PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 30311-9UKA1
30311-9UKA1 ✓ 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, cup_width: 25.0 MILLIMETERS NOMINAL MM, cone_width: 29.0 MILLIMETERS NOMINAL MM, bore_diameter: 55.0 MILLIMETERS NOMINAL MM, overall_width: 31.5 MILLIMETERS NOMINAL MM, standout_width: 6.5 MILLIMETERS NOMINAL MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-057-9579, 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
30311-9UKA1
NSN: 3110-01-057-9579
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width25.0 MILLIMETERS NOMINAL MM
cone_width29.0 MILLIMETERS NOMINAL MM
bore_diameter55.0 MILLIMETERS NOMINAL MM
overall_width31.5 MILLIMETERS NOMINAL MM
standout_width6.5 MILLIMETERS NOMINAL MM
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius2.5 MILLIMETERS NOMINAL MM
backface_corner_radius2.0 MILLIMETERS NOMINAL MM
overall_outside_diameter120.0 MILLIMETERS NOMINAL MM
retainer_fabrication_methodPRESSED
NSN3110-01-057-9579
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 30311-9UKA1 · 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: STRAIGHT BORE, NORMAL ANGLE
•
CONE CORNER RADIUS: 2.5 MILLIMETERS NOMINAL MM
•
CUP WIDTH: 25.0 MILLIMETERS NOMINAL MM
•
BACKFACE CORNER RADIUS: 2.0 MILLIMETERS NOMINAL MM
•
OVERALL OUTSIDE DIAMETER: 120.0 MILLIMETERS NOMINAL MM
•
CONE WIDTH: 29.0 MILLIMETERS NOMINAL MM
•
RETAINER FABRICATION METHOD: PRESSED
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 DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
CONE CORNER RADIUS2.5 MILLIMETERS NOMINAL MM
CUP WIDTH25.0 MILLIMETERS NOMINAL MM
BACKFACE CORNER RADIUS2.0 MILLIMETERS NOMINAL MM
OVERALL OUTSIDE DIAMETER120.0 MILLIMETERS NOMINAL MM
CONE WIDTH29.0 MILLIMETERS NOMINAL MM
RETAINER FABRICATION METHODPRESSED
STANDOUT WIDTH6.5 MILLIMETERS NOMINAL MM
BORE DIAMETER55.0 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
52-S-2112Interchangeable
interchangeable cross-reference
interchangeable
1118200Interchangeable
interchangeable cross-reference
interchangeable
584369C1Interchangeable
interchangeable cross-reference
interchangeable
30311Interchangeable
interchangeable cross-reference
interchangeable
80ES26T26CTInterchangeable
interchangeable cross-reference
interchangeable
2970Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 30311-9UKA1?
30311-9UKA1 is a BEARING,ROLLER,TAPERED.
What parts can replace 30311-9UKA1?
There are 19 known substitutes for 30311-9UKA1: 52-S-2112, 1118200, 584369C1 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 30311-9UKA1?
30311-9UKA1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-057-9579. 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