MIL-G-80267
All screws, pins, bolts, and other fasteners
3.2.3 Fastening devices.
Fastening
shall be installed in a manner to prevent change of tightness.
devices subject to removal or adjustment shall not be swaged, peened,
staked, or otherwise permanently installed.
Surfaces.
All surfaces shall be clean and free of sand, dirt,
3.2.4
fins, sprues, flash, scale, flux, and other harmful or extraneous materials.
All edges shall be either rounded or beveled unless sharpness is required to
Except as otherwise specified herein, the
perform a necessary function.
condition and finish of all surfaces shall be in accordance with the manu-
facturer's commercial practice.
Painting.
Unless otherwise specified (see 6.2,1), the machine
3.2.5
shall be painted in accordance with the manufacturer's commercial practice.
All threaded parts used on the machine and its related
3.2.6 Threads.
attachments and accessories shall conform to FED-STD-H28 and the applicable
"Detailed Standard" section reference therein.
3.2.7 Dials. All rotating dials or handwheels which are used to position
machine axes or for tool movement shall be graduated in increments not
larger than 0.001 inch.
Dial and handwheel diameters shall be permanently
and legibly engraved or etched on a nonglare background with graduation that
can be read from the operator's normal position. .
3.2.8 Gears.
All gears and pinions used in the machine or its compo-
nents, shall be properly selected for the intended application and fabricat-
ed to either English (USA) standards per AGMA 390.03 and AGMA 360.02 or
Metric (SI) standards per the International Organization for Standardiza-
tion, ISO-R-1122 and 1SO-54.
3.2.9 Machine ways. The machine ways shall be adequately protected when-
l
ever possible to exclude grinding dust, dirt, coolant, and other hazards
that may cause damage or result in inaccurate functioning of any members.
The machine ways shall be hardened and ground and suitable for the high
grade precision numerically controlled machine covered by this specifica-
t ion.
3.2.10 Electromagnetic interference control. When specified (see 6.2.1),
.,
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equipment furnished under this specification shall comply with the require-
ments of MIL-STD-461.
The equipment and subsystems class and the emission
and susceptibility requirements shall be as specified.
3.3 Components.
The machine shall consist basically of the following
components.
Any additional components necessary for the operation of the
machine shall be furnished in accordance with manufacturer's standard prac-
tice.
3.3.1 Base. The base shall be a casting of iron, iron alloy or a fabri-
cated weldment, ribbed and braced to minimize distortion, vibration, and
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