Screw Gear

What is Screw gear ?

Screw gears, also sometimes called crossed helical gears, are helical gears used in motion transmission between non-intersecting shafts. The helical gears used in parallel shafts have the same helix angle but in the opposite directions.

Where to use ?

Screw gear drives are used as the tuning mechanism for many musical instruments, including guitars, double-basses, mandolins,bouzoukis, and many banjos (although most high-end banjos use planetary gears or friction pegs). A screw gear drive tuning device is called a machine head.