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Technical Data Sheet

FF-B-187/1 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

FF-B-187/1: 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 material: STEEL OVERALL, cup_width: 0.6563 INCHES NOMINAL IN, cone_width: 0.8125 INCHES NOMINAL IN, bore_diameter: 3.5000 INCHES NOMINAL IN, overall_width: 0.8125 INCHES NOMINAL IN, alignment_type: RIGID. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-053-9360, 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
NSN: 3110-00-053-9360
NIINs: 000539360, 001000234, 001000250, 001000262, 001000265, 001000268, 001000284, 001000299, 001000328, 001000334, 001000336, 001000337, 001000338, 001000339, 001000340, 001000343, 001000349, 001000352, 001000366, 001000367, 001000370, 001000372, 001000376, 001000510, 001000514, 001000533, 001000534, 001000540, 001000544, 001000565, 001000569, 001000572, 001000575, 001000577, 001000580, 001000584, 001000594, 001000618, 001000631, 001000633, 001000637, 001000640, 001000642, 001000643, 001000646, 001000647, 001000648, 001000649, 001000650, 001000661, 001000663, 001000668, 001000670, 001000676, 001000683, 001000689, 001000690, 001000692, 001000695, 001000714, 001000719, 001000743, 001000774, 001000777, 001000787, 001000799, 001003075, 001003084, 001003095, 001003104, 001003118, 001003119, 001003133, 001003150, 001003151, 001003152, 001003524, 001003527, 001003528, 001003534, 001003537, 001003545, 001003557, 001003561, 001003567, 001003575, 001003576, 001003577, 001003586, 001003604, 001003615, 001003617, 001003618, 001003621, 001003631, 001003681, 001003683, 001003685, 001003898, 001003899, 001004185, 001004186, 001004200, 001004210, 001004243, 001004404, 001004407, 001004414, 001004443, 001004450, 001004479, 001004483, 001004484, 001005289, 001005293, 001005301, 001005303, 001005322, 001005327, 001005328, 001005329, 001005338, 001005358, 001005482, 001005486, 001005488, 001005929, 001005949, 001005958, 001009551, 001009567, 001010998, 001011796, 001016493, 001424360, 001424387, 001424388, 001424390, 001437538, 001437587, 001518636, 001588355, 001599457, 001637713, 001982280, 001982771, 002273719, 002274668, 002274682, 002750248, 002938998, 006069575, 006189886, 006203251, 006241538, 007651213, 007896637, 008129523, 008140630, 008473734, 008721543, 009050804, 009139354, 009890739, 009980610
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.6563 INCHES NOMINAL IN
cone_width0.8125 INCHES NOMINAL IN
bore_diameter3.5000 INCHES NOMINAL IN
overall_width0.8125 INCHES NOMINAL IN
alignment_typeRIGID
standout_width0.1563 INCHES NOMINAL IN
outside_diameter4.7500 INCHES NOMINAL IN
special_featuresDUTY CL HM SERIES
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0620 INCHES NOMINAL IN
lubrication_materialGREASE
NSN3110-00-053-9360
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: FF-B-187/1 · 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
•
CUP WIDTH: 0.6563 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 2.5312 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0620 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.0620 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.1875 INCHES NOMINAL IN
•
CONE WIDTH: 0.8438 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
CUP WIDTH0.6563 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH0.8438 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER2.5312 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0620 INCHES NOMINAL IN
CONE CORNER RADIUS0.0620 INCHES NOMINAL IN
STANDOUT WIDTH0.1875 INCHES NOMINAL IN
CONE WIDTH0.8438 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER1.1875 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 8
912036-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
63513Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
156194-156195Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
M86649M86610Reference document
Same NSN cross-reference
Reference document — Secondary reference
596954Reference document
Same NSN cross-reference
Reference document — Secondary reference
411626-016Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FF-B-187/1?
FF-B-187/1 is a BEARING,ROLLER,TAPERED.
What parts can replace FF-B-187/1?
There are 8 known substitutes for FF-B-187/1: 912036-1, 63513, 156194-156195 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-B-187/1?
FF-B-187/1 is cataloged in the U.S. Government catalog under NSN 3110-00-053-9360. This indicates validated use in U.S. government and defense supply chains.
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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.