What is the difference between a double lead worm gearbox and a normal worm gearbox?
The difference between a double-lead worm gear reducer and a regular worm gear reducer is that the left and right sides of the teeth in a double-lead worm gear have different leads, while the leads on the same side are equal. Therefore, the tooth thickness of the worm gradually increases or decreases uniformly from one end to the other. Thus, a double-lead worm gear is also called a variable tooth thickness worm gear, and the meshing backlash between the worm gear pair can be eliminated or adjusted by axially moving the worm. The meshing principle of a double-lead worm gear pair is the same as that of a regular worm gear pair; the worm's axial section is still equivalent to a basic rack, and the worm wheel is equivalent to the gear meshing with it. Because the left and right sides of the worm teeth have different tooth pitches, i.e., the left and right sides of the teeth have different modules, but because the tooth pitch on the same side is the same, the meshing conditions are not disrupted, and good meshing can be guaranteed even after axially moving the worm. Double-lead worm gear pairs are widely used in CNC machine tools with rotary feed motion or indexing motion, and have many outstanding advantages…