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B541DD-E-8640 — BEARING,BALL,AIRFRAME

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

B541DD-E-8640: BEARING,BALL,AIRFRAME.

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include bore_diameter: 1.0618 INCHES MINIMUM AND 1.0618 INCHES MINIMUM AND 1.0632 INCHES MAXIMUM1.0632 INCHES MAXIMUM IN, load_direction: RADIALRADIAL, shield_quantity: 22, inner_ring_width: 0.2760 INCHES MINIMUM AND 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM0.2810 INCHES MAXIMUM IN, outer_ring_width: 0.2450 INCHES MINIMUM AND 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM0.2500 INCHES MAXIMUM IN, special_features: INNER RACE RADIUS 50.5,OUTER RACE RADIUS 51.5INNER RACE RADIUS 50.5,OUTER RACE RADIUS 51.5. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-359-3078, 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
B541DD-E-8640
NSN: 3110-01-359-3078
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 06144 — INDUSTRIAL TECTONICS BEARINGS CORPORATION DBA RBC BEARINGS INC DIV INDUSTRIAL TECTONICS BEARINGS (USA)
SPECIFICATIONS
bore_diameter1.0618 INCHES MINIMUM AND 1.0618 INCHES MINIMUM AND 1.0632 INCHES MAXIMUM1.0632 INCHES MAXIMUM IN
load_directionRADIALRADIAL
shield_quantity22
inner_ring_width0.2760 INCHES MINIMUM AND 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM0.2810 INCHES MAXIMUM IN
outer_ring_width0.2450 INCHES MINIMUM AND 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM0.2500 INCHES MAXIMUM IN
special_featuresINNER RACE RADIUS 50.5,OUTER RACE RADIUS 51.5INNER RACE RADIUS 50.5,OUTER RACE RADIUS 51.5
style_designatorSINGLE ROW INNER RING EXTENDED BOTH SIDESSINGLE ROW INNER RING EXTENDED BOTH SIDES
overall_outside_diameter1.4990 INCHES MINIMUM AND 1.4990 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM1.5000 INCHES MAXIMUM IN
NSN3110-01-359-3078
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B541DD-E-8640 · 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
•
OUTER RING WIDTH: 0.2450 INCHES MINIMUM AND 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM0.2500 INCHES MAXIMUM IN
•
SHIELD QUANTITY: 22
•
STYLE DESIGNATOR: SINGLE ROW INNER RING EXTENDED BOTH SIDESSINGLE ROW INNER RING EXTENDED BOTH SIDES
•
OVERALL OUTSIDE DIAMETER: 1.4990 INCHES MINIMUM AND 1.4990 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM1.5000 INCHES MAXIMUM IN
•
LOAD DIRECTION: RADIALRADIAL
•
BORE DIAMETER: 1.0618 INCHES MINIMUM AND 1.0618 INCHES MINIMUM AND 1.0632 INCHES MAXIMUM1.0632 INCHES MAXIMUM IN
•
INNER RING WIDTH: 0.2760 INCHES MINIMUM AND 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM0.2810 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OUTER RING WIDTH0.2450 INCHES MINIMUM AND 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM0.2500 INCHES MAXIMUM IN
SHIELD QUANTITY22
STYLE DESIGNATORSINGLE ROW INNER RING EXTENDED BOTH SIDESSINGLE ROW INNER RING EXTENDED BOTH SIDES
OVERALL OUTSIDE DIAMETER1.4990 INCHES MINIMUM AND 1.4990 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM1.5000 INCHES MAXIMUM IN
LOAD DIRECTIONRADIALRADIAL
SPECIAL FEATURESINNER RACE RADIUS 50.5,OUTER RACE RADIUS 51.5INNER RACE RADIUS 50.5,OUTER RACE RADIUS 51.5
BORE DIAMETER1.0618 INCHES MINIMUM AND 1.0618 INCHES MINIMUM AND 1.0632 INCHES MAXIMUM1.0632 INCHES MAXIMUM IN
INNER RING WIDTH0.2760 INCHES MINIMUM AND 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM0.2810 INCHES MAXIMUM IN
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 1
2L7012-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 B541DD-E-8640?
B541DD-E-8640 is a BEARING,BALL,AIRFRAME.
What parts can replace B541DD-E-8640?
There is 1 known substitute for B541DD-E-8640: 2L7012-5. Substitute compatibility should be verified for your specific system.
What is the NSN for B541DD-E-8640?
B541DD-E-8640 is cataloged in the U.S. Government catalog under NSN 3110-01-359-3078. 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.