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Technical Data Sheet
PartsTable / MRO / 521910
521910 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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: PLASTIC, POLYETHYLENE (PP) TUBE, temp_rating: -40.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF, overall_width: 1.1875 INCHES NOMINAL IN, exterior_color: BLUE, vacuum_in_torr: 50.8, inside_diameter: 0.500 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 3110-00-100-0605, 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
MRO→ MRO_GENERAL→ 521910
NSN: 3110-00-100-0605
FSC: 3110
CAGE: 17454 — TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP) TUBE
temp_rating-40.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF
overall_width1.1875 INCHES NOMINAL IN
exterior_colorBLUE
vacuum_in_torr50.8
inside_diameter0.500 INCHES NOMINAL IN
outside_diameter0.940 INCHES NOMINAL IN
special_featuresDUTY CLASS L SERIES
style_designatorNORMAL ANGLE
operating_pressure1250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
burst_test_pressure5000.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS
backface_corner_radius0.1250 INCHES NOMINAL IN
NSN3110-00-100-0605
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 521910 · 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
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
OUTSIDE DIAMETER: 7.0000 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 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)
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OUTSIDE DIAMETER7.0000 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
OVERALL WIDTH1.1875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
K-500-CH-1349Interchangeable
interchangeable cross-reference
interchangeable
MS14314-3XInterchangeable
interchangeable cross-reference
interchangeable
W6506BInterchangeable
interchangeable cross-reference
interchangeable
4730PL0773105Interchangeable
interchangeable cross-reference
interchangeable
2EH663Interchangeable
interchangeable cross-reference
interchangeable
52190Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 521910?
521910 is a CUP,TAPERED ROLLER BEARING. It is classified as a MRO (MRO_GENERAL).
What parts can replace 521910?
There are 22 known substitutes for 521910: K-500-CH-1349, MS14314-3X, W6506B and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 521910?
521910 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0605. 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