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|  MIL-S-1123E
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3.4.2 Electromagnetic compatibility.- Equipment procured for Army shall
be designed and equipped for electromagnetic competibility in accordance
with Class IIB of MIL-STD-461 (see 4.5.2.) When specified (see 6.2),
equipment procured for Air Force shall be in accordance with Class IIB
of MIL-STD-461 (see 4.5.2).
3.5 Design and Construction.- All moving parts shall show no evidence
of undue vibration, noise, or overheating of bearings, and the starting
and stopping device shall operate smoothly and positively when subJected
to the operational test specified in 4.5.1.
3.5.1 Lubrication.- oil or grease fittings shall be incorporated in
accessible locations for use in lubricating bearings, as required. Pressure
oil lubrication shall not be used for motor bearings.
3.5.2 Clutches.- Clutches shall be engaged by a pedal conveniently
located for operation from a standing position.
3.5.3 Belt drives.- Machines furnished with belt drives shall be
provided with means for adjusting belt tension. Round belts shall be
waterproofed leather conforming to KK-B-211. V-belts shall be com-
position rubber and fabric of the type normally furnished in commercial
practice.
3.5.4 Machine bases.- The base supports on all machines shall be of
malleable iron, cast iron, or steel, and of rigid construction. Holes shall
be provided not less than one-half inch diameter to receive anchor bolts,
except as specified in 3.10.1.
3.5.5 Safety devices.- Exposed belts, shafts, pulleys, gears, and other
moving parts hazardous to operators shall be fully inclosed and guarded in-
so far as practicable, so as to prevent operator contacting same. Guards
shall be of malleable iron, steel, sheet metal, or wire mesh. All parts of
the guard shall be rigid, and secured so as to be removable without dis-
assembling operating parts of the machine. Guards fitted over parts
requiring frequent adjustment shall be hinged or shall be removable without
the need for tools.
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3.5.6 Wiring.- Wiring shall comply with NFPA Std. No. 70. Wires shall
be completely installed in flexible or rigid zinc-coated conduit or shall
be armored flexible cable. All connections shall be made between motors,
starters, and switches. Parts shall be installed on the machines with
sufficient slack to prevent breakage due to vibration.
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3.6 Tools.- Tools and wrenches necessary for the proper service,
maintenance, and adjustment of the equipment shall be furnished where
specified under detail requirements.
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