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FSC 5990 | Synchros And Resolvers
MIL-S-20708/74

Model: MIL-S-20708/74

Receiver-transmitter Synchro

Properties:

Body Material

Steel, stainless

Body Style

Standard round double flange a

Shoulder Diameter

Between 3.3290 inches and 3.3340 inches

Pilot Diameter

1.6250 inches

Second Shoulder Diameter

Between 3.3740 inches and 3.3750 inches

Second Shoulder Length

0.3750 inches

Overall Length

5.9500 inches

Flange Diameter

Between 3.6240 inches and 3.6250 inches

Flange Thickness

0.2500 inches

Body Diameter

Between 3.3850 inches and 3.3900 inches

Shaft Diameter

0.2403 inches single shaft and 0.2405 inches single shaft

Shaft Length

0.7000 inches single shaft

Fragility Factor

Moderately rugged

Distance Between Flanges

1.8120 inches

Maximum Tempurature Rise

35.0 degrees celsius

Body Size

Rotor Input Voltage Rating In Volts

115.0

Frequency In Hertz

60.0

Rotor Input Current Rating

830.0 milliamperes

Rotor Input Electrical Power Rating

9.25 watts

Zss Impedance Magnitude In Ohms

Between 7.00 and 10.00

Zss Impedance Angle In Deg

Between 30.00 and 40.00

Phase Shift Angle In Deg

3.000 input to output

Maximum Fundamental Null Voltage In Millivolts Per Volt

35.00 output

Maximum Total Null Voltage Output In Millivolts Per Volt

170.00

Electrical Error Angular Range In Minutes

-10.0/+10.0

Spline Tooth Quantity

22 single shaft

Receiver Error Angular Range In Minutes

-36.0/+36.0

Torque Gradient Per Angular Deg

0.900 inch-ounces

Pilot Length

0.1600 inches

Shoulder Length

0.6550 inches

Mounting Surface To Terminal End Distance

5.0600 inches

Spline Tooth Diametral Pitch

96 single shaft

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

0.3100 inches single shaft

Shaft Type

Spline w/threads single shaft

Transformation Ratio

0.783 rotor to stator

Shaft 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", "", etc.).

Terminal Type And Quantity

5 screw

Specification Data

81349-mil-s-20708/74 government specification

NSN

5990-00-852-2369

Part Number

MIL-S-20708/74

Description

Synchro,receiver-transmitter

CAGE

81349

A synchro having a dual purpose. It may be used in applications requiring either a receiver or transmitter. For synchros having a single purpose, see synchro, receiver and synchro, transmitter.

Part MIL-S-20708/74 NSN 5990-00-852-2369

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

27218

FIIG:

A07800

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

8.0000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

062120

UFC:

34760

LTL:

RATING VARIABLE

LCL:

WCC:

593

TCC:

SHC:

ACC:

Instruments/Radio

End Items End applications NSN 5990-00-852-2369 is a component of

Series An/sps-49(v) Radar
Mk 92 (fcs) Fire Control System
Non-trident Exterior Communication
An/uya-4(v) Tactical Data System
115 Ft Utility Landing Craft
Wind Measuring And Indicating System Wmis
Los Angeles Class Ssn (688)
Sturgeon Class Ssn (637)
Ticonderoga Class Cg (47)

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Schedule B and Export

Schedule B: 9014900000
SITC: 87412
End Use: Marine engines, parts
NAICS: 334511
USDA: 1

Freight Class: Parts & accessories for direction finding compasses and other navigational instruments and appliances