3.3 Design and construction. The design and construction of the actuator
shall be in accordance with the requirements specified herein.
3.3.1 Materials. The materials shall be entirely suitable for the purpose
intended. Materials shall be selected on the basis of strength, workability
and compatibility with other materials in the item to minimize galvanic action
(see MIL-STD-1250). Mounting interfaces shall be constructed of materials
that are compatible with the cadmium plated steel bolts and cadmium plated
3.3.2 Finishes. Finishes shall be applied to all materials, whenever
applicable, and shall be entirely suitable for the purpose intended, such as
corrosion resistance and increased durability.
3.3.3 Surface texture. Surface texture shall be not greater than 250
microinches measured in accordance with ANSI B46.1. There shall be no sharp
edges or burrs.
3.3.4 Interchangeability. All actuators having the same vendor part number
shall be internally and externally identical.
3.3.5 Marking, All parts shall be marked as specified on the applicable
drawing or in accordance with MIL-STD-130 if not specified on the drawing.
The item identification and part number requirements of DOD-STD-1OO shall
govern the part numbers and changes thereto.
3.3.6 Nameplates. Identification for actuators shall be in accordance with
the applicable drawing for the actuator being procured.
220.127.116.11 Dimensions. The actuator envelope dimensions shall be in accordance
with the applicable drawing for the actuator being procured.
18.104.22.168 Electrical interface. The actuator cable interface shall be in
accordance with the applicable drawing for the actuator being procured.
The weight of the actuator shall be not greater than 1 pound.
3.3.9 Lubrication. If lubricants are used, they shall not be of a toxic
nature or of such a nature to cause injury to personnel.
3.3.10 Power requirements.
22.214.171.124 Input power. The actuator shall operate from a 28 volt direct
current (VDC) power source with the characteristics and limits defined in
MIL-STD-704, except that the actuator shall operate over a range of 20 to 32
VDC. The rated voltage of the actuator shall be 28 VDC. The actuator shall
operate when voltage Is applied not less than 20 milliseconds and not greater
than 15 seconds. The total "on" time shall be not greater than 15 seconds at
a 20% duty cycle.
126.96.36.199 Current. The current drawn by the actuator shall be not greater
than 2.5 amperes at 28 VDC at room temperature (see 188.8.131.52.1).
3.3.11 Plunger force. The actuator plunger thrust force shall be not less
than 30 pounds after 1/16 inch travel or less than 20 pounds during the full