Through the design of unequal toothpitch, the detent torque can be effectively minimized for improved operation performance.
采用不等齿距的设计，减小二相电动机的定位转矩，提高其运行性能。
2
Some cars have variable-ratio steering, which uses a rack-and-pinion gear set that has a different toothpitch (number of teeth per inch) in the center than it has on the outside.
Typically, 60-tooth, 16 - pitch gears provide the optimum characteristics for RPM measurement, but other gear types can serve special application needs.