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Technical Data Sheet

LM739749/LM739710 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

LM739749/LM739710: 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 cup_width: 30.162 MILLIMETERS NOMINAL30.162 MILLIMETERS NOMINAL MM, cone_width: 39.688 MILLIMETERS NOMINAL39.688 MILLIMETERS NOMINAL MM, bore_diameter: 196.850 MILLIMETERS NOMINAL196.850 MILLIMETERS NOMINAL MM, overall_width: 39.688 MILLIMETERS NOMINAL39.688 MILLIMETERS NOMINAL MM, standout_width: 9.5260 MILLIMETERS NOMINAL9.5260 MILLIMETERS NOMINAL MM, style_designator: STRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-365-1815, 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
LM739749/LM739710
NSN: 3110-01-365-1815
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
cup_width30.162 MILLIMETERS NOMINAL30.162 MILLIMETERS NOMINAL MM
cone_width39.688 MILLIMETERS NOMINAL39.688 MILLIMETERS NOMINAL MM
bore_diameter196.850 MILLIMETERS NOMINAL196.850 MILLIMETERS NOMINAL MM
overall_width39.688 MILLIMETERS NOMINAL39.688 MILLIMETERS NOMINAL MM
standout_width9.5260 MILLIMETERS NOMINAL9.5260 MILLIMETERS NOMINAL MM
style_designatorSTRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius3.5 MILLIMETERS NOMINAL3.5 MILLIMETERS NOMINAL MM
backface_corner_radius3.3 MILLIMETERS NOMINAL3.3 MILLIMETERS NOMINAL MM
overall_outside_diameter257.175 MILLIMETERS NOMINAL257.175 MILLIMETERS NOMINAL MM
NSN3110-01-365-1815
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: LM739749/LM739710 · 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: 30.162 MILLIMETERS NOMINAL30.162 MILLIMETERS NOMINAL MM
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 257.175 MILLIMETERS NOMINAL257.175 MILLIMETERS NOMINAL MM
•
BACKFACE CORNER RADIUS: 3.3 MILLIMETERS NOMINAL3.3 MILLIMETERS NOMINAL MM
•
CONE CORNER RADIUS: 3.5 MILLIMETERS NOMINAL3.5 MILLIMETERS NOMINAL MM
•
STANDOUT WIDTH: 9.5260 MILLIMETERS NOMINAL9.5260 MILLIMETERS NOMINAL MM
•
CONE WIDTH: 39.688 MILLIMETERS NOMINAL39.688 MILLIMETERS NOMINAL MM
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 WIDTH30.162 MILLIMETERS NOMINAL30.162 MILLIMETERS NOMINAL MM
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH39.688 MILLIMETERS NOMINAL39.688 MILLIMETERS NOMINAL MM
OVERALL OUTSIDE DIAMETER257.175 MILLIMETERS NOMINAL257.175 MILLIMETERS NOMINAL MM
BACKFACE CORNER RADIUS3.3 MILLIMETERS NOMINAL3.3 MILLIMETERS NOMINAL MM
CONE CORNER RADIUS3.5 MILLIMETERS NOMINAL3.5 MILLIMETERS NOMINAL MM
STANDOUT WIDTH9.5260 MILLIMETERS NOMINAL9.5260 MILLIMETERS NOMINAL MM
CONE WIDTH39.688 MILLIMETERS NOMINAL39.688 MILLIMETERS NOMINAL MM
BORE DIAMETER196.850 MILLIMETERS NOMINAL196.850 MILLIMETERS NOMINAL MM
SUBSTITUTES & CROSS-REFERENCES 2
851390Reference document
Same NSN cross-reference
Reference document — Secondary reference
851389Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is LM739749/LM739710?
LM739749/LM739710 is a BEARING,ROLLER,TAPERED.
What parts can replace LM739749/LM739710?
There are 2 known substitutes for LM739749/LM739710: 851390, 851389. Substitute compatibility should be verified for your specific system.
What is the NSN for LM739749/LM739710?
LM739749/LM739710 is cataloged in the U.S. Government catalog under NSN 3110-01-365-1815. 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.