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Lewis factor for profile shifted gears

Lewis factor for profile shifted gears

Lewis factor for profile shifted gears

(OP)
Does anyone has a good source or information how to calculate the corrected Lewis factor for shifted profile gears?

RE: Lewis factor for profile shifted gears

It is the same procedure that is used for standard gears.
You need to layout the gear as a 1 dp gear and use the same method.  You start out by drawing a line from the tip tangent to the base circle.  Where this line intersects the centerline of the tooth, draw a line from this point
tangent to the fillet radius.  Draw a perpendicular line
from that point of intersection to the tooth centerline.  From that fillet radius tangent point draw a horizontal line to the the tooth centerline.  x is then the vertical distance from the horizontal line down to the other intersection line at the tooth centerline.  
Since y = 2/3 x, you have the lewis factor from the model.  I do it in acad often.
 

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