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|  MLL-S-3644B
3.4.3 Shafting. The shafting shall be left-lay constructed of at least
five Layers of steel wire, alternately wound on a mandrel. The outside dia-
meter of the completed shafting shall be 0.150 +0.000 inch,
-0.005
3.4.3.1 Shafting ends. The ends of the shafting shall be formed cold to a
hexagonal cross section, or other means shall be taken to prevent untwisting
during rough handling , shipping, et cetera. (See assembly drawing on
figure 1).
3.4.4 Sleeve (casing end fitting.
The sleeve shall be in accordance with
detail 3 on figure 1A.
The spline assembly shall be
3.4.5 Spline assembly (shaft end fitting).
in accordance with detail 1 on figure 1.
3.4.6 Coupling nut. The coupling nut shall be in accordance with detail 2
on figure 1. Screw-threads shall be of the American National form, in accord-
ance with Handbook H28.
3.4.7 Tag. A tag shown in detail 4 on figure 1A shall be attached to the
tuning shaft in the location shown on the assembly drawing on figure 1.
3.5 Casing.
3.5.1 Bend. When tested as specified in 4.4.2.1, the casing shall not fail
or show permanent deformation or damage of any kind.
3.5.2 Pressure resistance. The casing shall show no evidence of leakage
when tested as specified in 4.4.2.2.
3.5.3 Static load. When tested as specified in 4.4.2.3, the casing shall
not fail or be damaged in any way.
3.5.4 Push-back. The casing shall withstand a 3/4 inch minimum push-back
per foot when tested as specified in 4.4.2.4.
3.6 Shafting.
3.6.1 Deflection due to torque. The angular deflecting of the shafting per
foot of shafting length shall not exceed 7.0 degrees in either direction when
tested as specified in 4.4.3.1.
3.6.2 Torque to rotate. The torque required to rotate the shaft shall not
exceed 0.12 pound-inch when tested as specified in 4.4.3.2.
3.6.3 Torsional strength. The shafting shall withstand a torque of 8 1/2
pound-inches in both the winding and unwinding directions without breaking or
showing permanent deformation when tested as specified in 4.4.3.3. The winding
direction is the direction in which the outside winding tightens.
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