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7120181 — HOUSING,BEARING UNIT

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

7120181: HOUSING,BEARING UNIT.

The HOUSING,BEARING UNIT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1018 OVERALL, base_length: 1.250 INCHES NOMINAL IN, bore_diameter: 0.3906 INCHES NOMINAL IN, housing_width: 3.500 INCHES NOMINAL IN, housing_height: 1.500 INCHES NOMINAL IN, housing_length: 1.640 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3130-01-306-8252, 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
7120181
NSN: 3130-01-306-8252
FSC: 3130 — Bearings, Mounted
CAGE: 19204 — ARMY, UNITED STATES DEPARTMENT OF THE DBA ROCK ISLAND ARSENAL JMTC (USA)
SPECIFICATIONS
materialSTEEL COMP 1018 OVERALL
base_length1.250 INCHES NOMINAL IN
bore_diameter0.3906 INCHES NOMINAL IN
housing_width3.500 INCHES NOMINAL IN
housing_height1.500 INCHES NOMINAL IN
housing_length1.640 INCHES NOMINAL IN
shaft_end_typeOPEN
style_designatorPILLOW BLOCK, OPEN, ADJUSTABLE DIAMETER
surface_treatmentCARBON OVERALL
mounting_hole_typeROUND, UNTHREADED
housing_opening_width1.640 INCHES NOMINAL IN
mounting_hole_diameter0.3906 INCHES NOMINAL IN
NSN3130-01-306-8252
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 7120181 · 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
•
HOUSING HEIGHT: 1.500 INCHES NOMINAL IN
•
MOUNTING HOLE TYPE: ROUND, UNTHREADED
•
HOUSING OPENING WIDTH: 1.640 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PILLOW BLOCK, OPEN, ADJUSTABLE DIAMETER
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MOUNTING HOLE DIAMETER: 0.3906 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH: 2.750 INCHES NOMINAL IN
•
HOUSING WIDTH: 3.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HOUSING HEIGHT1.500 INCHES NOMINAL IN
MOUNTING HOLE TYPEROUND, UNTHREADED
HOUSING OPENING WIDTH1.640 INCHES NOMINAL IN
STYLE DESIGNATORPILLOW BLOCK, OPEN, ADJUSTABLE DIAMETER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MOUNTING HOLE DIAMETER0.3906 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH2.750 INCHES NOMINAL IN
HOUSING WIDTH3.500 INCHES NOMINAL IN
BASE LENGTH1.250 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH2.000 INCHES NOMINAL IN
OTHER ITEMS IN FSC 3130 — Bearings, Mounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3130-00-001-5118 3130-00-001-5137 3130-00-001-6585 3130-00-003-0422 3130-00-003-0455 3130-00-003-0794 3130-00-003-2802 3130-00-003-9535
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7120181?
7120181 is a HOUSING,BEARING UNIT.
What is the NSN for 7120181?
7120181 is cataloged in the U.S. Government catalog under NSN 3130-01-306-8252. 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.