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HM903249-HM903210 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

HM903249-HM903210: 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: 0.8750 INCHES NOMINAL0.8750 INCHES NOMINAL IN, cone_width: 1.1250 INCHES NOMINAL1.1250 INCHES NOMINAL IN, bore_diameter: 1.7500 INCHES NOMINAL1.7500 INCHES NOMINAL IN, overall_width: 1.2188 INCHES NOMINAL1.2188 INCHES NOMINAL IN, standout_width: 0.3438 INCHES NOMINAL0.3438 INCHES NOMINAL IN, style_designator: STRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-368-8863, 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
HM903249-HM903210
NSN: 3110-01-368-8863
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
cup_width0.8750 INCHES NOMINAL0.8750 INCHES NOMINAL IN
cone_width1.1250 INCHES NOMINAL1.1250 INCHES NOMINAL IN
bore_diameter1.7500 INCHES NOMINAL1.7500 INCHES NOMINAL IN
overall_width1.2188 INCHES NOMINAL1.2188 INCHES NOMINAL IN
standout_width0.3438 INCHES NOMINAL0.3438 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.1400 INCHES NOMINAL0.1400 INCHES NOMINAL IN
backface_corner_radius0.0500 INCHES NOMINAL0.0500 INCHES NOMINAL IN
overall_outside_diameter3.7500 INCHES NOMINAL3.7500 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA CLASS 2AFBMA CLASS 2
NSN3110-01-368-8863
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: HM903249-HM903210 · 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
•
CUP WIDTH: 0.8750 INCHES NOMINAL0.8750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 3.7500 INCHES NOMINAL3.7500 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0500 INCHES NOMINAL0.0500 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.3438 INCHES NOMINAL0.3438 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
CUP WIDTH0.8750 INCHES NOMINAL0.8750 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLESTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH1.2188 INCHES NOMINAL1.2188 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.7500 INCHES NOMINAL3.7500 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0500 INCHES NOMINAL0.0500 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.3438 INCHES NOMINAL0.3438 INCHES NOMINAL IN
CONE WIDTH1.1250 INCHES NOMINAL1.1250 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2AFBMA CLASS 2
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
9414917Same 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 HM903249-HM903210?
HM903249-HM903210 is a BEARING,ROLLER,TAPERED.
What parts can replace HM903249-HM903210?
There is 1 known substitute for HM903249-HM903210: 9414917. Substitute compatibility should be verified for your specific system.
What is the NSN for HM903249-HM903210?
HM903249-HM903210 is cataloged in the U.S. Government catalog under NSN 3110-01-368-8863. 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.