PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 748-743X
748-743X ✓ 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: 1.3780 INCHES NOMINAL IN, cone_width: 1.8375 INCHES NOMINAL IN, bore_diameter: 3.1496 INCHES NOMINAL IN, overall_width: 1.7502 INCHES NOMINAL IN, standout_width: 0.3722 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-869-3671, 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
748-743X
NSN: 3110-00-869-3671
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.3780 INCHES NOMINAL IN
cone_width1.8375 INCHES NOMINAL IN
bore_diameter3.1496 INCHES NOMINAL IN
overall_width1.7502 INCHES NOMINAL IN
standout_width0.3722 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.1200 INCHES NOMINAL IN
backface_corner_radius0.1200 INCHES NOMINAL IN
overall_outside_diameter5.9033 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-869-3671
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 748-743X · 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
•
STANDOUT WIDTH: 0.3722 INCHES NOMINAL IN
•
RETAINER FABRICATION METHOD: PRESSED
•
CUP WIDTH: 1.3780 INCHES NOMINAL IN
•
BORE DIAMETER: 3.1496 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1200 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
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)
STANDOUT WIDTH0.3722 INCHES NOMINAL IN
RETAINER FABRICATION METHODPRESSED
CUP WIDTH1.3780 INCHES NOMINAL IN
BORE DIAMETER3.1496 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1200 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
CONE WIDTH1.8375 INCHES NOMINAL IN
CONE CORNER RADIUS0.1200 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
250049Interchangeable
interchangeable cross-reference
interchangeable
0211594-7Interchangeable
interchangeable cross-reference
interchangeable
026-4722Interchangeable
interchangeable cross-reference
interchangeable
51107Interchangeable
interchangeable cross-reference
interchangeable
SC-B-69870Interchangeable
interchangeable cross-reference
interchangeable
10304Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 748-743X?
748-743X is a BEARING,ROLLER,TAPERED.
What parts can replace 748-743X?
There are 12 known substitutes for 748-743X: 250049, 0211594-7, 026-4722 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 748-743X?
748-743X is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-869-3671. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026