Using the method described for Problems 7.20 to 7.24, cut a 1-tooth/in diametral pitch, 20◦ pressure angle full-depth involute rack tooth from a sheet of clear plastic. Use a nonstandard clearance of 0.35/P in order to obtain a stronger fillet. This template can be used to simulate the generating action of a hob.

Now, using the variable-center-distance system, generate an 11-tooth pinion to mesh with a 25-tooth gear without interference. Record the values found for center distance, pitch radii, pressure angle, gear blank diameters, cutter offset, and contact ratio.

Note that more than one satisfactory solution exists.