Worm gear hub

A gear blank comprising:

• a disk having a first face axially disposed opposite a second face, wherein the disk has an outer circumferential edge defining a disk diameter, the outer circumferential edge oriented orthogonally relative to the first face and the second face;
• a first plurality of individual lugs formed on said first face, wherein each lug of said first plurality of individual lugs extends orthogonally from the outer circumferential edge and radially between the outer circumferential edge and a first inner circumferential edge formed on said first face along a first retaining diameter, said first retaining diameter generally less than the disk diameter, circumferentially adjacent lugs of said first plurality of individual lugs having a first circumferential spacing therebetween, each of the first plurality of individual lugs having a pair of lug lateral edges, a lug outer edge and a lug inner edge, the pair of raised lateral edges each having a common radial length that is substantially equal to a length of at least one of the lug outer edge and the lug inner edge;
• and
• a second plurality of individual lugs formed on said second face opposite and offset the first plurality of individual lugs, wherein each lug of said second plurality of individual lugs extends between the outer circumferential edge and a second inner circumferential edge formed on said second face along a second retaining diameter, said second retaining diameter generally less than said disk diameter, circumferentially adjacent lugs of said second plurality of individual lugs having a second circumferential spacing therebetween.