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B3305 — CUP,TAPERED ROLLER BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

B3305: CUP,TAPERED ROLLER BEARING.

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, cup_width: 17.0 MILLIMETERS NOMINAL MM, bore_shape: STRAIGHT, cone_width: 0.7810 INCHES NOMINAL IN, corner_shape: SQUARE ALL CORNERS, flange_width: 0.1563 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-0634, 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
B3305
NSN: 3110-00-100-0634
NIINs: 001000634, 002255387
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 14541 — COOPER MACHINERY SERVICES LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width17.0 MILLIMETERS NOMINAL MM
bore_shapeSTRAIGHT
cone_width0.7810 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
flange_width0.1563 INCHES NOMINAL IN
bore_diameter0.7500 INCHES NOMINAL IN
hole_diameter1.396 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN
overall_width0.5313 INCHES NOMINAL IN
alignment_typeRIGID
load_directionRADIAL
overall_length1.2500 INCHES NOMINAL IN
NSN3110-00-100-0634
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B3305 · 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
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
SUBSTITUTES & CROSS-REFERENCES 5
604920Reference document
Same NSN cross-reference
Reference document — Secondary reference
3B5790Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
02820Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
52879Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
707063Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B3305?
B3305 is a CUP,TAPERED ROLLER BEARING.
What parts can replace B3305?
There are 5 known substitutes for B3305: 604920, 3B5790, 02820 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B3305?
B3305 is cataloged in the U.S. Government catalog under NSN 3110-00-100-0634. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.