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28985-28921 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

28985-28921: 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 OVERALL, cup_width: 0.7810 INCHES NOMINAL IN, cone_width: 1.0000 INCHES NOMINAL IN, bore_diameter: 2.3750 INCHES MINIMUM AND 2.3755 INCHES MAXIMUM IN, overall_width: 1.0000 INCHES NOMINAL IN, standout_width: 0.2190 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-062-9968, 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
28985-28921
NSN: 3110-00-062-9968
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.7810 INCHES NOMINAL IN
cone_width1.0000 INCHES NOMINAL IN
bore_diameter2.3750 INCHES MINIMUM AND 2.3755 INCHES MAXIMUM IN
overall_width1.0000 INCHES NOMINAL IN
standout_width0.2190 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.1250 INCHES NOMINAL IN
overall_outside_diameter3.9370 INCHES MINIMUM AND 3.9380 INCHES MAXIMUM IN
NSN3110-00-062-9968
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 28985-28921 · 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: 0.7810 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 3.9370 INCHES MINIMUM AND 3.9380 INCHES MAXIMUM IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.2190 INCHES NOMINAL IN
•
CONE WIDTH: 1.0000 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
CUP WIDTH0.7810 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH1.0000 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.9370 INCHES MINIMUM AND 3.9380 INCHES MAXIMUM IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.2190 INCHES NOMINAL IN
CONE WIDTH1.0000 INCHES NOMINAL IN
BORE DIAMETER2.3750 INCHES MINIMUM AND 2.3755 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
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 1
6462C86Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 28985-28921?
28985-28921 is a BEARING,ROLLER,TAPERED.
What parts can replace 28985-28921?
There is 1 known substitute for 28985-28921: 6462C86. Substitute compatibility should be verified for your specific system.
What is the NSN for 28985-28921?
28985-28921 is cataloged in the U.S. Government catalog under NSN 3110-00-062-9968. 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.