MIL-L-23400E
In the event of a conflict between the text of
2.3 Order of precedence.
this specification and the references cited herein (except for associated
detail specifications, specification sheets or military standards), the text
of this specification shall take precedence. Nothing in this specification,
however, shall supersede applicable laws and regulations unless a specific
exemption has been obtained.
3.
REQUIREMENTS
3.1 First article. When specified in the contract or purchase order (see
6.2.1), a sample shall be subjected to first article inspection (see 4.4 and
6.3).
3.2 Design. The lathe shall be new and one of the manufacturer's current
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.
models capable of operations in accordance with the requirements herein.
The lathe shall include all components, parts, and features necessary to
meet the performance requirements specified herein.
All parts subject to
wear, breakage, or distortion shall be accessible for adjustment, replace-
ment , and repair.
Use of a spacer between the headstock and the bed to
achieve the capacity required in this specification shall not be accept-
able.
Unless otherwise specified, either the U.S.
3.2.1 Measurement systems.
Customary System of Units (US) or the International System of Units (S1)
shall be used in the design and construction of the lathe.
When only one
system of measurement is acceptable, the particular system required shall be
as specified (see 6,2.1).
In this specification, all measurements, dimen-
sions, sizes, and capacities are given in US units. These measurements may
be converted to SI units through the use of the conversion factors and
methods specified in FED-STD-376.
3.2.1.1 Measuring and indicating device calibrations.
Unless otherwise
specified, both the U.S. Customary System of Units (US) and the Interna-
tional System of Units (SI) shall be used to graduate measuring and indicat-
ing 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 lathe shall be
graduated in the same system.
3.2.1.2 Digital readout system.
Unless otherwise specified (see 6.2.1),
a digital readout system shall be provided on the X and Z axes of travel.
The digital readout system shall consist of a position feedback device, an
electronic display for each axis and all related components, mounting hard-
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