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MIL-DTL-81963 Servocomponents, Precision Instrument, Rotating, Common Requirements And Tests, General Specification ForThis specification covers common requirements and tests for analog, digital and analog/digital precision instrument rotating servocomponents \(synchros, electrical resolvers, electrical, linear resolvers, transolvers, shaft angle encoders, servomotors, tachometer-generators, servomotor-tachometer generators, stepping motors, and gear heads\). This specification will be used with the applicable general specification, which covers a particular class of servocomponents \(for example, synchros\), together with the documents and the specification sheet that cite MIL-DTL-81963 as a direct reference detailing the specific requirement for the individual servocomponent.

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MIL-DTL-81963C

TABLE I. Qualification and conformance inspection tests.

Test

Require-

Test

Test method for examination

Inspection

No.

ment

Qualification

Conformance

Sample Number

3.6.1

4.9.1

Visual and mechanical inspection

1, 2, 3, 4

3.6.2

4.9.2

Shaft radial and end play

1, 2, 3, 4

Total shaft runout (smooth portion)

1, 2, 3, 4

1, 2, 3, 4

Rotor moment of inertia 1/

1, 2, 3, 4

3.6.5.1

4.9.5.1

Mechanical breakaway torque

1, 2, 3, 4

3.6.5.2

4.9.5.2

Electrical breakaway torque

(starting voltage)

3.6.6

4.9.6

1, 2, 3, 4

Dielectric withstanding voltage

1, 2, 3, 4

3.6.7

4.9.7

Insulation resistance

1, 2, 3, 4

Current

1, 2, 3, 4

Power

1, 2, 3, 4

3.6.10

4.9.10

Impedance

1, 2, 3, 4

3.6.11

4.9.11

Temperature rise

1, 2, 3, 4

3.6.12

4.9.12

Variation of brush contact resistance 1/

3.6.13

4.9.13

1, 2, 3, 4

Electromagnetic interference 1/

1, 2, 3, 4

3.6.14

4.9.14

Security of terminals/wire leads

1, 2, 3, 4

3.7.1

4.10.1

Vibration

1, 2, 3, 4

3.7.2.1

4.10.2.1

Shock, specified pulse

3.7.3.1

4.10.3.1

1, 2

Altitude, low temperature

1, 2

3.7.3.2

4.10.3.2

Altitude, high temperature

1, 2

3.7.4

4.10.4

Endurance

3, 4

3.7.5.1

4.10.5.1

Ambient low temperature

3, 4

3.7.5.2

4.10.5.2

Ambient high temperature

3, 4

3.7.6

4.10.6

Moisture resistance

1, 2, 3, 4

3.7.2.2

4.10.2.2

Shock, high impact

1, 2, 3, 4

3.7.7

4.10.7

Audible noise structureborne 1/

1, 2

3.7.8

4.10.8

Salt atmosphere 1/

1, 2

3.7.9

4.10.9

Explosion resistance 1/

1/ These tests are special and shall be performed only when required in the applicable general

specification.