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C311740 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

C311740: BEARING,ROLLER,TAPERED.

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 SEPARATOR SLUG, cup_width: 1.9245 INCHES MINIMUM AND 1.9505 INCHES MAXIMUM IN, cone_width: 2.4325 INCHES MINIMUM AND 2.4425 INCHES MAXIMUM IN, bore_diameter: 0.6675 INCHES MINIMUM AND 0.6685 INCHES MAXIMUM IN, overall_width: 2.4275 INCHES MINIMUM AND 2.4515 INCHES MAXIMUM IN, standout_width: 5.0000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-468-6840, 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
C311740
NSN: 3110-01-468-6840
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 3X894 — CONTROL FLOW, INC. DBA CONTROL FLOW INC (USA)
SPECIFICATIONS
materialSTEEL SEPARATOR SLUG
cup_width1.9245 INCHES MINIMUM AND 1.9505 INCHES MAXIMUM IN
cone_width2.4325 INCHES MINIMUM AND 2.4425 INCHES MAXIMUM IN
bore_diameter0.6675 INCHES MINIMUM AND 0.6685 INCHES MAXIMUM IN
overall_width2.4275 INCHES MINIMUM AND 2.4515 INCHES MAXIMUM IN
standout_width5.0000 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.2400 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
backface_corner_radius0.1300 INCHES NOMINAL IN
overall_outside_diameter12.3750 INCHES MINIMUM AND 12.3770 INCHES MAXIMUM IN
part_name_assigned_by_controlling_agencyBEARING, ROLLER, 8.6880 I/D
NSN3110-01-468-6840
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: C311740 · 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
•
CUP WIDTH: 1.9245 INCHES MINIMUM AND 1.9505 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 12.3750 INCHES MINIMUM AND 12.3770 INCHES MAXIMUM IN
•
BACKFACE CORNER RADIUS: 0.1300 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.2400 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
•
STANDOUT WIDTH: 5.0000 INCHES NOMINAL IN
•
CONE WIDTH: 2.4325 INCHES MINIMUM AND 2.4425 INCHES MAXIMUM 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
CUP WIDTH1.9245 INCHES MINIMUM AND 1.9505 INCHES MAXIMUM IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH2.4275 INCHES MINIMUM AND 2.4515 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER12.3750 INCHES MINIMUM AND 12.3770 INCHES MAXIMUM IN
BACKFACE CORNER RADIUS0.1300 INCHES NOMINAL IN
CONE CORNER RADIUS0.2400 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
STANDOUT WIDTH5.0000 INCHES NOMINAL IN
CONE WIDTH2.4325 INCHES MINIMUM AND 2.4425 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYBEARING, ROLLER, 8.6880 I/D
BORE DIAMETER0.6675 INCHES MINIMUM AND 0.6685 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C311740?
C311740 is a BEARING,ROLLER,TAPERED.
What is the NSN for C311740?
C311740 is cataloged in the U.S. Government catalog under NSN 3110-01-468-6840. 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.