MIL-G-23823E
3.2.8 Interchangeability.
All parts of the end item shall be manufactured
to definite standards, dimensions, and tolerances that will provide the inter-
changeability of the respective replacement parts between end items of the
same model without modification of the part or machine. All replacement parts
shall be domestically available.
grinding machine shall be constructed of parts
3.3 Construction. The
which are new, without defects, and free of repairs. The structure shall
withstand all forces encountered during operation of the machine to its
maximum rating and capacity without permanent distortion or failure.
3.3.1 CastinGs and forgings. All castings and forgings shall be free of
defects, scale, and mismatching. No processes such as welding, peening, plug-
or filling with solder or paste shall be used for reclaiming any
ging,
defective part. Such processes may be used only for enhancing surface finish
and appearance.
3.3.2 Fastening devices. All fasteners shall be installed to prevent
change of tightness. Fastening devices subject to removal or adjustment shall
not be permanently installed.
3.3.3 Surfaces. All surfaces shall be clean and free of 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 manufacturer's commercial practice.
3.3.4 Welding, brazing. or soldering. Welding, brazing, or soldering shall
be employed only when specified in the original design. Any excess material
used in such processes shall be thoroughly removed from the part(s) upon
completion of the operation.
3.3.5 Painting.
Unless otherwise specified (see 6.2), the paint color and
with the manufacturer's commercial
be in accordance
application shall
practice.
3.3.6 Threads. All threaded parts used on the machine and its related
attachments and accessories shall conform to FED-STD-H28 and the applicable
"Detailed Standard" section referenced therein.
3.3.7 Drive train gears. All gears of spindle and axis drive trains shall
conform to or exceed all provisions of AGMA 390.03a, AGMA 2000-A88 and AMA
2001-688 for the inch-pound system of measurement or ANSI/ISO 54 for the
metric system of measurement. Drive train gears shall be of proper width and
size to transmit full-rated torque and horsepower throughout the speed ranges
without failure for the expected service life of the machine. Gears in the
drive train shall be hardened and ground steel. Working surface hardness
shall be not less than Rockwell C-48.
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