Crank-Pins. All specifications and test requirements mentioned under the discussion of driving and engine truck axles are applicable to crank-pins. Crank-pins are received by railroad companies in the rough forging and must, therefore, be turned to fit the wheel boss. They are forced in by hydraulic pressure, the pressures commonly employed being given in Table XVI.
TABLE XVI
Hydraulic Pressures Used in Mounting Crank-Pins
Diameter of Fit in Inches Pressure Employed in Tons Cast-Iron Center Cast-Steel Center 3 - 3½ 15 - 20 24 - 32 3½ - 4 20 - 25 32 - 40 4 - 4½ 25 - 30 40 - 48 4½ - 5 30 - 35 48 - 56 5 - 5½ 35 - 40 56 -64 5½ - 6 40 - 45 64 - 72 6 - 6½ 45 - 50 72 - 80 6½ - 7 50 - 55 80 - 88
Table of Contents; Page 105; Page 107; Index
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