MIL-DTL-17060G(SH)
APPENDIX B
ENGINEERING DRAWINGS TECHNICAL CONTENT REQUIREMENTS
B.1. SCOPE
B.1.1 Scope. This appendix provides content requirements for motor drawings. When specified in the contract
or order (see 6.2), this appendix is a mandatory part of the specification. The information contained herein is
intended for compliance.
B.2. DRAWING CONTENTS
B.2.1 Drawings for service A motors. Drawings for Service A motors shall be multidetailed wherever possible,
and figure 5 may be used as a guide for format and arrangement. In addition, drawings shall contain the following
information:
a. An assembly end and side view showing all parts of the motor identified with piece number in the list of
materials and direction of mounting. The assembly side view shall show a longitudinal section of the motor above
the centerline. The assembly end view shall show a transverse quarter section above the centerline. These assembly
views shall clearly show the following information:
(1) Bearing housing construction, bearing fits and tolerances, preload devices and provision for shaft
expansion. The means of securing the preload device in the bearing housing. Bearing fits and tolerances may be
shown as a note on the drawing or on other assembly views.
(2) Method of retaining rotor core to shaft. Where a press fit is used to secure the cores to the shaft, the
interference fit and minimum pressure to force the core on the shaft shall be shown. Where a shrink fit is used to
secure the cores to the shaft, the interference fit and minimum pressure to remove the cores from the shaft shall be
shown.
(3) Dripshields, baffles, and screen guards, and the method used to attach them to the end shields or
frames.
(4) Method of attaching terminal box to frame.
(5) Method of bringing cables out of frame into terminal box and the method for protecting these cables
against chafing at sharp metallic corners.
(6) Method of clamping motor leads in the terminal box to prevent strain on internal connections and
method of protecting lead insulation against abrasion by the clamp.
(7) Method of attaching fan to shaft and detail of fan showing constructions and number of blades.
(8) Overall dimensions including mounting, shaft extensions and key.
(9) Method of securing stator core to frame to prevent axial and rotational movement, and the minimum
pressure to force the core in the frame shall be shown if a press fit is used in conjunction with other means. Where a
shrink fit is used, the pressure required to force the stator core out of the frame shall be shown.
(10) Lifting means where required (see 3.5.1.28).
(11) Direction of air flow.
(12) Total axial movement of the shaft to include bearing end play.
(13) For submarine motors, the center of gravity and radii of gyration about the three principal axes shall
be shown in the end and side views as appropriate.
(14) The nominal dimension and tolerance for the rabbet diameter for the frame and end shields shall be
shown.
(15) Details required by this specification and not covered in the foregoing enumeration.
b.
A detail working drawing of the shaft including bearing mounting dimensions.
c.
A schematic wiring diagram of the motor windings.
d. Drawing of wiring arrangement and stator connection diagram. A connection table of motor leads for two
or more speed or dual voltage motors.
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