After completion of 1 or two teeth, the blank and cutter stop feeding and the cutter is withdrawn and indexed back to its starting position, thus allowing a brief rack cutter of a practical duration to be utilized. Cutter is once again fed back again to depth and cycle is repeated. Amount of teeth is controlled by the machine gearing, and pitch and pressure angle by the rack cutter. This technique is used for generation of external spur gears, being preferably suited for cutting large, double helical gears. For producing helical teeth, the cutter slides tend at the apparatus tooth helix angle.
The hob is fed into the gear blank to the proper depth and both are rotated together as though in mesh. One’s teeth of the hob cut in to the function piece in successive purchase and each in a slightly different position. Each hob tooth cuts its profile based on the shape of cutter , but the accumulation of these directly cuts produces a curved type of the gear teeth, therefore the name generating procedure. One rotation of the task completes the reducing upto certain depth upto which hob is definitely fed unless the apparatus includes a wide face.

This methodis specially adopted to cutting large teeth which are hard to cut by formed cutter, and also to cut bevel-gear teeth. It is not widely used at present.
In gear planing procedure, the cutter includes accurate involute rack which reciprocates over the face of the blank and the blank rotates in the correct relationship to the longitudinal movement of the cutter as if both roll jointly as a rack and pinion. At first the cutter is definitely fed into complete tooth depth with cutter reciprocating and blank stationary. Involute form is produced as the blank rotates and involute rack cutter feeds longitudinally.

In the other method, both roughening and finishing cuts are taken with single pointed tools. The utilization of the formed device for finishing can be impracticable for the bigger pitches which are completed by a single pointed tool. The number of cuts gear rack for Machine Tool Industry required depends upon how big is the tooth, quantity of share to be removed, and the type of material.