Unintended Gear Failures

At some point in your life, you had the opportunity to meet a set of twins. Maybe they were fraternal twins, or maybe they were identical twins. Fraternal twins are not usually obvious, but seeing two identical people is hard to miss. Some styles of gearing have twins. Miter gears are the closest gear pair to identical twins, since they have the same number of teeth, the same pitch, the same pressure angle, the same face width, and sometimes the same bore size. Regardless of style, a gear will always require another gear to transmit the torque desired.