M20708-550-001

View detailed technical data, stock status, and sourcing information for: M20708-550-001
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Federal Supply Group

Electrical and Electronic Equipment Components

Federal Supply Classification

5990 Synchros and Resolvers

National Stock Number

5990-00-018-9721

Item Name Code

02071

Assigment Date

04/25/1967 (59 years ago)

A synchro, the rotor of which is mechanically positioned for modifying electrical angular information, received from a transmitter synchro and transmitting to receiver synchro or control transformer synchro electrical information corresponding to the sum or difference of the electrical input angle and its rotor position angle. Does not include variable resistors, goniometers, variable transformers, or items with dials.

0.1700 inches nominal second shoulder length, 1.9850 inches minimum and 1.9900 inches maximum shoulder diameter, standard round d body style, 1.9985 inches minimum and 1.9995 inches maximum second shoulder diameter, 0.5950 inches nominal pilot diameter

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 d
Shoulder Diameter: 1.9850 inches minimum and 1.9900 inches maximum
Pilot Diameter: 0.5950 inches nominal
Second Shoulder Diameter: 1.9985 inches minimum and 1.9995 inches maximum
Second Shoulder Length: 0.1700 inches nominal
Overall Length: 4.5490 inches nominal
Flange Diameter: 2.2490 inches minimum and 2.2500 inches maximum
Flange Thickness: 0.2500 inches nominal
Body Diameter: 1.9900 inches maximum
Shaft Diameter: 0.2403 inches minimum and 0.2405 inches maximum single shaft
Shaft Length: 0.7190 inches nominal single shaft
Maximum Temp Rise: 25.0 celsius
Body Size: 23
Stator Input Voltage Rating In Volts: 90.0 nominal
Stator Input Current Rating: 215.0 milliamperes maximum
Stator Input Electrical Power Rating: 4.8 watts maximum
Frequency In Hertz: 60.0 nominal
Zso Impedance Magnitude In Ohms: 370.00 minimum and 460.00 maximum
Zso Impedance Angle In Deg: 74.00 minimum and 78.00 maximum
Zrs Impedance Magnitude In Ohms: 175.00 minimum and 220.00 maximum
Zrs Impedance Angle In Deg: 15.00 minimum and 20.00 maximum
Phase Shift Angle In Deg: 11.500 input to output nominal
Electrical Error Angular Range In Minutes: -6.0 to 6.0
Spline Tooth Quantity: 22 single shaft
Actuator Friction Torque At Plus 25 Deg Celsius: 0.20 inch-ounces maximum
Torque Gradient Per Angular Deg: 0.030 inch-ounces minimum
Shaft Maximum Radial Play: 0.0010 inches
Shaft End Play: 0.0025 inches nominal
Pilot Length: 0.0430 inches nominal
Aft Of First Flange Diameter: 1.9985 inches minimum and 1.9995 inches maximum
Mounting Surface To Terminal End Distance: 3.8300 inches nominal
Spline Tooth Diametral Pitch: 96 single shaft
Shaft Maximum Runout: 0.0008 inches
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: 0.2900 inches nominal single shaft
Shaft Type: spline w/threads single shaft
Transformation Ratio: 1.154 rotor to stator nominal
Shaft Nominal Thread Size: 0.250 inches single shaft
Shaft Radial Play Determining Weight: 8.0 ounces
Shaft End Play Determining Weight: 16.0 ounces
Special Features: shaft radial play test point 0.125 inches nominal
Test Data Document: "81349-mil-s-20708 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Terminal Type And Quantity: 6 screw
Specification/Standard Data: 81349-mil-s-20708/55 government specification

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
23TDX1229	Differential Transmitter Synchro
23TDX6	Differential Transmitter Synchro
23TDX6B	Differential Transmitter Synchro
23TDX6C	Differential Transmitter Synchro
M20708-550-001	Differential Transmitter Synchro
M20708/55-001	Differential Transmitter Synchro
M20708/55-01C	Differential Transmitter Synchro
MIL-S-20708/55	Differential Transmitter Synchro
SAE-AS20708/55	Differential Transmitter Synchro

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5990-00-018-9721?

The FSCG of the NSN 5990-00-018-9721 is 5990

Does the NSN 5990-00-018-9721 have a Schedule B code assigned?

Yes, the Schedule B code is 9014900000

Does NSN 5990-00-018-9721 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 5990-00-018-9721 contain precious materials?

Precious metal content is unknown

Does NSN 5990-00-018-9721 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 5990-00-018-9721 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Tue, Apr 25, 1967