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5S6178 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

5S6178: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL OUTER LAYER, corner_shape: SQUARE ALL CORNERS, overall_length: 1.2500 INCHES NOMINAL IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 3.1200 INCHES NOMINAL IN, body_outside_diameter: 3.1915 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-006-0660, 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
5S6178
NSN: 3120-00-006-0660
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OUTER LAYER
corner_shapeSQUARE ALL CORNERS
overall_length1.2500 INCHES NOMINAL IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter3.1200 INCHES NOMINAL IN
body_outside_diameter3.1915 INCHES NOMINAL IN
lubricant_accommodation_styleGROOVED CIRCULAR
surface_groove_location_and_quantity1 EXTERNAL
NSN3120-00-006-0660
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 5S6178 · 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
•
BODY OUTSIDE DIAMETER: 3.1915 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 3.1200 INCHES NOMINAL IN
•
LUBRICANT ACCOMMODATION STYLE: GROOVED CIRCULAR
•
MATERIAL: ALUMINUM ALLOY INNER LAYER
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER3.1915 INCHES NOMINAL IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH1.2500 INCHES NOMINAL IN
BODY INSIDE DIAMETER3.1200 INCHES NOMINAL IN
LUBRICANT ACCOMMODATION STYLEGROOVED CIRCULAR
MATERIALALUMINUM ALLOY INNER LAYER
MATERIALSTEEL OUTER LAYER
SURFACE GROOVE LOCATION AND QUANTITY1 EXTERNAL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5S6178?
5S6178 is a BEARING,SLEEVE.
What is the NSN for 5S6178?
5S6178 is cataloged in the U.S. Government catalog under NSN 3120-00-006-0660. 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.