This gears is opposite to external gear, provide a compact parallel shaft transmission drive with large speed reduction. These type of gears are used with a stock spur pinion type with same ratio of external type. This transmission product may be operated with the gear in a fixed position and the pinion rotating along the pitch line, or the gear may be free to rotate with the pinion rotating in a fixed position.

This gears is opposite to external gear, provide a compact parallel shaft transmission drive with large speed reduction. These type of gears are used with a stock spur pinion type with same ratio of external type. This transmission product may be operated with the gear in a fixed position and the pinion rotating along the pitch line, or the gear may be free to rotate with the pinion rotating in a fixed position.