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Technical Data Sheet
PartsTable / COMPONENT / MB540
MB540 ✓ Verified by PartsTable
— · 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,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 0.8745 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN, load_direction: RADIAL, inner_ring_width: 0.2785 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN, outer_ring_width: 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN, special_features: 0.0001 IN. MIN 0.0005 IN.

MAX INTERNAL CLEARANCE IN. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-690-7298, 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
MB540
NSN: 3110-00-690-7298
FSC: 3110
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.8745 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
load_directionRADIAL
inner_ring_width0.2785 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
outer_ring_width0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
special_features0.0001 IN. MIN 0.0005 IN. MAX INTERNAL CLEARANCE IN
style_designatorSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
overall_outside_diameter1.3120 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
NSN3110-00-690-7298
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MB540 · 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
•
OVERALL OUTSIDE DIAMETER: 1.3120 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
•
OUTER RING WIDTH: 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
•
BORE DIAMETER: 0.8745 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
•
INNER RING WIDTH: 0.2785 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
LOAD DIRECTION: RADIAL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL OUTSIDE DIAMETER1.3120 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
OUTER RING WIDTH0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
STYLE DESIGNATORSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
SPECIAL FEATURES0.0001 IN. MIN 0.0005 IN. MAX INTERNAL CLEARANCE IN
BORE DIAMETER0.8745 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
INNER RING WIDTH0.2785 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
LOAD DIRECTIONRADIAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
180165Interchangeable
interchangeable cross-reference
interchangeable
181826-2Interchangeable
interchangeable cross-reference
interchangeable
47-150-243-1Interchangeable
interchangeable cross-reference
interchangeable
B540E7402Interchangeable
interchangeable cross-reference
interchangeable
B540Interchangeable
interchangeable cross-reference
interchangeable
M 9569Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MB540?
MB540 is a BEARING,BALL,AIRFRAME.
What parts can replace MB540?
There are 12 known substitutes for MB540: 180165, 181826-2, 47-150-243-1 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MB540?
MB540 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-690-7298. 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: July 2026