For years, the international gear manufacturing industry has been pushing machine manufacturers to develop an economical realizable tooth flank modification that is made in contact direction, with a soft transfer from the modified to unmodified sections of the tooth.

To meet these demands, Höfìer has developed, and is already implementing, Generated Engagement Relief Modifications. The tooth flank is modified at the areas of engagement only as opposed to the entire tooth flank as is the case with conventional modifications. The paper will disaiss the advantages of this new technology over conventional modifications and discuss how to produce generated engagement relief modifications.