As can be seen from the data table: From the analysis of the actual existence of the line of contact, the radius of curvature relative to induce and lubrication angle, two-node column worm drive better than "two package" drive, at least two quite.

Worm same radius, the central pillar of the worm from a two-node plane than two packs a worm small radius, in common ratio 1.26 series design, in general can be considered a small one: the output torque of the same, as long as the design, construction permits, spare parts, such as bearings, etc. when carrying capacity and life can meet the requirements, the small two-node transmission level available replace two packet transmission plane; at least, you can replace the drive with the same plane two package sizes two-node cylindrical worm drive.

According to the authors analyzed in a multi-line splitter gear, the worm gear in a two-node positive side column has more advantages, because the diameter of the worm has no effect on the diameter of the worm wheel, can be solved by increasing the diameter of the worm and worm-yl radius of the circle into the issue of the worm tooth surface, this is one. Second choice Pillar ball worm (ie type Ⅱ worm Litwin presented) instead involute worm, easy to implement multi-line splitter gear, and the positive side to expand the contact area, and the contact line is not reduced; induce curvature and lubrication Angular little change; also engaging node automotive lubricants angle equal to 90 ° features; these are flat two packages can not compete with.

The negative side of the contact line was less than positive side, however, constitute a positive and negative side of the worm crown as a whole, the positive side of its carrying capacity, limiting the expansion of the negative side of the negative side wear worn; therefore, its carrying capacity should be a comprehensive reflection of the positive and negative side meshing performance. In short, the biggest advantage of a two-node dual side-mounted cylindrical worm gear Worm that: it can be used in the project conventional techniques, carried out series of standards for the transmission structure design and development, for the development of the worm drive provides a vast world; for the product update replacement provides a new technical support.