Gear Type Figure Geometric Power Key Points in Force Description Engineering Between: Design Spur Gears Teeth parallel to Parallel shafts Most common type, Radial, cylinder axis moderate to low speeds tangential, no axial force Helical Gears Teeth that follow Parallel and Quieter operation Radial, axial on helical paths on nonparallel because teeth load and the cylinder nonintersecting gradually and more teeth tangential shafts in contact, higher speeds, higher loads Herringbone Gears Internal Gears Bevel Gears Spiral Bevel Gears Miter Gears Hypoid Gears Worm + Worm A worm is a screw Gear meshing with a spur-like gear called the worm gear
Gear Type Figure Geometric Description Power Between: Key Points in Engineering Design Force Spur Gears Teeth parallel to cylinder axis Parallel shafts Most common type, moderate to low speeds Radial, tangential, no axial force Helical Gears Teeth that follow on helical paths on the cylinder Parallel and nonparallel nonintersecting shafts Quieter operation because teeth load gradually and more teeth in contact, higher speeds, higher loads Radial, axial and tangential Herringbone Gears Internal Gears Bevel Gears Spiral Bevel Gears Miter Gears Hypoid Gears Worm + Worm Gear A worm is a screw meshing with a spur-like gear called the worm gear