Worm Wheel 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. Worm Wheel Gears are quite in operation. Using a single-lead worm along with a 100 tooth wheel can do wonders in a single simple step.