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FF-B-187 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

FF-B-187: 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: 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 part is cataloged in the U.S.

Government catalog 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
NIINs: 000047172, 000068266, 000137758, 000175129, 000278927, 000409768, 000456129, 000539364, 000564386, 000680260, 000689395, 000701912, 000718855, 000758370, 000886136, 001000202, 001000211, 001000223, 001000226, 001000228, 001000236, 001000238, 001000239, 001000246, 001000260, 001000261, 001000274, 001000281, 001000315, 001000321, 001000342, 001000346, 001000356, 001000357, 001000371, 001000373, 001000377, 001000379, 001000496, 001000497, 001000501, 001000502, 001000509, 001000571, 001000574, 001000576, 001000582, 001000589, 001000591, 001000603, 001000628, 001000634, 001000664, 001000674, 001000675, 001000688, 001000739, 001000741, 001000744, 001000745, 001000747, 001000764, 001000790, 001000798, 001003086, 001003111, 001003120, 001003135, 001003139, 001003148, 001003156, 001003163, 001003167, 001003525, 001003539, 001003546, 001003552, 001003554, 001003556, 001003593, 001003594, 001003596, 001003598, 001003608, 001003644, 001003649, 001003655, 001003663, 001003664, 001003672, 001003680, 001003689, 001003690, 001003692, 001003694, 001003698, 001003879, 001003897, 001003901, 001003903, 001004156, 001004162, 001004164, 001004175, 001004179, 001004180, 001004181, 001004183, 001004189, 001004190, 001004192, 001004209, 001004210, 001004211, 001004214, 001004228, 001004238, 001004404, 001004405, 001004409, 001004415, 001004418, 001004421, 001004423, 001004429, 001004433, 001004435, 001004444, 001004446, 001004449, 001004454, 001004455, 001004457, 001004460, 001004463, 001004464, 001004465, 001004467, 001004480, 001004485, 001004492, 001005285, 001005302, 001005321, 001005330, 001005332, 001005333, 001005336, 001005340, 001005351, 001005356, 001005359, 001005366, 001005368, 001005370, 001005487, 001005493, 001005494, 001005498, 001005499, 001005508, 001005511, 001005512, 001005523, 001005524, 001005525, 001005530, 001005531, 001005532, 001005536, 001005801, 001005826, 001005924, 001005936, 001005939, 001005942, 001005948, 001005953, 001005963, 001005973, 001005981, 001005983, 001005987, 001005990, 001005997, 001009816, 001009838, 001009865, 001010841, 001011779, 001011789, 001013570, 001014181, 001014191, 001016665, 001017346, 001017378, 001017384, 001017440, 001042786, 001042787, 001076249, 001168806, 001424359, 001424361, 001424364, 001424370, 001424385, 001424394, 001424408, 001437571, 001518621, 001557435, 001557437, 001557440, 001557443, 001557447, 001557450, 001557454, 001557458, 001557501, 001557770, 001588343, 001610535, 001701474, 001875730, 001950455, 001981302, 001981379, 001981478, 001981486, 001982172, 001982828, 001982969, 002150303, 002181882, 002272220, 002272406, 002272480, 002272559, 002272672, 002272699, 002273079, 002273080, 002273398, 002273707, 002273710, 002273793, 002274057, 002274095, 002274669, 002449353, 002458829, 002537881, 002750115, 002750116, 002750287, 002770178, 002770179, 002770368, 002770654, 002770690, 002786803, 002786852, 002877050, 002938154, 002938162, 002938250, 002938657, 002939082, 002990309, 003217247, 004069608, 004134829, 004209595, 004359203, 004392572, 004703471, 004804129, 005165497, 005299206, 005421704, 005540026, 005545650, 005749762, 005809510, 005868305, 005934289, 005956384, 006037718, 006070714, 006783339, 006796781, 006824770, 006824772, 007572392, 007630373, 007651440, 007662306, 007680545, 007680546, 007803670, 007854040, 007932947, 008082993, 008118716, 008176162, 008202726, 008299921, 008385878, 008436752, 008440992, 008462752, 008506871, 008557915, 008575629, 008760772, 008876348, 008908005, 008908006, 008908007, 008976162, 008990509, 009010774, 009043399, 009131530, 009154934, 009223390, 009223392, 009260269, 009489805, 009556630, 009637313, 009677974, 009681821, 009781367, 009839681, 009921067, 009983172, 010174200, 010185704, 010228162, 010229092, 010234874, 010274475, 010461244, 010757216, 010760381, 010760382, 010911295, 010978259, 010979999, 011130636, 011299893, 011365383, 011558703, 011645656, 011788429, 011956626, 011956628, 012116995, 012391367, 012662771, 013119143, 013796607, 013860988
FSC: 3110 — Bearings, Antifriction, Unmounted
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
•
STYLE DESIGNATOR: NORMAL ANGLE
•
OUTSIDE DIAMETER: 1.7810 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0500 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
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
OVERALL WIDTH0.4750 INCHES NOMINAL IN
OUTSIDE DIAMETER1.7810 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0500 INCHES NOMINAL IN
SPECIAL FEATURESDUTY CLASS LM SERIES
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 2
LM12710Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
D0AZ1217AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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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 U.S. Government catalog under NSN 3110-00-004-7172. This indicates validated use in U.S. government and defense supply chains.
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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.