PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 646-4C
646-4C ✓ 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,CYLINDRICAL is a the manufacturer industrial component. Key specifications include power_rating: 0.2500 HORSEPOWER OUTPUT, specific_use: PUMP ROTARY POWER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-344-2040, 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
646-4C
NSN: 3110-01-344-2040
FSC: 3110
CAGE: 12128 — COLUMBUS MCKINNON CORP CM HOIST DIV (USA)
SPECIFICATIONS
power_rating0.2500 HORSEPOWER OUTPUT
specific_usePUMP ROTARY POWER
NSN3110-01-344-2040
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 646-4C · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
88444Interchangeable
interchangeable cross-reference
interchangeable
88514Interchangeable
interchangeable cross-reference
interchangeable
B2788-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 646-4C?
646-4C is a BEARING,ROLLER,CYLINDRICAL.
What parts can replace 646-4C?
There are 3 known substitutes for 646-4C: 88444, 88514, B2788-3. Substitute compatibility should be verified for your specific system.
What is the NSN for 646-4C?
646-4C is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-01-344-2040. 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