PartsTable
Technical Data Sheet

HM256849/HM256810 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

HM256849/HM256810: 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: 5.3750 INCHES NOMINAL IN, cone_width: 6.8750 INCHES NOMINAL IN, bore_diameter: 11.8125 INCHES NOMINAL IN, overall_width: 5.3750 INCHES NOMINAL IN, standout_width: 1.5000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-448-6018, 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
HM256849/HM256810
NSN: 3110-01-448-6018
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width5.3750 INCHES NOMINAL IN
cone_width6.8750 INCHES NOMINAL IN
bore_diameter11.8125 INCHES NOMINAL IN
overall_width5.3750 INCHES NOMINAL IN
standout_width1.5000 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.2500 INCHES NOMINAL IN
backface_corner_radius0.0600 INCHES NOMINAL IN
overall_outside_diameter16.6250 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA CLASS 2
NSN3110-01-448-6018
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: HM256849/HM256810 · 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: 5.3750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 16.6250 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0600 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.2500 INCHES NOMINAL IN
•
STANDOUT WIDTH: 1.5000 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 WIDTH5.3750 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH5.3750 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER16.6250 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0600 INCHES NOMINAL IN
CONE CORNER RADIUS0.2500 INCHES NOMINAL IN
STANDOUT WIDTH1.5000 INCHES NOMINAL IN
CONE WIDTH6.8750 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA 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 2
HM256810/HM256849Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2E3-00295 IT NO 53Same 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
Ready to buy HM256849/HM256810?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is HM256849/HM256810?
HM256849/HM256810 is a BEARING,ROLLER,TAPERED.
What parts can replace HM256849/HM256810?
There are 2 known substitutes for HM256849/HM256810: HM256810/HM256849, 2E3-00295 IT NO 53. Substitute compatibility should be verified for your specific system.
What is the NSN for HM256849/HM256810?
HM256849/HM256810 is cataloged in the U.S. Government catalog under NSN 3110-01-448-6018. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — HM256849/HM256810

✓ 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.