Worm Gears
What Is Worm Gears？
A worm gear is a type of gear that is made up of a shaft with a spiral thread that engages and drives a toothed wheel. Worm gears are an ancient type of gear and one of the six basic machines. A worm gear is essentially a screw butted up against what seems to be a regular spur gear with slightly inclined and curved teeth.
It rotates the worm by 90 degrees, and the plane of movement shifts as a result of the worm’s position on the worm wheel (or simply “the wheel”). They are usually made up of a steel worm and a brass wheel.
Worm gears are often made by hobbing with a hob or cutting tool that is remarkably similar to the worm with which the gear mates. Turning, hobbing, milling, or grinding the worm are all options.
Features Of Worm Gears
- 90°, non-intersecting shaft applications answer highly specialized power transmission needs.
- Our worm gears offer the smoothest, quietest form of gearing.
- They provide high-ratio speed reduction in minimal spaces.
- Their efficiency is easily increased by lowering ratios.
- With some ratios, there is resistance to back driving.
- Available from 48 DP to 3 DP
- Stocked as single, double and quad start configurations
- Diameter from 15 to 300 mm, axial distances from 17 to 210 mm, module from 0.5 to 10, shaft length up to 500 mm
Type Of Worm Gears
Worm gears have the advantage of providing gear reduction and torque multiplication in a compact footprint. A worm gear is made up of a huge worm wheel with a shallow thread that is coupled to a perpendicular axis, non-intersecting gear.
The location and arrangement of the teeth is crucial for worm gears because the wheel gear and the worm gear require a very specific tooth design to define how the gears meet. Variations are caused by how the gears interact.
Worm gears are classified into two types: cylindrical or straight and cone or double enveloping. Worm gear faces are classified as straight, hobbed, or concave. The most common and commonly utilized worms are cylindrical worms.
Worm Gears Production Machine
The whirling method produces worms for gear worm reducers with excellent performance. This relatively new cutting procedure is actively replacing traditional processes like as hobbing or thread milling. Many advancements in production, including cutting tool materials and shape, machine tools, and induction hardening techniques, have allowed manufacturers to minimize the number of process stages by 60% or more. By spinning the worm to final tolerances and surface roughness before induction hardening, the worms are not only made faster, cheaper, and with fewer handlings, but also to greater tolerances than ever before.
This procedure eliminates the need for thread grinding entirely. Bearing journal cylindrical grinding can also be avoided by turning the soft blanks to completed tolerances and surface roughness before whirling the worm section. Because the journals may stay soft, no additional finishing processes are required. The induction heating technique of hardening and then quenching only the worm section distorts or stresses the material. The worm shaft does not need to be straightened, which removes even another manual task.
