4.齒底(根)圓錐度

變數Ⅰ

Re =

= 41.777

sinθa = 3.125 / 41.777

θa = sin-1( 3.125 / 41.777 )

= 4.278˚

件3的齒頂圓錐角 = 節圓錐角(θ) - θb

= 38.928˚ - 4.278˚

= 34.65˚

變數Ⅱ

Re =

= 41.552˚

sinθa = 3.125 / 41.552

θa = sin-1( 3.125 / 41.552 )

= 4.301˚

件3的齒頂圓錐角 = 節圓錐角(θ) - θb

= 43.781˚ - 4.301˚

= 39.48˚