THE WORK OF THE MACHINES
Fig. 60.—Milling the Inside Faces of Universal Yokes with two Inserted Tooth Cutters
plate, a sector, change gears, and a swivel table. By these additions a rotary
movement can be given to the work while the table is being fed at any angle.
Any gear-cutting, specially that of spirals, and the teeth of cutters, can be
produced thus. These machines are marked by increased strength and
stiffness of late years, and speeds and feeds are very commonly being imparted
through boxes of gears. In Fig. 58 will be found an illustration of a