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FF-B-187A — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

FF-B-187A: BEARING,ROLLER,TAPERED.

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 part is cataloged in the U.S.

Government catalog 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
NIINs: 001000203, 001000204, 001000205, 001000218, 001000225, 001000235, 001000240, 001000245, 001000252, 001000255, 001000256, 001000257, 001000258, 001000266, 001000270, 001000272, 001000273, 001000280, 001000292, 001000311, 001000351, 001000382, 001000384, 001000518, 001000531, 001000536, 001000558, 001000563, 001000587, 001000588, 001000606, 001000625, 001000653, 001000656, 001000660, 001000669, 001000699, 001000704, 001000705, 001000709, 001000711, 001000733, 001000737, 001000748, 001000767, 001000768, 001000801, 001000805, 001003092, 001003093, 001003109, 001003112, 001003128, 001003140, 001003141, 001003159, 001003560, 001003579, 001003588, 001003605, 001003606, 001003635, 001003646, 001003669, 001003688, 001003854, 001003859, 001003860, 001003868, 001004152, 001004154, 001004165, 001004211, 001004235, 001004236, 001004237, 001004244, 001004398, 001004406, 001004427, 001004428, 001004429, 001005283, 001005287, 001005491, 001005494, 001005534, 001005787, 001010983, 001013137, 001013515, 001013614, 001014165, 001017360, 001837550, 001981486, 003217247, 008449770, 009637300, 011124428, 011788429
FSC: 3110 — Bearings, Antifriction, Unmounted
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
•
STYLE DESIGNATOR: NORMAL ANGLE
•
CONE CORNER RADIUS: 0.0312 INCHES NOMINAL IN
•
CONE WIDTH: 0.8820 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 1.6250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
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
STYLE DESIGNATORNORMAL ANGLE
CONE CORNER RADIUS0.0312 INCHES NOMINAL IN
CONE WIDTH0.8820 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER1.6250 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 10
K336Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
211093Reference document
Same NSN cross-reference
Reference document — Secondary reference
100267Reference document
Same NSN cross-reference
Reference document — Secondary reference
2RB62Reference document
Same NSN cross-reference
Reference document — Secondary reference
511443Reference document
Same NSN cross-reference
Reference document — Secondary reference
336Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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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 10 known substitutes for FF-B-187A: K336, 211093, 100267 and 7 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 U.S. Government catalog under NSN 3110-00-100-0203. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.