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Technical Data Sheet
PartsTable / COMPONENT / 4255218
4255218 ✓ 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: ALUMINUM OVERALL, head_style: OVAL/TRUSS, grip_length: 0.815 INCHES NOMINAL IN, head_height: 0.050 INCHES MAXIMUM IN, shank_style: SELF-PLUGGING SHANK W/GROOVED END FOR LOCKING, shank_diameter: 0.187 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 3110-00-100-0580, 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
4255218
NSN: 3110-00-100-0580
FSC: 3110
CAGE: 89926 — NEW HOLLAND CONSTRUCTION (USA)
SPECIFICATIONS
materialALUMINUM OVERALL
head_styleOVAL/TRUSS
grip_length0.815 INCHES NOMINAL IN
head_height0.050 INCHES MAXIMUM IN
shank_styleSELF-PLUGGING SHANK W/GROOVED END FOR LOCKING
shank_diameter0.187 INCHES NOMINAL IN
special_featuresRECOMMENDED HOLE SIZE: .192 - .196 INCHES; GRIP RANGE: .501/.625 INCHES IN
head_major_diameter0.375 INCHES NOMINAL IN
end_item_identification4210-01-622-0440
part_name_assigned_by_controlling_agencyRIVET, BLD, FLT
NSN3110-00-100-0580
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 4255218 · 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
•
OUTSIDE DIAMETER: 4.1250 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0800 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
•
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)
OVERALL WIDTH0.6250 INCHES NOMINAL IN
OUTSIDE DIAMETER4.1250 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0800 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
39250Interchangeable
interchangeable cross-reference
interchangeable
FFB187/01-454Interchangeable
interchangeable cross-reference
interchangeable
39250-39412Interchangeable
interchangeable cross-reference
interchangeable
AA59649-454Interchangeable
interchangeable cross-reference
interchangeable
21076Interchangeable
interchangeable cross-reference
interchangeable
M21076Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4255218?
4255218 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 4255218?
There are 20 known substitutes for 4255218: 39250, FFB187/01-454, 39250-39412 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4255218?
4255218 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0580. 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