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21-227-3 — BEARING HALF,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

21-227-3: BEARING HALF,SLEEVE.

The BEARING HALF,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, corner_shape: SQUARE ALL CORNERS, hole_diameter: 0.2500 INCHES NOMINAL FIRST IN, overall_length: 1.7500 INCHES NOMINAL IN, style_designator: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES, locking_lug_width: 0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-024-2514, 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
21-227-3
NSN: 3120-00-024-2514
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 35301 — DRESSER INDUSTRIES INC LEROI DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
corner_shapeSQUARE ALL CORNERS
hole_diameter0.2500 INCHES NOMINAL FIRST IN
overall_length1.7500 INCHES NOMINAL IN
style_designatorHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
locking_lug_width0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN
surface_treatmentTIN OVERALL
locking_lug_height0.0450 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN
locking_lug_length0.1875 INCHES MINIMUM AND 0.2188 INCHES MAXIMUM IN
body_inside_diameter2.4800 INCHES MINIMUM AND 2.4805 INCHES MAXIMUM IN
body_outside_diameter0.6250 INCHES NOMINAL IN
lubricant_accommodation_styleGROOVED CIRCULAR
NSN3120-00-024-2514
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 21-227-3 · 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
•
DISTANCE FROM CENTERLINE OF OPENING TO LEFT END OF BEARING: 0.8750 INCHES NOMINAL FIRST IN
•
LOCKING LUG HEIGHT: 0.0450 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN
•
DISTANCE FROM LUG END TO INSIDE OF FLANGE: 0.2530 INCHES MINIMUM AND 0.2580 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.6250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 2.4800 INCHES MINIMUM AND 2.4805 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
DISTANCE FROM CENTERLINE OF OPENING TO LEFT END OF BEARING0.8750 INCHES NOMINAL FIRST IN
LOCKING LUG HEIGHT0.0450 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN
DISTANCE FROM LUG END TO INSIDE OF FLANGE0.2530 INCHES MINIMUM AND 0.2580 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.6250 INCHES NOMINAL IN
STYLE DESIGNATORHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH1.7500 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.4800 INCHES MINIMUM AND 2.4805 INCHES MAXIMUM IN
LUBRICANT ACCOMMODATION STYLEGROOVED CIRCULAR
LOCKING LUG WIDTH0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 3120 — Bearings, Plain, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3120-00-001-1288 3120-00-001-1835 3120-00-001-1838 3120-00-001-1928 3120-00-001-1934 3120-00-001-3933 3120-00-001-3937 3120-00-001-3938
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21-227-3?
21-227-3 is a BEARING HALF,SLEEVE.
What is the NSN for 21-227-3?
21-227-3 is cataloged in the U.S. Government catalog under NSN 3120-00-024-2514. 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.