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Technical Data Sheet
PartsTable / COMPONENT / A9945A
A9945A ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

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: 0.6250 INCHES NOMINAL IN, cone_width: 0.8598 INCHES NOMINAL IN, bore_diameter: 0.7500 INCHES NOMINAL IN, overall_width: 0.8750 INCHES NOMINAL IN, standout_width: 0.2500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-5804, 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
A9945A
NSN: 3110-00-100-5804
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.6250 INCHES NOMINAL IN
cone_width0.8598 INCHES NOMINAL IN
bore_diameter0.7500 INCHES NOMINAL IN
overall_width0.8750 INCHES NOMINAL IN
standout_width0.2500 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, STEEP ANGLE
cone_corner_radius0.0620 INCHES NOMINAL IN
backface_corner_radius0.0930 INCHES NOMINAL IN
overall_outside_diameter2.1250 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-5804
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A9945A · 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
•
CONE CORNER RADIUS: 0.0620 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
OVERALL OUTSIDE DIAMETER: 2.1250 INCHES NOMINAL IN
•
CONE WIDTH: 0.8598 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CUP WIDTH: 0.6250 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0930 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.2500 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 (FLIS)
CONE CORNER RADIUS0.0620 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
OVERALL OUTSIDE DIAMETER2.1250 INCHES NOMINAL IN
CONE WIDTH0.8598 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CUP WIDTH0.6250 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0930 INCHES NOMINAL IN
STANDOUT WIDTH0.2500 INCHES NOMINAL IN
BORE DIAMETER0.7500 INCHES NOMINAL IN
OVERALL WIDTH0.8750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
H924045H924010Interchangeable
interchangeable cross-reference
interchangeable
A-A-59651Interchangeable
interchangeable cross-reference
interchangeable
A-A-59651-080Interchangeable
interchangeable cross-reference
interchangeable
64AX37Interchangeable
interchangeable cross-reference
interchangeable
53387Interchangeable
interchangeable cross-reference
interchangeable
310470Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A9945A?
A9945A is a BEARING,ROLLER,TAPERED.
What parts can replace A9945A?
There are 28 known substitutes for A9945A: H924045H924010, A-A-59651, A-A-59651-080 and 25 more. Substitute compatibility should be verified for your specific system.
Is A9945A still available?
A9945A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026