PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3B7721Motor,direct Current

Westinghouse Electric Corp · NSN 6105-00-504-0034 · FSC 6105 · No Item Name Available
Verified by PartsTable
NSN 6105-00-504-0034 — this item is cataloged by the U.S. Government under National Stock Number 6105-00-504-0034. Primary manufacturer part number: 3B7721.
Features
  • Motor,direct Current — FSC 6105
  • Length of Shaft From Housing: 6.250 INCHES SINGLE END IN
  • Inclosure Specification: MIL-STD-108
  • Cooling Method: AMBIENT AIR
  • Current Rating Method: LOAD
  • Winding Type: COMPOUND WOUND
  • Keyway Width: 0.7500 INCHES NOMINAL IDENTICAL ENDS IN
  • Mounting Method: FIXED BASE
Applications
  • Mechanical power generation
  • Drive system operation
  • Auxiliary equipment operation
General Description

The Motor,direct Current, cataloged under National Stock Number 6105-00-504-0034, is classified within Federal Supply Class 6105 (No Item Name Available) of the Electric Wire, Power, and Distribution Equipment group. The primary manufacturer of record is Westinghouse Electric Corp. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6105-00-504-0034
Primary Part Number3B7721
Item NameMotor,direct Current
FSC / FSG6105 / 61 — No Item Name Available
ManufacturerWestinghouse Electric Corp
StatusACTIVE
Length of Shaft From Housing6.250 INCHES SINGLE END IN
Inclosure SpecificationMIL-STD-108
Cooling MethodAMBIENT AIR
Current Rating MethodLOAD
Winding TypeCOMPOUND WOUND
Keyway Width0.7500 INCHES NOMINAL IDENTICAL ENDS IN
Mounting MethodFIXED BASE
Nominal Center to Center Distance Between Mounting Facilities Parallel to Length27.750 INCHES IN
Shaft End CharacteristicA2 FIRST STYLE AND A29 SECOND STYLE IDENTICAL ENDS
Features ProvidedVERTICAL MOUNTING POSITION
Enclosure FeatureWATERTIGHT
Temp Rating40.0 OPERATING CELSIUS
Thread Length1.3120 INCHES NOMINAL IDENTICAL ENDS IN
Rotor Speed Rating in RPM1900.0 SINGLE FULL LOAD
Time Interval30.0 MINUTES MAXIMUM ON
Connection Type and Voltage Rating in Volts230.0 LINE TO NEUTRAL SINGLE INPUT
Keyway Depth0.7500 INCHES NOMINAL IDENTICAL ENDS IN
Shaft Diameter2.8750 INCHES NOMINAL IDENTICAL ENDS IN
Current Rating in Amps181.000 SINGLE INPUT
Duty CycleINTERMITTENT
Taper Length4.8750 INCHES NOMINAL IDENTICAL ENDS IN
Taper1.500 PER FOOT IN INCHES IDENTICAL ENDS
Power Rating50.0000 HORSEPOWER OUTPUT
Shaft Center to Mounting Surface Distance11.875 INCHES SINGLE END IN
Mounting Facility Type and Quantity4 UNTHREADED HOLE(S)
Nominal Center to Center Distance Between Mounting Facilities Parallel to Width18.500 INCHES IN
Keyway Length4.8750 INCHES NOMINAL IDENTICAL ENDS IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 12
6105-00-475-2645 INTERCHANGEABLE
Motor,direct Current
6105-00-500-1271 INTERCHANGEABLE
Motor,direct Current
6105-00-500-2781 INTERCHANGEABLE
Motor,direct Current
6105-00-635-0575MM8146089 INTERCHANGEABLE
Motor,direct Current
General Electric Company
6105-00-635-0683W707816 INTERCHANGEABLE
Motor,direct Current
General Electric Company
6105-00-635-234534J463 INTERCHANGEABLE
Motor,direct Current
Westinghouse Electric Corp
6105-00-635-2358WW8118750 INTERCHANGEABLE
Motor,direct Current
General Electric Company
6105-00-635-3704G309-377 INTERCHANGEABLE
Motor,direct Current
Kearfott Corporation Div Guidance and Navigation Division
6105-00-635-5365WW5051747 INTERCHANGEABLE
Motor,direct Current
General Electric Company
6105-00-635-53781UH631 INTERCHANGEABLE
Motor,direct Current
Westinghouse Electric Corp
Cross-Reference Index
Part NumberManufacturer
3B7721 PRIMARY Westinghouse Electric Corp (USA)
MILM17413SERVICEA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6105-00-475-2645INTERCHANGEABLE
MOTOR,DIRECT CURRENT
6105-00-500-1271INTERCHANGEABLE
MOTOR,DIRECT CURRENT
6105-00-500-2781INTERCHANGEABLE
MOTOR,DIRECT CURRENT
6105-00-635-0575INTERCHANGEABLE
MOTOR,DIRECT CURRENT
MM8146089
6105-00-635-0683INTERCHANGEABLE
MOTOR,DIRECT CURRENT
W707816
6105-00-635-2345INTERCHANGEABLE
MOTOR,DIRECT CURRENT
34J463
6105-00-635-2358INTERCHANGEABLE
MOTOR,DIRECT CURRENT
WW8118750
6105-00-635-3704INTERCHANGEABLE
MOTOR,DIRECT CURRENT
G309-377
6105-00-635-5365INTERCHANGEABLE
MOTOR,DIRECT CURRENT
WW5051747
6105-00-635-5378INTERCHANGEABLE
MOTOR,DIRECT CURRENT
1UH631
6105-00-635-5860INTERCHANGEABLE
MOTOR,DIRECT CURRENT
T8432024
6105-00-635-5861INTERCHANGEABLE
MOTOR,DIRECT CURRENT
80200

Frequently Asked Questions

What is NSN 6105-00-504-0034?

NSN 6105-00-504-0034 is a Motor,direct Current, manufactured by Westinghouse Electric Corp, classified under FSC 6105 (No Item Name Available). Status: active.

What are the part numbers for NSN 6105-00-504-0034?

NSN 6105-00-504-0034 has 2 cross-referenced part numbers: 3B7721 (Westinghouse Electric Corp), MILM17413SERVICEA (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6105-00-504-0034?

There are 12 known substitutes for 6105-00-504-0034: 6105-00-475-2645, 6105-00-500-1271, 6105-00-500-2781 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3B7721?

Key specifications for 3B7721: Length of Shaft From Housing: 6.250 INCHES SINGLE END IN; Inclosure Specification: MIL-STD-108; Cooling Method: AMBIENT AIR; Current Rating Method: LOAD. 30 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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