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Transverse pressure angle: |
Ad=arctan(tan(An)/cos(h))
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Transverse circular tooth thickness on pitch diameter: |
td=tn/cos(h))
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Helix angle on base diameter: |
H=arctan(tan(h)*cos(An))
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Transverse pin diameter: |
dD=D/cos(H))
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Pitch diameter: |
PD=N/(DP*cos(H))
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Base diameter: |
BD=PD*cos(Ad))
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Involute function of Ad(rad): |
InAd=tan(Ad)-Ad*Pi/180
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Involute function of Bd(rad): |
InBd=td/PD+dD/BD+InAd-Pi/N
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Pressure angle to pin center Bd: |
InBd=Tan(Bd)-Bd*Pi/180
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Diameter of pin centers: |
CC=BD/cos(Bd)
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Dimension over pins: |
DO=CC+D (even); DO=cos(0.5*Pi/N)*CC+D (odd)
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Pressure angle to point at tangency: |
F=arctan(tan(Bd)-D*cos(H)/BD)
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Radius to point of tangency: |
RF=BD/2/cos(F)
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