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Technical Data Sheet
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R-3178 — R-3178

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

R-3178: R-3178.

The R-3178 is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 3120-00-270-0109, 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
MRO→ MRO_GENERAL→ R-3178
NSN: 3120-00-270-0109
NIINs: 002700109, 010962238
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 14541 — COOPER MACHINERY SERVICES LLC (USA)
SPECIFICATIONS
Part NumberR-3178
NSN3120-00-270-0109
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: R-3178 · 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
SUBSTITUTES & CROSS-REFERENCES 3
L-R-3178Reference document
Same NSN cross-reference
Reference document — Secondary reference
R1031Reference document
Same NSN cross-reference
Reference document — Secondary reference
96707Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 R-3178?
R-3178 is a R-3178. It is classified as a MRO (MRO_GENERAL).
What parts can replace R-3178?
There are 3 known substitutes for R-3178: L-R-3178, R1031, 96707. Substitute compatibility should be verified for your specific system.
What is the NSN for R-3178?
R-3178 is cataloged in the U.S. Government catalog under NSN 3120-00-270-0109. This indicates validated use in U.S. government and defense supply chains.
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