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FF-B-187/1 TYPE FFB187/01-396 — Technical Data Sheet

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— · 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: 1.4375 INCHES NOMINAL IN, cone_width: 1.7230 INCHES NOMINAL IN, bore_diameter: 2.1250 INCHES NOMINAL IN, overall_width: 1.7188 INCHES NOMINAL IN, standout_width: 0.2813 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 3110-00-101-6493, 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-187/1 TYPE FFB187/01-396
NSN: 3110-00-101-6493
FSC: 3110
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.4375 INCHES NOMINAL IN
cone_width1.7230 INCHES NOMINAL IN
bore_diameter2.1250 INCHES NOMINAL IN
overall_width1.7188 INCHES NOMINAL IN
standout_width0.2813 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.1250 INCHES NOMINAL IN
overall_outside_diameter4.8125 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-101-6493
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: FF-B-187/1 TYPE FFB187/01-396 · 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: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.2813 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
•
BORE DIAMETER: 2.1250 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
CONE WIDTH: 1.7230 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
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
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.2813 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
BORE DIAMETER2.1250 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
CONE WIDTH1.7230 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH1.7188 INCHES NOMINAL IN
CUP WIDTH1.4375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
BT363InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
363InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
372AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
94289InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5520InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
BT5520InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-B-187/1 TYPE FFB187/01-396?
FF-B-187/1 TYPE FFB187/01-396 is a BEARING,ROLLER,TAPERED.
What parts can replace FF-B-187/1 TYPE FFB187/01-396?
There are 30 known substitutes for FF-B-187/1 TYPE FFB187/01-396: BT363, 363, 372A and 27 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-B-187/1 TYPE FFB187/01-396?
FF-B-187/1 TYPE FFB187/01-396 is cataloged in the Federal Logistics Information System under NSN 3110-00-101-6493. 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: October 2026