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B5121 — FEEDBACK BEARING ASSY

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

B5121: FEEDBACK BEARING ASSY.

The FEEDBACK BEARING ASSY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 5140 OVERALL, overall_length: 1.1250 INCHES NOMINAL IN, style_designator: NEEDLE ROLLER, SPHERICAL ENDS, rolling_element_diameter: 0.1250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-183-9899, 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
B5121
NSN: 3110-00-183-9899
NIINs: 001839899, 015745759
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 13125 — CLEVELAND TRENCHER CO INC (USA)
SPECIFICATIONS
materialSTEEL COMP 5140 OVERALL
overall_length1.1250 INCHES NOMINAL IN
style_designatorNEEDLE ROLLER, SPHERICAL ENDS
rolling_element_diameter0.1250 INCHES NOMINAL IN
NSN3110-00-183-9899
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B5121 · 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
•
ROLLING ELEMENT DIAMETER: 0.1250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NEEDLE ROLLER, SPHERICAL ENDS
•
MATERIAL: STEEL COMP 5140 OVERALL
TECHNICAL CHARACTERISTICS
ROLLING ELEMENT DIAMETER0.1250 INCHES NOMINAL IN
STYLE DESIGNATORNEEDLE ROLLER, SPHERICAL ENDS
OVERALL LENGTH1.1250 INCHES NOMINAL IN
MATERIALSTEEL COMP 5140 OVERALL
SUBSTITUTES & CROSS-REFERENCES 7
382391Reference document
Same NSN cross-reference
Reference document — Secondary reference
19W0679SSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
22-482-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
5294022Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SP121Reference document
Same NSN cross-reference
Reference document — Secondary reference
580203Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B5121?
B5121 is a FEEDBACK BEARING ASSY.
What parts can replace B5121?
There are 7 known substitutes for B5121: 382391, 19W0679S, 22-482-1 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B5121?
B5121 is cataloged in the U.S. Government catalog under NSN 3110-00-183-9899. 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.