MIL-L-23249C
3.2.1 Measurement systems. Unless otherwise specified, either the U.S.
Customary System of Units (US) or the International System of Units (SI)
system of measurement is acceptable. The particular system required shall
be as specified (see 6.2.1). If Customary System of Units (US) is
specified, means shall be provided to permit conversions to SI units. In
this specification, all measurements, dimensions, sizes and capacities are
given in the US. These measurements may be converted to the International
System of Units (SI) through the use of the conversion factors and methods
specified in ASTM-E-380. When specified (see 6.2.1), a digital readout
system providing conversion characteristics outlined above, shall be
furnished.
3.2.1.1 Measuring and indicating device calibrations. Unless otherwise
specified, either the U.S. Customary System of Units (US) or the
International System of Units (SI) shall be used to graduate measuring and
indicating devices such as scales, depth stops, carriage stops, dial
indicators, pressure gauges, temperature indicators, and other similar
devices. When only one system of graduation is acceptable, the particular
graduation required shall be as specified (see 6.2.1). Regardless of the
measurement system used, all measuring and indicating devices on the machine
shall be graduated in the same system..
3.2.1 .1.1 Dual calibrations. When specified (see 6.2.1), measuring and
indicating devices shall be graduated in both the US and the SI system of
When a dual US and SI system is furnished, both feed dials
measurements.
shall have independent zero adjustments and both dials shall be calibrated
in such a manner that the last dial graduation progresses into and is con-
tinuous with the first dial graduation as the dial is rotated through the
zero position.
3.2.2 Reclaimed materials. The machine may contain reclaimed materials
provided such materials will not jeopardize the machine's intended use and
performance. The reclaimed materials shall have been reprocessed, remanu-
factured or recycled in a manner which will restore them to the same chemi-
cal composition and physical properties as the materials originally selected
for use on the machine.
3.2.3 Energy efficiency. The lathe and all its applicable components
that directly consume energy in normal operation shall be designed and con-
structed for the highest degree of energy efficiency as governed by the
latest developments available within the industry.
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