PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 623-612B
623-612B ✓ 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: 1.2500 INCHES NOMINAL IN, cone_width: 1.6250 INCHES NOMINAL IN, flange_width: 0.2813 INCHES NOMINAL IN, bore_diameter: 2.2500 INCHES NOMINAL IN, overall_width: 1.6250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-227-2441, 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
623-612B
NSN: 3110-00-227-2441
FSC: 3110
CAGE: 0LTL1 — NTN BEARING CORPORATION OF AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.2500 INCHES NOMINAL IN
cone_width1.6250 INCHES NOMINAL IN
flange_width0.2813 INCHES NOMINAL IN
bore_diameter2.2500 INCHES NOMINAL IN
overall_width1.6250 INCHES NOMINAL IN
standout_width0.6562 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, FLANGED CUP, NORMAL ANGLE
cone_corner_radius0.1400 INCHES NOMINAL IN
cup_outside_diameter4.7500 INCHES NOMINAL IN
backface_corner_radius0.1250 INCHES NOMINAL IN
flange_outside_diameter5.0312 INCHES NOMINAL IN
NSN3110-00-227-2441
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 623-612B · 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: 0.1400 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STANDOUT WIDTH: 0.6562 INCHES NOMINAL IN
•
BORE DIAMETER: 2.2500 INCHES NOMINAL IN
•
CUP WIDTH: 1.2500 INCHES NOMINAL IN
•
CONE WIDTH: 1.6250 INCHES NOMINAL IN
•
FLANGE WIDTH: 0.2813 INCHES NOMINAL IN
•
CUP OUTSIDE DIAMETER: 4.7500 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 RADIUS0.1400 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STANDOUT WIDTH0.6562 INCHES NOMINAL IN
BORE DIAMETER2.2500 INCHES NOMINAL IN
CUP WIDTH1.2500 INCHES NOMINAL IN
CONE WIDTH1.6250 INCHES NOMINAL IN
FLANGE WIDTH0.2813 INCHES NOMINAL IN
CUP OUTSIDE DIAMETER4.7500 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, FLANGED CUP, NORMAL ANGLE
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
A540T053-102Interchangeable
interchangeable cross-reference
interchangeable
3151678Interchangeable
interchangeable cross-reference
interchangeable
STSMTURSNWHITEInterchangeable
interchangeable cross-reference
interchangeable
AP3803T04Interchangeable
interchangeable cross-reference
interchangeable
921500Interchangeable
interchangeable cross-reference
interchangeable
AFP1860T040404Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 623-612B?
623-612B is a BEARING,ROLLER,TAPERED.
What parts can replace 623-612B?
There are 6 known substitutes for 623-612B: A540T053-102, 3151678, STSMTURSNWHITE and 3 more. Substitute compatibility should be verified for your specific system.
Is 623-612B still available?
623-612B 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