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Technical Data Sheet
PartsTable / COMPONENT / BF51B
BF51B ✓ Verified by PartsTable
— · MOTOR
WHAT YOU NEED TO KNOW
NEMA frame determines mounting bolt pattern TEFC for outdoor, ODP for dry indoor only
C-face vs foot-mount — different mounting
PRODUCT OVERVIEW

The BF51B is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6105-00-707-4903, 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
BF51B
NSN: 6105-00-707-4903
FSC: 6105
CAGE: 20019 — WARD LEONARD CT LLC (USA)
SPECIFICATIONS
Part NumberBF51B
NSN6105-00-707-4903
COMPONENT DIAGRAM
ELECTRIC MOTOR — FRAME SIZE = MOUNTING PATTERN SHAFT J-BOX MOUNTING FEET — FRAME — — · — RPM — · — PN: BF51B · OEM ⚠ 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
•
NOMINAL CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH: 5.750 INCHES IN
•
KEYWAY DEPTH: 0.013 INCHES NOMINAL SECOND END IN
•
SHAFT ROTATION DIRECTION: CLOCKWISE FIRST END
•
FEATURES PROVIDED: VERTICAL MOUNTING POSITION AND INTEGRAL BRAKE AND HORIZONTAL MOUNTING POSITION
•
KEYWAY LENGTH: 2.000 INCHES NOMINAL SECOND END IN
•
FLATTED PORTION LENGTH: 1.000 INCHES NOMINAL FIRST END IN
•
CURRENT RATING METHOD: LOAD
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH5.750 INCHES IN
KEYWAY DEPTH0.013 INCHES NOMINAL SECOND END IN
OVERALL WIDTH11.250 INCHES IN
SHAFT ROTATION DIRECTIONCLOCKWISE FIRST END
FEATURES PROVIDEDVERTICAL MOUNTING POSITION AND INTEGRAL BRAKE AND HORIZONTAL MOUNTING POSITION
KEYWAY LENGTH2.000 INCHES NOMINAL SECOND END IN
FLATTED PORTION LENGTH1.000 INCHES NOMINAL FIRST END IN
CURRENT RATING METHODLOAD
CURRENT RATING IN AMPS6.000 SINGLE INPUT
ENCLOSURE FEATUREOPEN PROTECTED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
SK70-2293Upgraded Successor
successor cross-reference
successor
70-2293Upgraded Successor
successor cross-reference
successor
5867702293Upgraded Successor
successor cross-reference
successor
546627Upgraded Successor
successor cross-reference
successor
506 1.0625Interchangeable
interchangeable cross-reference
interchangeable
37814Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BF51B?
BF51B is a BF51B.
What parts can replace BF51B?
There are 15 known substitutes for BF51B: SK70-2293, 70-2293, 5867702293 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BF51B?
BF51B is cataloged in the Federal Logistics Information System (FLIS) under NSN 6105-00-707-4903. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026