: LIGHT
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)
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
OVERALL OUTSIDE DIAMETER130.00 MILLIMETERS NOMINAL MM
MATERIALGREASE LUBRICATION
LOAD DIRECTIONANGULAR
MATERIALGREASE LUBRICATION
LOAD DIRECTIONANGULAR
RETAINER FABRICATION METHODMACHINED
BEARING PRELOAD DESIGNATIONLIGHT
STANDARD TOLERANCE DESIGNATIONABEC NO.1
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
9676M40P02Interchangeable
interchangeable cross-reference
interchangeable
42H26128P02Interchangeable
interchangeable cross-reference
interchangeable
7-00188Interchangeable
interchangeable cross-reference
interchangeable
K168AInterchangeable
interchangeable cross-reference
interchangeable
S16001Interchangeable
interchangeable cross-reference
interchangeable
7305Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 228278-4?
228278-4 is a BEARING,ROLLER,TAPERED.
What parts can replace 228278-4?
There are 27 known substitutes for 228278-4: 9676M40P02, 42H26128P02, 7-00188 and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 228278-4?
228278-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-8010. 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