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Technical Data Sheet
PartsTable / COMPONENT / 121550
121550 ✓ 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 SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, cone_width: 1.1420 INCHES NOMINAL IN, bore_diameter: 2.5591 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, cone_corner_radius: 0.0938 INCHES NOMINAL IN, end_item_identification: UH-60 TURBINE ENGINE, ROTARY WING AIRCRAFT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0255, 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
121550
NSN: 3110-00-100-0255
FSC: 3110
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cone_width1.1420 INCHES NOMINAL IN
bore_diameter2.5591 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
cone_corner_radius0.0938 INCHES NOMINAL IN
end_item_identificationUH-60 TURBINE ENGINE, ROTARY WING AIRCRAFT
criticality_code_justificationZZZY
standard_tolerance_designationAFBMA CLASS 2
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
NSN3110-00-100-0255
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 121550 · 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
•
BORE DIAMETER: 2.5591 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.0938 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE WIDTH: 1.1420 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER2.5591 INCHES NOMINAL IN
CONE CORNER RADIUS0.0938 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CONE WIDTH1.1420 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
AS954Interchangeable
interchangeable cross-reference
interchangeable
478Interchangeable
interchangeable cross-reference
interchangeable
B107.1 CL3Interchangeable
interchangeable cross-reference
interchangeable
GT800AW1Interchangeable
interchangeable cross-reference
interchangeable
34Interchangeable
interchangeable cross-reference
interchangeable
578-2.5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121550?
121550 is a SEMICONDUCTOR DEVICE,DIODE.
What parts can replace 121550?
There are 20 known substitutes for 121550: AS954, 478, B107.1 CL3 and 17 more. Substitute compatibility should be verified for your specific system.
Is 121550 still available?
121550 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