MIL-L-23400E
buttons, light bulbs, fuses, braking mechanisms, and solid-state devices.
Tooling and accessories normally supplied as standard items shall also be
considered replacement parts.
3.3 Construction.
The lathe shall be constructed of parts which are new,
The structure shall be capable of
without defects, and free of repairs.
withstanding all forces encountered during operation of the lathe to its
maximum rating and capacity as specified herein without distortion.
All castings and forgings shall be free of
3.3.1
Castings and forgings.
scale and mismatching.
No processes such as welding, peening, plugging, or
filling with solder or paste shall be used for reclaiming any defective
part.
3.3.2
Fastening devices.
All screws, pins, bolts, and other fasteners
shall be installed in a manner to prevent change of tightness.
Fastening
devices subject to removal or adjustment shall not be swaged, peened, staked,
or otherwise permanently installed.
3.3.3
Surfaces.
All surfaces shall be clean and free of sand, dirt,
fins, sprues, flash, scale, flux, and other harmful or extraneous materials.
All edges shall be either rounded or beveled unless sharpness is required to
perform a necessary function.
Except as otherwise specified herein, the
condition and finish of all surfaces shall be in accordance with the manu-
facturer's commercial practice.
3.3,4 Welding,
Welding,
brazing, or soldering.
soldering
brazing or
shall be employed only where specified in the original design.
None of
these operations shall be employed as a repair measure for any
defective
part .
3.3.5
Unless otherwise specified (see 6.2.1), the lathe shall
Painting.
be painted in accordance with the manufacturer's commercial practice.
3.3.5.1 Protective finish. When specified (see 6.2.1), the following pro-
tective finish requirement shall apply.
All surfaces to be painted shall,
immediately prior to painting, be cleaned and dried and be free of foreign
matter. The protective paint coating shall be at least 0.0020 inches thick and
shall have the hardness and adhesion necessary for the prevention of scuffing
and peeling. Where no protective finish is utilized (such as bedways, machine
guide surfaces, etc.) the natural finish of the material or the finish obtained
from heat treatment is permissible provided the surfaces are free from scale or
corrosion.
3.3.6 Threads. All threaded parts used on the lathe and its related attach-
ments and accessories shall conform to FED-STD-H28 and the applicable "Detailed
Standard" section reference therein.
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