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RD18121A — MOTOR,ALTERNATING CURRENT

✓ Government record, cited
HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC · MOTOR
PRODUCT OVERVIEW

RD18121A: MOTOR,ALTERNATING CURRENT.

The MOTOR,ALTERNATING CURRENT is a HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC industrial component. Key specifications include PHASE: THREE INPUT, TEMP RATING: -65.0 OPERATING FAHRENHEIT AND 160.0 OPERATING FAHRENHEIT, POWER RATING: 0.200 HORSEPOWER OUTPUT, WINDING TYPE: INDUCTION-SQUIRREL CAGE, OVERALL WIDTH: 3.375 INCHES IN, COOLING METHOD: NONVENTILATED.

This part is cataloged in the U.S. Government catalog under NSN 6105-00-050-9358, 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
RD18121A
NSN: 6105-00-050-9358
FSC: 6105 — Motors, Electrical
CAGE: 51663 — HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC (USA)
SPECIFICATIONS
PHASETHREE INPUT
TEMP RATING-65.0 OPERATING FAHRENHEIT AND 160.0 OPERATING FAHRENHEIT
POWER RATING0.200 HORSEPOWER OUTPUT
WINDING TYPEINDUCTION-SQUIRREL CAGE
OVERALL WIDTH3.375 INCHES IN
COOLING METHODNONVENTILATED
OVERALL HEIGHT3.140 INCHES IN
OVERALL LENGTH5.956 INCHES IN
SHAFT DIAMETER0.236 INCHES NOMINAL SINGLE END IN
MOUNTING METHODFIXED BASE
UNDERCUT LENGTH0.027 INCHES NOMINAL SINGLE END IN
ENCLOSURE FEATURETOTALLY ENCLOSED
NSN6105-00-050-9358
COMPONENT DIAGRAM
ELECTRIC MOTOR — FRAME SIZE = MOUNTING PATTERN SHAFT J-BOX MOUNTING FEET — FRAME — — · — RPM — · — PN: RD18121A · HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC ⚠ VERIFY BEFORE ORDERING NEMA frame size determines mounting bolt pattern — not interchangeable. 56C ≠ 143T bolt pattern. C-face vs foot-mount vs flange — different mounting, same HP doesn't mean drop-in ✓ BROKER TIP TEFC = outdoor/washdown OK. ODP = dry indoor only. TENV = no external fan, explosion-proof areas. 1750 RPM = 4-pole (most common), 3450 RPM = 2-pole, 1150 RPM = 6-pole PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MOUNTING FACILITY TYPE AND QUANTITY: 4 UNTHREADED HOLE(S)
•
DUTY CYCLE: CONTINUOUS
•
UNDERCUT LENGTH: 0.027 INCHES NOMINAL SINGLE END IN
•
PHASE: THREE INPUT
•
SHAFT DIAMETER: 0.236 INCHES NOMINAL SINGLE END IN
•
FREQUENCY IN HERTZ: 400.0 INPUT
•
UNDERCUT DIAMETER: 0.223 INCHES NOMINAL SINGLE END IN
•
SHAFT CENTER TO MOUNTING SURFACE DISTANCE: 1.593 INCHES SINGLE END IN
TECHNICAL CHARACTERISTICS
MOUNTING FACILITY TYPE AND QUANTITY4 UNTHREADED HOLE(S)
DUTY CYCLECONTINUOUS
UNDERCUT LENGTH0.027 INCHES NOMINAL SINGLE END IN
PHASETHREE INPUT
SHAFT DIAMETER0.236 INCHES NOMINAL SINGLE END IN
FREQUENCY IN HERTZ400.0 INPUT
UNDERCUT DIAMETER0.223 INCHES NOMINAL SINGLE END IN
SHAFT CENTER TO MOUNTING SURFACE DISTANCE1.593 INCHES SINGLE END IN
OVERALL LENGTH5.956 INCHES IN
WINDING TYPEINDUCTION-SQUIRREL CAGE
SUBSTITUTES & CROSS-REFERENCES 1
IS14989Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RD18121A?
RD18121A is a MOTOR,ALTERNATING CURRENT manufactured by HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC.
What parts can replace RD18121A?
There is 1 known substitute for RD18121A: IS14989. Substitute compatibility should be verified for your specific system.
What is the NSN for RD18121A?
RD18121A is cataloged in the U.S. Government catalog under NSN 6105-00-050-9358. 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.