Find Helix Angle = f(pitch, or height & revolution)
Find Helix Angle = f(pitch, or height & revolution)
(OP)
For a milled cutter, I am given the specification of 10 degree helix angel (angle to the axis of the cylinder).
In Solidworks, I can only define the helix in terms of pitch; or height and degrees of revolution.
How can I determine pitch when given the helix angle?
I cannot find the answer in Marks Handbood or Machinery's Handbook, www.eng-tips.com, www.engineers.com
Thanks for any pointers you can give me.
Ken Apacki
In Solidworks, I can only define the helix in terms of pitch; or height and degrees of revolution.
How can I determine pitch when given the helix angle?
I cannot find the answer in Marks Handbood or Machinery's Handbook, www.eng-tips.com, www.engineers.com
Thanks for any pointers you can give me.
Ken Apacki





RE: Find Helix Angle = f(pitch, or height & revolution)
If your cutter diameter = D and your Pitch Angle = A then
the pitch will be;
P = Pi * D * Tan(90-A)
If the the cylindrical surface of the cutter is developed or unrolled into the flat then the helix becomes a right angled triangle whose base is the circumference and the height is the pitch.
The helix angle is between the hypotenuse and the height.
Cheers,
Dave
RE: Find Helix Angle = f(pitch, or height & revolution)
where D is the diameter at which the angle α is to be measured.
prex
http://www.xcalcs.com
Online tools for structural design
RE: Find Helix Angle = f(pitch, or height & revolution)
P = π · d2 · tan ψ
where
P is thread pitch (assuming a single start thread)
π = 3.141 592 654
d2 is the pitch diameter
prex shows the same equation, with ψ = α
The helix angle is the compliment of the lead angle, so kapitan's equation is correct assuming the terms helix angle and pitch angle are identical.
RE: Find Helix Angle = f(pitch, or height & revolution)
Your answers are very clear and I have my answer.
Strange that I couldn't find this in the mechanical handbooks.