Worm gears resemble screws. A worm gear is usually meshed with a spur gear or a helical gear, which is called the gear, wheel, or worm wheel.Worm-and-gear sets are a simple and compact way to achieve a high torque, low speed gear ratio. For example, helical gears are normally limited to gear ratios
The McCullock Technique for collecting fishing worms: Drive a 3-foot stake 6-8 inches deep into the ground. Remove or disengage the chain from a chain saw. Rest the bottom of the running chainsaw on top of the stake. The worms will be coaxed from the soil by the vibration.