Chapter XXIV.—GEAR-CUTTING MACHINES.
Fig. 2071.
Fig. 2072.
The Brainard automatic gear cutter, [Figs. 2069], [2070], [2071] and [2072] is arranged to cut spur, bevel, and worm-wheels, and is of that class where the manipulations required in gear cutting are all performed by the machine itself, thus dispensing with the care of an attendant except to place the wheels in position and set the machine for the proper depth and length of cut. The manner in which these results are accomplished will be seen from the following description, reference being had to the engravings. The wheel to be cut (a, [Fig. 2070]) is held upon a mandrel b fitted to the spindle c, which is mounted in firm bearings upon a column or standard d. To the face of the standard is gibbed a sliding knee e. Upon this knee is placed the cutter slide f, which is arranged to be inclined for bevel-gear cutting, and to be swung aside in cutting worm-wheels. Rotary cutters are carried on arbors fitted to the cutting spindle (g, [Fig. 2071]). Power for driving the cutter is applied to the pulley h, mounted upon the cutter spindle.