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Technical Data Sheet
PartsTable / COMPONENT / 221520
221520 ✓ 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: 1.2795 INCHES NOMINAL IN, outside_diameter: 5.7864 INCHES NOMINAL IN, special_features: HM DUTY SERIES, style_designator: NORMAL ANGLE, backface_corner_radius: 0.1400 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-618-0249, 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
221520
NSN: 3110-00-618-0249
FSC: 3110
CAGE: 26697 — LOAD KING, LLC DIV LOAD KING (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width1.2795 INCHES NOMINAL IN
outside_diameter5.7864 INCHES NOMINAL IN
special_featuresHM DUTY SERIES
style_designatorNORMAL ANGLE
backface_corner_radius0.1400 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-618-0249
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 221520 · 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: 5.7864 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BACKFACE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
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)
SPECIAL FEATURESHM DUTY SERIES
OUTSIDE DIAMETER5.7864 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OVERALL WIDTH1.2795 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1400 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
0210548-4Interchangeable
interchangeable cross-reference
interchangeable
JT9009Interchangeable
interchangeable cross-reference
interchangeable
210548Interchangeable
interchangeable cross-reference
interchangeable
25520Interchangeable
interchangeable cross-reference
interchangeable
130503HInterchangeable
interchangeable cross-reference
interchangeable
4253291-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 221520?
221520 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 221520?
There are 28 known substitutes for 221520: 0210548-4, JT9009, 210548 and 25 more. Substitute compatibility should be verified for your specific system.
Is 221520 still available?
221520 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