After completion of one or two teeth, the blank and cutter stop feeding and the cutter is withdrawn and indexed back to its starting position, thus enabling a brief rack cutter of a practical duration to be utilized. Cutter is once again fed back to depth and cycle is repeated. Number of teeth is managed by the device gearing, and pitch and pressure position by the rack cutter. This method is utilized for generation of exterior spur gears, being preferably suited for cutting large, dual helical gears. For making helical tooth, the cutter slides are inclined at the apparatus tooth helix angle.
The hob is fed into the gear blank to the proper depth and both are rotated together as if in mesh. One’s teeth of the hob cut in to the function piece in successive order and each in a somewhat different placement. Each hob tooth cuts its profile depending on the form of cutter , but the accumulation of these directly cuts produces a curved form of the gear teeth, thus the name generating process. One rotation of the task completes the reducing upto certain depth upto which hob is fed unless the gear includes a wide face.

This methodis gear rack for Machine Tool Industry china specifically adopted to cutting large teeth which are difficult to cut by formed cutter, and also to cut bevel-gear teeth. It is not widely used at the moment.
In gear planing procedure, the cutter contains accurate involute rack which reciprocates across the face of the blank and the blank rotates in the correct relationship to the longitudinal movement of the cutter as if both roll collectively as a rack and pinion. At first the cutter is fed into complete tooth depth with cutter reciprocating and blank stationary. Involute form is generated as the blank rotates and involute rack cutter feeds longitudinally.

In the other technique, both roughening and completing cuts are taken with single pointed tools. The usage of the formed device for finishing is certainly impracticable for the bigger pitches which are finished by an individual pointed tool. The number of cuts required depends upon how big is the tooth, quantity of stock to be taken out, and the type of material.