R925-21N
View detailed technical data, stock status, and sourcing information for: R925-21N
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Federal Supply Group
Electrical and Electronic Equipment Components
Federal Supply Classification
5990 Synchros and Resolvers
National Stock Number
5990-00-686-4902
Item Name Code
02072
Assigment Date
01/01/1963 (63 years ago)
0.9995 inches minimum and 1.0000 inches maximum shoulder diameter, standard round c body style, 0.6245 inches minimum and 0.6250 inches maximum pilot diameter, 1.0610 inches minimum and 1.0620 inches maximum flange diameter, 2.2020 inches nominal overall length
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Body Style
- standard round c
- Shoulder Diameter
- 0.9995 inches minimum and 1.0000 inches maximum
- Pilot Diameter
- 0.6245 inches minimum and 0.6250 inches maximum
- Overall Length
- 2.2020 inches nominal
- Flange Diameter
- 1.0610 inches minimum and 1.0620 inches maximum
- Flange Thickness
- 0.0930 inches nominal
- Undercut Diameter
- 0.9750 inches nominal
- Undercut Width
- 0.0500 inches nominal
- Shaft Diameter
- 0.1230 inches minimum and 0.1240 inches maximum single shaft
- Shaft Length
- 0.5620 inches nominal single shaft
- Fragility Factor
- moderately rugged
- Body Size
- 11
- Rotor Input Voltage Rating In Volts
- 26.0 nominal
- Frequency In Hertz
- 400.0 nominal
- Rotor Input Current Rating
- 110.0 milliamperes maximum
- Rotor Input Electrical Power Rating
- 430.0 milliwatts maximum
- Zro Resistance In Ohms
- 42.00 nominal
- Zso Resistance In Ohms
- 10.00 nominal
- Zrs Resistance In Ohms
- 50.00 nominal
- Rotor Dc Resistance In Ohms
- 20.00 nominal
- Stator Dc Resistance In Ohms
- 8.50 nominal
- Phase Shift Angle In Deg
- 3.800 input to output nominal
- Electrical Error Angular Range In Minutes
- -30.0 to 30.0
- Spline Tooth Quantity
- 13 single shaft
- Actuator Friction Torque At Minus 55 Deg Celsius
- 3.0 centimeter-grams maximum
- Actuator Friction Torque At Plus 25 Deg Celsius
- 0.3 centimeter-grams maximum
- Torque Gradient Per Angular Deg
- 2100.0 millimeter-milligrams minimum
- Alignment Hole Quantity
- 4
- Pilot Length
- 0.0620 inches nominal
- Shoulder Length
- unable to decode
- Mounting Surface To Terminal End Distance
- 1.6400 inches maximum
- Spline Tooth Diametral Pitch
- 120 single shaft
- Shaft Thread Series Designator
- unf single shaft
- Shaft Thread Direction
- right-hand single shaft
- Shaft Thread Class
- 2a single shaft
- Body Material
- steel corrosion resisting
- Terminal Location
- rear
- Shaft Thread Length
- 0.1730 inches nominal single shaft
- Plus J Zro Reactance In Ohms
- 270.00 nominal
- Plus J Zso Reactance In Ohms
- 46.00 nominal
- Plus J Zrs Reactance In Ohms
- 21.00 nominal
- Shaft Type
- spline w/threads single shaft
- Alignment Hole Depth
- 0.0500 inches maximum
- Transformation Ratio
- 0.454 rotor to stator nominal
- Alignment Hole Bolt Circle Diameter
- 0.8120 inches nominal
- Shaft Nominal Thread Size
- 0.125 inches single shaft
- Terminal Type And Quantity
- 5 wire lead
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5990-00-646-9806 | No Name Available | 05/08/1980 |
| 5990-00-821-6259 | No Name Available | 09/01/1982 |
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| 229-0176-00 | Receiver Synchro |
| R925-21N | Receiver Synchro |
| TRC11JS2 | Receiver Synchro |
| TRH-11-JS-2 | Receiver Synchro |
| TRH11JS2 | Receiver Synchro |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5990-00-686-4902?
The FSCG of the NSN 5990-00-686-4902 is 5990
Does the NSN 5990-00-686-4902 have a Schedule B code assigned?
Yes, the Schedule B code is 9014900000
Does NSN 5990-00-686-4902 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5990-00-686-4902 contain precious materials?
Precious metal content is unknown
Does NSN 5990-00-686-4902 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5990-00-686-4902 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963
Professional Distribution
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- AS9120 Quality Standards
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