Metric Gear Design Question About Dedendum 1

[JD P.E.]

I am looking at drawings for a paper machine gear train gear set and am trying to understand where some of these dimensions came from. The gears would have been designed by Swedish engineers in the 70's.

Gear Data:
Teeth = 64
Module 12.0000
Pressure Angle = 20 deg
Tooth Form = "Normal Deep Depth"
Helix Angle = 7.5 deg
Addendum = .472 inch
Whole Depth = 1.091 inch (1.063 STD)
Root Dia. = 29.260 inch
Normal Circ. Tooth Thickness = .722/.717 inch
Normal Chord Tooth Thickness = .722/.717 inch
Normal Chord Addendum = .476 inch
Pitch Diameter = 30.497 inch
OD = 31.441 inch

My questions are:
Does "Normal Deep Depth" give clue to the extended dedendum? I can't find that verbiage anywhere that ties to equations.
I found equations that give me matching numbers for addendum and whole tooth depth. But when I input gear data into a gear generator, the dedendum doesn't match which makes the tooth thickness not match the above. Is this a profile shifted gear? If so, where do the equations come from to match these numbers?

 

[mfgenggear]

https://www.abebooks.com/servlet/Bo...=problems+gears&cm_sp=snippet-_-srp1-_-image5

 

[spigor]

Where do you get calculations for your calculated diameter?

I'm not sure what diameter?
First the pitch diameter: d = mz/cos(B) = 12*64/cos(7.5 deg.) = 774.627 mm = 30.4971".
OD = d+2*m = 774.627+24 = 798.627 mm = 31.442".
Std root dia. = d-2*1,25*m = 744.627 mm = 29.316".
Std whole depth = (OD-Std root dia.)/2 = (31.442-29.316)/2 = 1.063".
All these formulas are to be found under KHKgears links above.

 

[mfgenggear]

tooth proportion agma 1003 buy it

 

[JD P.E.]

Thank you both very much. I have a better understanding. I’m not trying to engineer gears.