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B29121 — BEARING HALF,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

B29121: BEARING HALF,SLEEVE.

The BEARING HALF,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY INNER LAYER, corner_shape: SQUARE ALL CORNERS, overall_length: 0.6875 INCHES NOMINAL IN, style_designator: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES, locking_lug_width: 0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN, surface_treatment: TIN INSIDE DIAMETER SURFACE OF BODY. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-846-4892, 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
B29121
NSN: 3120-00-846-4892
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 5RQL2 — DRS ENVIRONMENTAL SYSTEMS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY INNER LAYER
corner_shapeSQUARE ALL CORNERS
overall_length0.6875 INCHES NOMINAL IN
style_designatorHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
locking_lug_width0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN
surface_treatmentTIN INSIDE DIAMETER SURFACE OF BODY
locking_lug_height0.0310 INCHES MINIMUM AND 0.0410 INCHES MAXIMUM IN
locking_lug_length0.1876 INCHES MINIMUM AND 0.2188 INCHES MAXIMUM IN
body_inside_diameter1.9709 INCHES MINIMUM AND 1.9724 INCHES MAXIMUM IN
body_outside_diameter2.1245 INCHES MINIMUM AND 2.1250 INCHES MAXIMUM IN
material_document_and_classificationUNABLE TO DECODE
distance_from_lug_end_to_end_of_bearing0.0875 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM IN
NSN3120-00-846-4892
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: B29121 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CORNER SHAPE: SQUARE ALL CORNERS
•
LOCKING LUG HEIGHT: 0.0310 INCHES MINIMUM AND 0.0410 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 2.1245 INCHES MINIMUM AND 2.1250 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
•
MATERIAL DOCUMENT AND CLASSIFICATION: UNABLE TO DECODE
•
BODY INSIDE DIAMETER: 1.9709 INCHES MINIMUM AND 1.9724 INCHES MAXIMUM IN
•
LOCKING LUG WIDTH: 0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
LOCKING LUG HEIGHT0.0310 INCHES MINIMUM AND 0.0410 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER2.1245 INCHES MINIMUM AND 2.1250 INCHES MAXIMUM IN
STYLE DESIGNATORHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
OVERALL LENGTH0.6875 INCHES NOMINAL IN
BODY INSIDE DIAMETER1.9709 INCHES MINIMUM AND 1.9724 INCHES MAXIMUM IN
LOCKING LUG WIDTH0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN
SURFACE TREATMENTTIN INSIDE DIAMETER SURFACE OF BODY
DISTANCE FROM LUG END TO END OF BEARING0.0875 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
29121Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B29121?
B29121 is a BEARING HALF,SLEEVE.
What parts can replace B29121?
There is 1 known substitute for B29121: 29121. Substitute compatibility should be verified for your specific system.
What is the NSN for B29121?
B29121 is cataloged in the U.S. Government catalog under NSN 3120-00-846-4892. 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.