Spur Gear. Gears having cylindrical pitch surfaces are called cylindrical gears. Helical Gear. Helical gears are used with parallel shafts similar to spur gears and are cylindrical gears with winding tooth lines. Spiral Bevel Gear. The Different Types of Gears · Functions of a Gearbox · Spur Gear · Helical Gear · Double Helical Gear · Herringbone Gear · Bevel Gear · Worm Gear · Hypoid Gear. Gear Types and Terminology is a page to learn types of gears and gear related in table is the theoretical efficiency range of various gear types. Some of the types of gears which employ parallel configurations include spur gears, helical gears, internal gears, and some variants of rack and pinion gears. A gear may also be known informally as a cog. Geared devices can change the speed, torque, and direction of a power source. Gears of different sizes produce a. Different types of gears have different applications. For Example, spur gears are used to transfer motion between parallel shafts. Whereas Rack and Pinion gears. Different Types of Gears and Their Uses · Spur Gear · Gear Rack · Internal Gear · Helical Gear · Double. Different Types of Gears · Spur Gear · Helical Gear · Bevel Gear · Screw Gear · Worm Gear · Rack and Pinion Gear · Hypoid Gear.