Treatment--------------------------------------------------------------------------------------------- Heat to 1525-1550,
quench in oil,
draw;
Rockwell
"C"-34-38.
f. Fast Gear Sliding Gear.
Number required ------------------------------------------------------------------------------------ 1.
Material------------------------------------------------------------------------------------------------ A5140 fine grain
---------------------------------------------------------------------------------------------------------- HRS.
Rough weight ---------------------------------------------------------------------------------------- 7.33 lb.
Finished weight-------------------------------------------------------------------------------------- 3.25 lb.
Outside diameter------------------------------------------------------------------------------------ 4.330-4.325.
Number of teeth b ---------------------------------------------------------------------------------- 16.
Pitch---------------------------------------------------------------------------------------------------- 4/5.
Depth of teeth---------------------------------------------------------------------------------------- 0.4543.
Inside diameter, large------------------------------------------------------------------------------ 1.750-1.749.
Overall width ----------------------------------------------------------------------------------------- 1 3/8.
Treatment--------------------------------------------------------------------------------------------- Heat to 1525-1550,
quench in oil, draw;
Rockwell "C"-34-
38.
g. First Countershaft Pinion.
Number required ------------------------------------------------------------------------------------ 1.
Material------------------------------------------------------------------------------------------------ 40-50 carbon steel
forging.
Width of teeth ---------------------------------------------------------------------------------------- 2 1/8.
Thickness --------------------------------------------------------------------------------------------- 3.
Number of teeth ------------------------------------------------------------------------------------- 26.
Pitch---------------------------------------------------------------------------------------------------- 3.
Outside diameter------------------------------------------------------------------------------------ 9.332-9.328.
Depth of teeth---------------------------------------------------------------------------------------- 0.7190.
Bore before heat treatment ----------------------------------------------------------------------- 1.742-1.740.
Bore after heat treatment ------------------------------------------------------------------------- 1.7722-1.7717.
Keyway width ---------------------------------------------------------------------------------------- 0.500-0.499.
Treatment--------------------------------------------------------------------------------------------- Heat to 1475-1525,
quench in oil,
draw; Rockwell
"C" 22-.26.
h. Main Spur Gear.
Number required ------------------------------------------------------------------------------------ 1.
Material------------------------------------------------------------------------------------------------ C1045 steel forging.
Rough weight ---------------------------------------------------------------------------------------- 907.2 lb.
Outside diameter------------------------------------------------------------------------------------ 35.200-35.195.
Number of teeth ------------------------------------------------------------------------------------- 86.
Pitch---------------------------------------------------------------------------------------------------- 2 1/2.
Depth of teeth---------------------------------------------------------------------------------------- 0.8628.
Width of teeth ---------------------------------------------------------------------------------------- 2 1/2.
Number of holes ------------------------------------------------------------------------------------ 12.
Hole diameter---------------------------------------------------------------------------------------- 49/64 drill.
i. Second Counter8haft Pinion.
Number required ------------------------------------------------------------------------------------ 1.
Material------------------------------------------------------------------------------------------------ A51400H HRS.
Rough weight ---------------------------------------------------------------------------------------- 46.6 lb.
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