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1779 AND 1729 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

1779 AND 1729: 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 COMP 4320 OR STEEL COMP 4620 OR STEEL COMP 8620 OR STEEL COMP E52100 CONE, cup_width: 0.6250 INCHES NOMINAL IN, cone_width: 0.7810 INCHES NOMINAL IN, bore_diameter: 0.9375 INCHES NOMINAL IN, overall_width: 0.7625 INCHES NOMINAL IN, alignment_type: RIGID. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-4449, 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
1779 AND 1729
NSN: 3110-00-100-4449
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 4320 OR STEEL COMP 4620 OR STEEL COMP 8620 OR STEEL COMP E52100 CONE
cup_width0.6250 INCHES NOMINAL IN
cone_width0.7810 INCHES NOMINAL IN
bore_diameter0.9375 INCHES NOMINAL IN
overall_width0.7625 INCHES NOMINAL IN
alignment_typeRIGID
standout_width0.1375 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0310 INCHES NOMINAL IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter2.2400 INCHES NOMINAL IN
internal_fit-up_designationSTANDARD
NSN3110-00-100-4449
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 1779 AND 1729 · 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
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
CUP WIDTH: 0.6250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A322 ASSN STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE CONE
•
OVERALL OUTSIDE DIAMETER: 2.2400 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
INTERNAL FIT-UP DESIGNATIONSTANDARD
CUP WIDTH0.6250 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A322 ASSN STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE CONE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A322 ASSN STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE CUP
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A322 ASSN STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE ROLLER
OVERALL WIDTH0.7625 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER2.2400 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0460 INCHES NOMINAL IN
CONE CORNER RADIUS0.0310 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 9
1779-1729Reference document
Same NSN cross-reference
Reference document — Secondary reference
13311DAReference document
Same NSN cross-reference
Reference document — Secondary reference
BF140Reference document
Same NSN cross-reference
Reference document — Secondary reference
1331DReference document
Same NSN cross-reference
Reference document — Secondary reference
DH4264Reference document
Same NSN cross-reference
Reference document — Secondary reference
DH264Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1779 AND 1729?
1779 AND 1729 is a BEARING,ROLLER,TAPERED.
What parts can replace 1779 AND 1729?
There are 9 known substitutes for 1779 AND 1729: 1779-1729, 13311DA, BF140 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1779 AND 1729?
1779 AND 1729 is cataloged in the U.S. Government catalog under NSN 3110-00-100-4449. 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.