PartsTable
Technical Data Sheet
PartsTable / COMPONENT / FF-B-187/01-391
FF-B-187/01-391 ✓ 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 FF-B-187/01-391 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-4192, 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
FF-B-187/01-391
NSN: 3110-00-100-4192
FSC: 3110
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
Part NumberFF-B-187/01-391
NSN3110-00-100-4192
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: FF-B-187/01-391 · 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: 2.1250 INCHES NOMINAL IN
•
CUP WIDTH: 1.1250 INCHES NOMINAL IN
•
OVERALL OUTSIDE DIAMETER: 4.2500 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.3125 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
CONE WIDTH: 1.4550 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER2.1250 INCHES NOMINAL IN
CUP WIDTH1.1250 INCHES NOMINAL IN
OVERALL WIDTH1.4375 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER4.2500 INCHES NOMINAL IN
STANDOUT WIDTH0.3125 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
CONE WIDTH1.4550 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
NONDEFINITIVE SPEC/STD DATA751 TYPE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
F6008443Interchangeable
interchangeable cross-reference
interchangeable
F600B443Interchangeable
interchangeable cross-reference
interchangeable
856112Interchangeable
interchangeable cross-reference
interchangeable
539-532XInterchangeable
interchangeable cross-reference
interchangeable
SNC54S260J-00Interchangeable
interchangeable cross-reference
interchangeable
171-26Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-B-187/01-391?
FF-B-187/01-391 is a FF-B-187/01-391.
What parts can replace FF-B-187/01-391?
There are 20 known substitutes for FF-B-187/01-391: F6008443, F600B443, 856112 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-B-187/01-391?
FF-B-187/01-391 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-4192. 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