PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 28623
28623 ✓ 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

TRANSMISSION,MECHANICAL,AIRCRAFT. Key specifications include material: STEEL, end_similarity: NOT IDENTICAL, overall_length: 15.875 INCHES NOMINAL IN, first_end_style: WOODRUFF KEYWAY, second_end_style: EXTERNALLY THREADED AND WOODRUFF KEYWAY, first_end_diameter: 1.5000 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 3110-00-143-7559, 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
28623
NSN: 3110-00-143-7559
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL
step_quantity9
end_similarityNOT IDENTICAL
overall_length15.875 INCHES NOMINAL IN
first_end_styleWOODRUFF KEYWAY
second_end_styleEXTERNALLY THREADED AND WOODRUFF KEYWAY
first_end_diameter1.5000 INCHES NOMINAL IN
second_end_diameter1.2500 INCHES NOMINAL IN
largest_step_diameter2.750 INCHES NOMINAL IN
first_end_keyway_width0.3750 INCHES NOMINAL IN
second_end_keyway_width0.3750 INCHES NOMINAL IN
second_end_external_thread_length1.000 INCHES NOMINAL IN
NSN3110-00-143-7559
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 28623 · 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
•
BACKFACE CORNER RADIUS: 0.0312 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STYLE DESIGNATOR: NORMAL ANGLE
•
OUTSIDE DIAMETER: 3.8750 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
BACKFACE CORNER RADIUS0.0312 INCHES NOMINAL IN
OVERALL WIDTH0.7656 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
STYLE DESIGNATORNORMAL ANGLE
OUTSIDE DIAMETER3.8750 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
28623Interchangeable
interchangeable cross-reference
interchangeable
5537Interchangeable
interchangeable cross-reference
interchangeable
3980Interchangeable
interchangeable cross-reference
interchangeable
889Interchangeable
interchangeable cross-reference
interchangeable
790AInterchangeable
interchangeable cross-reference
interchangeable
28623-01Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28623?
28623 is a TRANSMISSION,MECHANICAL,AIRCRAFT.
What parts can replace 28623?
There are 6 known substitutes for 28623: 28623, 5537, 3980 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28623?
28623 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-143-7559. 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