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Technical Data Sheet
PartsTable / COMPONENT / FF-B-187
FF-B-187 ✓ 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: 17.0 MILLIMETERS NOMINAL MM, bore_shape: STRAIGHT, cone_width: 0.7810 INCHES NOMINAL IN, corner_shape: SQUARE ALL CORNERS, flange_width: 0.1563 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 3110-00-004-7172, 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
NSN: 3110-00-004-7172
FSC: 3110
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width17.0 MILLIMETERS NOMINAL MM
bore_shapeSTRAIGHT
cone_width0.7810 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
flange_width0.1563 INCHES NOMINAL IN
bore_diameter0.7500 INCHES NOMINAL IN
hole_diameter1.396 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN
overall_width0.5313 INCHES NOMINAL IN
alignment_typeRIGID
load_directionRADIAL
overall_length1.2500 INCHES NOMINAL IN
NSN3110-00-004-7172
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: FF-B-187 · 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
•
MATERIAL: STEEL OVERALL
•
BACKFACE CORNER RADIUS: 0.0500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
OUTSIDE DIAMETER: 1.7810 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
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)
MATERIALSTEEL OVERALL
BACKFACE CORNER RADIUS0.0500 INCHES NOMINAL IN
OVERALL WIDTH0.4750 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
SPECIAL FEATURESDUTY CLASS LM SERIES
OUTSIDE DIAMETER1.7810 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
LM12710Interchangeable
Same NIIN cross-reference
interchangeable
D0AZ1217AInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-B-187?
FF-B-187 is a BEARING,ROLLER,TAPERED.
What parts can replace FF-B-187?
There are 2 known substitutes for FF-B-187: LM12710, D0AZ1217A. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-B-187?
FF-B-187 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-004-7172. 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