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Technical Data Sheet
PartsTable / COMPONENT / FF-B-187A
FF-B-187A ✓ 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 taper: 1.000 PER FOOT IN INCHES NOMINAL, material: STEEL OVERALL, cup_width: 1.7500 INCHES NOMINAL IN, cone_width: 38.00 MILLIMETERS NOMINAL MM, flange_width: 0.0938 INCHES NOMINAL IN, bore_diameter: 170.00 MILLIMETERS NOMINAL MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0203, 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-187A
NSN: 3110-00-100-0203
FSC: 3110
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
taper1.000 PER FOOT IN INCHES NOMINAL
materialSTEEL OVERALL
cup_width1.7500 INCHES NOMINAL IN
cone_width38.00 MILLIMETERS NOMINAL MM
flange_width0.0938 INCHES NOMINAL IN
bore_diameter170.00 MILLIMETERS NOMINAL MM
overall_width2.1250 INCHES NOMINAL IN
alignment_typeRIGID
standout_width0.3750 INCHES NOMINAL IN
outside_diameter3.0000 INCHES NOMINAL IN
special_featuresDUTY CLASS HM SERIES
style_designatorNORMAL ANGLE
NSN3110-00-100-0203
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: FF-B-187A · 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
•
CONE CORNER RADIUS: 0.0312 INCHES NOMINAL IN
•
BORE DIAMETER: 1.6250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE WIDTH: 0.8820 INCHES NOMINAL IN
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)
CONE CORNER RADIUS0.0312 INCHES NOMINAL IN
BORE DIAMETER1.6250 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CONE WIDTH0.8820 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
7264785Interchangeable
interchangeable cross-reference
interchangeable
A67159Interchangeable
interchangeable cross-reference
interchangeable
59687Interchangeable
interchangeable cross-reference
interchangeable
CS4310-0033Interchangeable
interchangeable cross-reference
interchangeable
ASC1529717Interchangeable
interchangeable cross-reference
interchangeable
156 ITEM 36Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-B-187A?
FF-B-187A is a BEARING,ROLLER,TAPERED.
What parts can replace FF-B-187A?
There are 26 known substitutes for FF-B-187A: 7264785, A67159, 59687 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-B-187A?
FF-B-187A is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0203. 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