Calculating Gear CTT Max/Min Actual from Span Measurement
Calculating Gear CTT Max/Min Actual from Span Measurement
(OP)
thread406-252168: Calculating Gear "Span"
Hi, I am looking for Direct formula to calculate Gear Circular tooth thickness Max/Min Actual from Given Span Measurement.
I have done some research on internet, but they show only formula to calculate theoretical Span from theoretical (pi/2) CTT. Calculating CTT Max/Min Act is not given anywhere.
Following spline details I have:
N = 27
Module= 2.0
Pressure Angle= 20 Deg
Addendum Mod. Coeff.= 0.8
Root Dia= 53.2
Span Over 4 teeth= 22.43/22.37
In the drawing it shows:
CTT Max/Min Actual = 4.215/4.151. I would appreciate if anyone tell how to calculate this value.
Thanks in Advance.
Hi, I am looking for Direct formula to calculate Gear Circular tooth thickness Max/Min Actual from Given Span Measurement.
I have done some research on internet, but they show only formula to calculate theoretical Span from theoretical (pi/2) CTT. Calculating CTT Max/Min Act is not given anywhere.
Following spline details I have:
N = 27
Module= 2.0
Pressure Angle= 20 Deg
Addendum Mod. Coeff.= 0.8
Root Dia= 53.2
Span Over 4 teeth= 22.43/22.37
In the drawing it shows:
CTT Max/Min Actual = 4.215/4.151. I would appreciate if anyone tell how to calculate this value.
Thanks in Advance.





RE: Calculating Gear CTT Max/Min Actual from Span Measurement
if one understands what it actually is and how the math covering the involute curves (creating the tooth profile) is applied.
To rely on some formula without knowing what and why it calculates is dangerous.
RE: Calculating Gear CTT Max/Min Actual from Span Measurement
RE: Calculating Gear CTT Max/Min Actual from Span Measurement
RE: Calculating Gear CTT Max/Min Actual from Span Measurement