Model: M20708/68B-001

Differential Transmitter Synchro

Properties:

Body Style
Standard round, rotatable housing
Shoulder Diameter
Between 2.6999 inches and 2.7000 inches
Overall Length
4.6550 inches
Flange Diameter
Between 3.0990 inches and 3.1000 inches
Flange Thickness
Between 0.2450 inches and 2.2550 inches
Body Diameter
Between 2.7490 inches and 2.7500 inches
Shaft Diameter
0.2405 inches single shaft
Shaft Length
0.7200 inches single shaft and 0.7400 inches single shaft
Schematic Diagram Designator
1 y-rotor, 1 y-stator
Body Size
28
Stator Input Voltage Rating In Volts
90.0
Stator Input Current Rating
748.0 milliamperes
Stator Input Electrical Power Rating
7.7 watts
Frequency In Hertz
60.0
Zrs Resistance In Ohms
44.00
Rotor Dc Resistance In Ohms
24.00
Stator Dc Resistance In Ohms
19.00
Phase Shift Angle In Deg
6.500 input to output
Spline Tooth Quantity
22 single shaft
Actuator Friction Torque At Plus 25 Deg Celsius
0.50 inch-ounces
Torque Gradient Per Angular Deg
0.300 inch-ounces
Shaft Maximum Radial Play
0.0008 inches
Shaft End Play
Between 0.0010 inches and 0.0050 inches
Shoulder Length
Between 1.0150 inches and 1.0250 inches
Mounting Surface To Terminal End Distance
3.3850 inches
Spline Tooth Diametral Pitch
96 single shaft
Terminal Location
Rear
Shaft Thread Length
0.6900 inches single shaft and 0.7100 inches single shaft
Shaft Type
Spline single shaft
Transformation Ratio
1.154 rotor to stator
Terminal Type And Quantity
6 screw
Nondefinitive Specification/std Data
31tdx68 type
NSN
5990-00-702-1990
Part Number
M20708/68B-001
Description
Synchro,differential Transmitter
CAGE
81349

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.

Part M20708/68B-001 NSN 5990-00-702-1990

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
02071
FIIG:
A07800
Concept No.:
1
App. Key:
B
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
4.6000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
062120
UFC:
34760
LTL:
RATING VARIABLE
LCL:
70.0
WCC:
590
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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

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