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26840R — CUP,TAPERED ROLLER BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

26840R: 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, overall_width: 1.7500 INCHES NOMINAL IN, outside_diameter: 3.8750 INCHES NOMINAL IN, special_features: OIL HOLE AND CHANNEL, style_designator: DOUBLE CUP, STEEP ANGLE, backface_corner_radius: 0.0630 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-143-7591, 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
26840R
NSN: 3110-00-143-7591
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width1.7500 INCHES NOMINAL IN
outside_diameter3.8750 INCHES NOMINAL IN
special_featuresOIL HOLE AND CHANNEL
style_designatorDOUBLE CUP, STEEP ANGLE
backface_corner_radius0.0630 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-143-7591
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 26840R · 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
•
STYLE DESIGNATOR: DOUBLE CUP, STEEP ANGLE
•
OUTSIDE DIAMETER: 3.8750 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0630 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
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
STYLE DESIGNATORDOUBLE CUP, STEEP ANGLE
OVERALL WIDTH1.7500 INCHES NOMINAL IN
OUTSIDE DIAMETER3.8750 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0630 INCHES NOMINAL IN
SPECIAL FEATURESOIL HOLE AND CHANNEL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
53390DReference document
Same NSN cross-reference
Reference document — Secondary reference
313382Reference document
Same NSN cross-reference
Reference document — Secondary reference
147713Reference document
Same NSN cross-reference
Reference document — Secondary reference
53390Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 26840R?
26840R is a CUP,TAPERED ROLLER BEARING.
What parts can replace 26840R?
There are 4 known substitutes for 26840R: 53390D, 313382, 147713 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26840R?
26840R is cataloged in the U.S. Government catalog under NSN 3110-00-143-7591. 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.