The Motor-Tachometer Generator, cataloged under National Stock Number 6105-01-034-3859, is classified within Federal Supply Class 6105 (Motors, Electrical) of the Electric Wire, Power, and Distribution Equipment group. The manufacturer of record is General Dynamics Motion Control Llc. Government technical data includes 26 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6105-01-034-3859 |
| Primary Part Number | 18G4R-AA1-A0 |
| Item Name | Motor-Tachometer Generator |
| FSC / FSG | 6105 / 61 — Motors, Electrical |
| Manufacturer | General Dynamics Motion Control Llc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 CLAMP COLLAR |
| Phase | TWO INPUT |
| Shaft Diameter | 0.176 INCHES MINIMUM AND 0.177 INCHES MAXIMUM SINGLE END IN |
| Frequency in Hertz | 400.0 OUTPUT |
| Teeth Quantity | 15 SINGLE END |
| Current Type | AC INPUT |
| Calibration Speed in RPM | 1000.0 |
| Mounting Method | CLAMP RING(S) |
| Cooling Method | NONVENTILATED |
| Full Tooth Length | 0.3960 INCHES NOMINAL SINGLE END IN |
| Features Provided | HORIZONTAL MOUNTING POSITION AND VERTICAL MOUNTING POSITION |
| Maximum Operating Altitude Rating | 50000.0 FEET FT |
| Connection Type and Voltage Rating in Volts | 115.0 LINE TO NEUTRAL SINGLE INPUT |
| Calibration Voltage Output Type in Volts | 0.55 AC |
| Torque Rating and Type | 2.9 INCH-OUNCES STALLED IN |
| Length of Shaft From Housing | 0.396 INCHES SINGLE END IN |
| Current Rating in Amps | 0.285 SINGLE INPUT |
| Control Field Voltage Type and Rating in Volts | 29.0 AC AND 58.0 AC |
| Enclosure Feature | TOTALLY ENCLOSED |
| Power Rating | 18.000 WATTS INPUT |
| Shaft End Characteristic | A17 SINGLE STYLE SINGLE END |
| Excitor Type | SEPARATELY EXCITED |
| Terminal Type and Quantity | 10 SCREW |
| Rotor Speed Rating in RPM | 9500.0 SINGLE NO LOAD |
| Temp Rating | -55.0 OPERATING CELSIUS AND 125.0 OPERATING CELSIUS |
| Inclosure Specification | COMMERCIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 18G4R-AA1-A0 PRIMARY | General Dynamics Motion Control Llc (USA) |
| Reference | Meaning |
|---|---|
| 1711828 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
| 1711828 | 7/2 Vendor item drawing reference L3 Technologies, Inc. Div Communication Systems-East |
NSN 6105-01-034-3859 is a Motor-Tachometer Generator, manufactured by General Dynamics Motion Control Llc, classified under FSC 6105, Motors, Electrical. Status: active.
NSN 6105-01-034-3859 has 1 manufacturer part number on file: 18G4R-AA1-A0 (General Dynamics Motion Control Llc).
Key specifications for 18G4R-AA1-A0: Mounting Facility Type and Quantity: 1 CLAMP COLLAR; Phase: TWO INPUT; Shaft Diameter: 0.176 INCHES MINIMUM AND 0.177 INCHES MAXIMUM SINGLE END IN; Frequency in Hertz: 400.0 OUTPUT. 26 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.