TESTING MACHINES

BEVEL gear users must know how their gears will operate in their final mountings. Smooth, quiet-running bevel gears must have correct tooth shapes, uniform spacing of the teeth, and teeth concentric with the bore or shank. Since the most conclusive test of bevel gears is their operation under normal running conditions in their final mountings, Gleason testing machines (Illustration No. 17) are designed to provide a running test of the gears simulating these conditions.

Illustration No. 17

These machines provide a practical method for determining that the gears are right before assembly, and for controlling precisely the quality of the gears during all the stages of their manufacture. The smoothness and quietness of operation, the tooth bearing, the tooth size, the surface finish, and appreciable run-out and tooth spacing errors are all checked by the running test.