GEARCALC/ page 6

Figure 10.8:

GEARCALC - Wizard page 6

This page allows the selections of a profile shift coefficient. Several proposals are made by the software.

General purpose The profile shift factor is calculated according to a formula by Robert Errichello: $x = -Σx---+ u --1- for speed reducers 1 u + 1 3u$ $-Σx--- x1 = u + 1 for speed increasers$
Balanced specific sliding The specific sliding at the beginning and the end of the contact has the same values on the root of the gears.
Best strength against bending Choose x for the best bending strength
Best strength against scoring Choose x for the best scoring resistance
Limit for undercut The profile shift factor should normally not be less than this value for the undercut boundary.
Limit for minimal topland The profile shift factor should not be bigger than this value. If you choose a bigger value the addendum has to be shortened to avoid a pointed tip..

This field allows the user to enter the appropriate profile shift coefficient setting based on the above proposals.