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What might be the Pressure Angle of a Helical Gear?

I am doing a Force and Velocity analysis of a Maruthi 800 Gear Box
I have got a bunch of data about that but i missed that some data's about that
One is Helical Angle of the Gear and the other is the Pressure angle of that geAR so some one can help me in finding that???

Replies

  • abhishek1814
    abhishek1814
    for 32 teeth its 14.5 and for 18 its 20 involute...
  • jhbalaji
    jhbalaji
    Oh dude...
    Thanks for that anyway
    But i need for the Maruthi Gear Box 800 in particular
    What you gave is i have already got from Theory of Machines and Mechanisms book by Joesph Shingley
  • athel.davis
    athel.davis
    Helix angle, Angle between a tangent to the helix and the gear axis,Is zero in the limiting case of a spur gear. Also Helix angleis a constant angle made by the helices with the axis of rotation.In case of normal circular pitch, pn,Circular pitch in the plane normal to the teeth.And transverse circular pitch, p Circular pitch in the plane of rotation of the gear. Sometimes just called "circular pitch". pn = pcos.In case of many other helix parameters can be viewed either in the normal or transverse planes. The subscript n usually indicates the normal.

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