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to be larger than the gear profile shift. A balanced profile shift between pinion and
gear has the advantage that the tip of the one member fits the root of the mating
member without collision in the opposite member’s root transition area. As visible
in Figure 1, the topland of the tooth with a profile shift of X = -.3 shows potential
not to fit in the reduced size root fillet of the tooth with a profile shift of X = +0.3.

It has to be considered that the pre-corrected pitch angles of the independent
profile shift method will also change the pitch angles if a V0 shift is applied. In case
of the common V0 profile shift, the original pitch angles (without profile shift) will
remain. With the independent profile shift, the pitch angles are changing with the
pre-correction of the shaft angle. After the profile shifts are applied to pinion and
gear, the shaft angle will return to its original value, but the pre-corrected pitch
.

angles will stay and will not reflect the relationship g 1 + g 2 = SHowever, the
working pitch angles replace the original pitch angles and add up to the shaft
angle of the gearset.

10.7 Literature

[1] AGMA 901-A92 “A Rational Procedure for the Preliminary Design of Minimum
Volume Gears”, American Gear Manufacturers Association,
Alexandria, VA, 1992, Annex A

[2] ISO 21771-1 “Gears-Cylindrical Gears and Gear Pairs - Concepts and
Geometry”, Draft 2022

[3] Stadtfeld, H.J. “Gleason Bevel Gear Technology, The Science of Gear
Engineering and Modern Manufacturing Methods for Angular
Transmissions”, Company Publication, The Gleason Works,
Rochester, New York, March 2014, Pages 103 to 106

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