NSN 6680-00-881-3917 B457, 00-881-3917, 008813917
Product Details | TACHOMETER GENERATOR
6680-00-881-3917 A generator consisting of a series of mounted coils surrounding a rotating permanent magnet or a permanent magnet and a rotating armature. The voltage output is directly proportional to the speed of rotation of the shaft. When used with an associated indicator, transmits such data as revolutions per minute, speed of travel, and the like. May also be used in servomechanism loops as a system stabilizer. Excludes rotary inverters, rotary converters, motor generators, dynamotors, generator sets, synchros, frequency or phase changers, and engine accessory generators.
Part Alternates: B457, 6680-00-881-3917, 00-881-3917, 6680008813917, 008813917
Instruments and Laboratory Equipment | Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | 01 JAN 1962 | 00-881-3917 | 20241 ( GENERATOR, TACHOMETER ) |
Cross Reference | NSN 6680-00-881-3917
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| B457 | 39739 | SCOTT FETZER COMPANY, THE DBA MERIAM PROCESS TECHNOLOGIES |
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Technical Data | NSN 6680-00-881-3917
| Characteristic | Specifications |
|---|---|
| OVERALL LENGTH | 5.125 INCHES |
| OVERALL WIDTH | 2.438 INCHES |
| OVERALL HEIGHT | 2.438 INCHES |
| LENGTH OF SHAFT FROM HOUSING | 0.562 INCHES SINGLE END |
| MOUNTING METHOD | FIXED BASE AND FACE |
| MOUNTING FACILITY TYPE AND QUANTITY | 4 THREADED HOLE |
| NOMINAL CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH | 1.875 INCHES |
| NOMINAL CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH | 1.875 INCHES |
| CURRENT TYPE | AC OUTPUT |
| CURRENT RATING IN AMPS | 0.003 SINGLE OUTPUT |
| TERMINAL TYPE AND QUANTITY | 1 RECEPTACLE |
| CALIBRATION VOLTAGE OUTPUT TYPE IN VOLTS | 21.0 AC |
| CALIBRATION SPEED IN RPM | 4200.0 |
| ELECTRICAL RESISTANCE | 40.0 OHMS |
| ROTOR SPEED RATING IN RPM | 100.0 LOW FULL LOAD AND 4200.0 HIGH FULL LOAD |
| SHAFT END CHARACTERISTIC | A15 SINGLE STYLE SINGLE END |
| WIDTH ACROSS FLATS | 0.2440 INCHES NOMINAL SINGLE END |
| SPECIAL FEATURES | ABSOLUTE ACCURACY! 2 ROTOR POLES |
| MANUFACTURERS CODE | 39739 |
| DESIGN CONTROL REFERENCE | B457 |
Restrictions/Controls & Freight Information | NSN 6680-00-881-3917
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| NMF Description | 062120 | GENERATORS/MOTORS/PARTS NOI |
| Less than car load rating | Q | 70 |
| Less than truck load rating | W | Rating Variable |
| Water commodity Code | 590 | unknown |
| Originating Activity Code | XX | |
| Air Dimension Code | A | Shipment is not a consolidation and does not exceed 72 inches in any dimension. |
| Air Commodity | H | Signal Corps supplies and equipment, including radio equipment and supplies, communications equipment and supplies, electrical equipment and supplies, etc. |
| Air Special Handling | Z | No special handling required. |
| Special Handling Code | 9 | unknonwn |
| HAZMAT | ||
| Type of Cargo | Z | No special type of cargo code applicable |