Worm gears are the perfect choice when the need is for producing large motor speed Gear reductions in a single step. A single reduction range of 5:1 – 100:1 is considered quite a normal thing for Worm Gears. It can climb up to 127:1 or even more, under special circumstances.
Single-Throated Worm Gear:
In the Single-throated worm gears one element that is generally thedriven gear, is throated. Tooth contact takes place in a single moving point on a worm drive. It has has concave helical teeth wrap around the worm. This leads to line contact.