M20708/53-001

View detailed technical data, stock status, and sourcing information for: M20708/53-001
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Federal Supply Group

Electrical and Electronic Equipment Components

Federal Supply Classification

5990 Synchros and Resolvers

National Stock Number

5990-00-060-2321

Item Name Code

15289

Assigment Date

06/13/1967 (59 years ago)

A synchro consisting of a stator and rotor inductively coupled. The electrical output of the rotor is dependent upon both the position of the rotor and the electrical input to the stator from a transmitter synchro or a differential synchro. Does not include variable resistors, goniometers, or variable transformers.

1.9985 inches minimum and 1.9995 inches maximum second shoulder diameter, unable to decode body material, 0.5950 inches nominal pilot diameter, standard round d body style, 1.9850 inches minimum and 1.9900 inches maximum shoulder diameter

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Body Material: unable to decode
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: 4.2990 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
Fragility Factor: moderately rugged
Maximum Temp Rise: 10.0 celsius
Body Size: 23
Stator Input Voltage Rating In Volts: 90.0 nominal
Stator Input Current Rating: 18.5 milliamperes maximum
Stator Input Electrical Power Rating: 400.0 milliwatts nominal
Frequency In Hertz: 60.0 nominal
Zso Impedance Magnitude In Ohms: 4200.00 minimum and 5100.00 maximum
Zso Impedance Angle In Deg: 70.00 minimum and 76.00 maximum
Zrs Impedance Magnitude In Ohms: 1350.00 minimum and 1650.00 maximum
Zrs Impedance Angle In Deg: 14.00 minimum and 20.00 maximum
Phase Shift Angle In Deg: 14.000 input to output nominal
Maximum Fundamental Null Voltage In Millivolts Per Volt: 30.00 output
Maximum Total Null Voltage Output In Millivolts Per Volt: 45.00
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
Shaft Radial Play Test Point: 0.125 inches nominal
Shaft Maximum Radial Play: 0.0010 inches
Shaft End Play: 0.0025 inches nominal
Pilot Length: 0.0430 inches nominal
Shoulder Length: unable to decode
Aft Of First Flange Diameter: 1.9985 inches minimum and 1.9995 inches maximum
Mounting Surface To Terminal End Distance: 3.5800 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
Terminal Location: rear
Shaft Thread Length: 0.2900 inches nominal single shaft
Shaft Type: spline w/threads single shaft
Transformation Ratio: 0.735 rotor to stator nominal
Shaft Nominal Thread Size: 0.250 inches single shaft
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: 5 screw
Specification/Standard Data: 81349-mil-s-20708/53 government specification

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5990-00-020-1060	No Name Available	05/01/1976
5990-00-553-6712	No Name Available	09/01/1982
5990-00-883-8818	No Name Available	01/01/1981

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:

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M20708-53-01	Control Transformer Synchro
M20708/53-001	Control Transformer Synchro
M20708/53-01D	Control Transformer Synchro
MIL-S-20708/53	Control Transformer Synchro
SAE-AS20708/53	Control Transformer Synchro
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