These problems can be solved by increasing the modification coefficient of small vertical cutting gear, increasing the number of gear teeth and restored the height of the bed saddle and so on.
A method of calculating and selecting modification coefficient of the internal gear with less teeth difference is presented.
Two methods are usually used to increase gearing backlash for counter trains:ease addendum modification coefficient,but remain center distancein constant.
The approach presented to achieve the modification coefficient and the minimum tooth number is applicable to the silent chain mechanism with all kinds of pitches.
