MIL-G-80267
The hydraulic system, when supplied, shall be
3.3.11 Hydraulic system.
complete with pumps, valves, piping, cylinders, reservoir, and pressure con-
trols. Overpressure protection shall be provided on the high pressure line
The system shall
from the hydraulic pump to prevent damage to components.
include filters to insure delivery of clean fluid. The reservoir shall have
a sight gage to indicate fluid level. The fluid temperature shall be main-
tained within the proper operating range during all normal operations of the
machine.
3.3.12 Pneumatic system. Unless otherwise specified (see 6.2.1), a pneu-
Shop air shall be provided having a line
matic system shall be provided.
pressure of 90 to 120 pounds per square inch (psi). The machine shall have
an air line filter, water trap, and oil mist lubricator, as necessary. The
system shall include all devices such as pressure regulators, pressure
reducers, solenoid valves, and check valves that are necessary to meet the
Air pressure gauges shall be provided to
requirements specified herein.
indicate input air pressure in all lines that are downstream from a pressure
control device.
Unless otherwise specified (see 6.2.1), the
Electrical system;
3.3.13
electrical system shall conform to ANSI/NFPA 79. Unless otherwise specified
(see 6.2.1), the machine shall be operable on a 440 volts (with an allowable
three phase, 60 hertz (Hz) source and
line fluctuation of +10 percent),
It shall be possible
shall be initially wired for operation on 440 volts.
to operate all electric equipment on the machine after connection to a
single power source.
Motors shall be rated for continuous duty and shall
Motors.
3.3.13.1
have ball or-r bearings of the sealed and permanently lubricated type.
Unless otherwise specified (see 6.2.1), each motor enclosure shall meet the
Electric motors shall be either
requirements for dripproof enclosure.
alternating current (AC), 3 phase,60 Hz or industrial direct current (DC)
motors conforming to ANSI/NEMA MG-1, equipment with solid state rectifier.
Variable speed DC spindle motors shall develop rated horsepower through at
least 90 percent of the range of spindle speeds available from a gear train
or direct coupling. Pneumatic motors shall be of the vane or impulse reac-
tion turbine air motor type controlled by the regulation of air pressure
(see 3.3.12).
Auxiliary control circuits shall be
Control-circuit `voltage.
3.3.13.2
isolated from the input electric power supply by a low-voltage transformer
having a secondary voltage no greater than 115 volts.
3.3. 13.3 Main electrical-disconnect. A manually operated fusible discon-
nect twitch or circuit breaker of adequate size to carry the entire electri-
cal load of the equipment shall be provided for connection to the primary
power source specified.
The machine offered shall be completely pro-
3.3.14 Numerical-control.
grammable through a microprocessor type computerized numerical control (CNC)
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