Electric Dental Handpiece Increasing Contra Angle 1:5

What is a 1:5 Increasing Contra Angle Handpiece?

It is a low-speed, high-torque attachment that connects to a dental low-speed micromotor. Its primary purpose is to provide the significant rotational force (torque) needed for demanding procedures like implantology and endodontics (root canals), while offering brilliant illumination via built-in fiber optics.

Key Feature: The 1:5 Increasing Gear Ratio

This is the most important characteristic. The gear ratio "1:5" means:

• For every 1 full rotation the micromotor makes, the bur (the drill bit) in the contra angle makes only 1/5 of a rotation.

• Result: This reduces the speed but dramatically increases the torque (twisting force).

Analogy: Think of the gears on a bicycle. When you shift into a low gear to pedal up a steep hill, you pedal more slowly but with much more power. The 1:5 contra angle is the "low gear" of dental handpieces. It trades speed for immense power, preventing the bur from stalling when pressing against hard materials like bone or dense tooth structure.