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18690-18620DX1S18690 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

18690-18620DX1S18690: 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: 1.3125 INCHES NOMINAL IN, cone_width: 1.6250 INCHES NOMINAL IN, bore_diameter: 1.8125 INCHES NOMINAL IN, overall_width: 1.6250 INCHES NOMINAL IN, standout_width: 0.1562 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-293-8162, 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
18690-18620DX1S18690
NSN: 3110-00-293-8162
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.3125 INCHES NOMINAL IN
cone_width1.6250 INCHES NOMINAL IN
bore_diameter1.8125 INCHES NOMINAL IN
overall_width1.6250 INCHES NOMINAL IN
standout_width0.1562 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.1090 INCHES NOMINAL IN
lubrication_materialOIL LUBRICATING
backface_corner_radius0.0312 INCHES NOMINAL IN
overall_outside_diameter3.1250 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
NSN3110-00-293-8162
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 18690-18620DX1S18690 · 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
•
RETAINER FABRICATION METHOD: PRESSED
•
LUBRICATION MATERIAL: OIL LUBRICATING
•
CUP WIDTH: 1.3125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 3.1250 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0312 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1090 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
RETAINER FABRICATION METHODPRESSED
LUBRICATION MATERIALOIL LUBRICATING
CUP WIDTH1.3125 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH1.6250 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.1250 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0312 INCHES NOMINAL IN
CONE CORNER RADIUS0.1090 INCHES NOMINAL IN
STANDOUT WIDTH0.1562 INCHES NOMINAL IN
CONE WIDTH1.6250 INCHES NOMINAL 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 2
FF-B-187Reference document
Same NSN cross-reference
Reference document — Identification reference
264663R91Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 18690-18620DX1S18690?
18690-18620DX1S18690 is a BEARING,ROLLER,TAPERED.
What parts can replace 18690-18620DX1S18690?
There are 2 known substitutes for 18690-18620DX1S18690: FF-B-187, 264663R91. Substitute compatibility should be verified for your specific system.
What is the NSN for 18690-18620DX1S18690?
18690-18620DX1S18690 is cataloged in the U.S. Government catalog under NSN 3110-00-293-8162. 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.