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E255 — REACTOR

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

E255: REACTOR.

The REACTOR is a the manufacturer industrial component. Key specifications include phase: THREE INPUT, duty_cycle: CONTINUOUS, body_length: 0.500 INCHES MAXIMUM IN, power_rating: 5.000 HORSEPOWER OUTPUT, rating_method: ELECTRICAL SINGLE COMPONENT SINGLE WINDING, cooling_method: FAN COOLED. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-810-7609, 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
E255
NSN: 3120-00-810-7609
NIINs: 008107609, 010121357, 013716953
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 71366 — BUNTING BEARINGS CORP (USA)
SPECIFICATIONS
phaseTHREE INPUT
duty_cycleCONTINUOUS
body_length0.500 INCHES MAXIMUM IN
power_rating5.000 HORSEPOWER OUTPUT
rating_methodELECTRICAL SINGLE COMPONENT SINGLE WINDING
cooling_methodFAN COOLED
inclosure_typeFULLY INCLOSED
inductance_typeFIXED
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
special_featuresMEETS OR EXCEEDS NEMA MG1 LATEST REVISION FOR ENERGY EFFICIENT GENERAL PURPOSE DUTY
winding_quantity1 SINGLE COMPONENT
NSN3120-00-810-7609
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: E255 · 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 7
PX716Reference document
Same NSN cross-reference
Reference document — Secondary reference
178GPReference document
Same NSN cross-reference
Reference document — Secondary reference
1144Reference document
Same NSN cross-reference
Reference document — Secondary reference
SH190Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS35771-91Reference document
Same NSN cross-reference
Reference document — Secondary reference
H103Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is E255?
E255 is a REACTOR.
What parts can replace E255?
There are 7 known substitutes for E255: PX716, 178GP, 1144 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E255?
E255 is cataloged in the U.S. Government catalog under NSN 3120-00-810-7609. 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.