MIL-L-23400E
shall have means for draining and cleaning. Means shall be provided to per-
mit the operator to direct and control the amount of coolant.
3.4.14. Electrical system. Unless otherwise specified (see 6.2.1), the
Each lathe shall draw all
electrical system shall conform to ANSI/NFPA 79.
of its electrical power from a single 230/460-volt, 3-phase, 60-hertz (Hz)
circuit. Each machine shall have a fused safety disconnect switch or cir-
cuit breaker.
The lathe shall be initially wired for operation on 460
An identified terminal for grounding the machine when it is
volts.
installed shall be mounted in or near the disconnect switch.
The terminal
shall be suitable for connecting the size grounding conductor specified in
ANSI/NFPA 79 for the disconnect fuse rating.
The wiring in each machine
shall have individual point-to-point color coded wires in conformance with
ANSI/NFPA 79.
Diagrams/schematics shall clearly identify the individual,
point-to-point color coded wire and wire termination point location in the
electrical system.
Motors shall be rated for continuous duty and shall
3.4. 14.1 --
Motors.
.
have ball or roller bearings of the sealed and permanently lubricated type.
Alternating-current (AC) motors shall be designed to operate on 60-hertz
(Hz) unless otherwise specified (see 6.2.1).
Unless otherwise specified
(see 6.2.1), each motor enclosure shall meet the requirements for a drip-
Motor horsepower
proof enclosure, and the requirements of ANSI/NEMA MG1.
ratings shall conform to or exceed the requirements of table I.
Unless otherwise specified (see 6.2.1), the
3.5 Sizes and capacities.
size and characteristics of the machine shall be not less than those
specified in table I for the machine size specified.
Each lathe shall meet the
3.6 Alignment and performance accuracies .
alignment and performance accuracies set forth in table II using the tests
described in ANSI B5.16, "Accuracy of Engine and Tool Room Lathes." Type I
lathes shall meet or exceed the values found under the heading "Engine
Lathes" under the proper size for the lathe specified. Type II lathes shall
meet or exceed the values found under the heading "Tool Room Lathes."
3.7
Standard equipment.
Unless otherwise specified (see 6.2.1), each
machine shall be furnished with all standard equipment normally furnished by
the machine manufacturer. The following shall also be included as standard
equipment.
3.7.1 Lathe centers and center sleeve. One headstock center and one
tailstock--center shall be furnished.
One headstock center sleeve shall be
provided for adapting the taper in the spindle nose to the taper of the
The centers shall be hardened to Rockwell C-62 to C-66.
center supplied.
The centers and the sleeve shall be ground to within 0.0002 inch total indi-
cator reading for concentricity when inserted in the headstock and checked
for concentricity over their entire lengths.
3.7.2 Chuck and chuck jaws. The number and type of chuck and chuck jaws
shall be as specified (see 6.2.1), shall be steel and shall conform to the
applicable requirements of ANSI B5.8.
A self-ejecting chuck key shall be
provided for each chuck.
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