The method of how the picture gear has developed similar to the clutch in gear, in which the teeth are created by the rolling of cylindrical gear split under split plane of rack, while in gear, the teeth are created by the rolling of the split taper gears according to the flat surface of the cake split flattening. The cake was born as flat briquettes with taper angle the top of the taper divided by 180°.Prôfin teeth are created by the rolling of the tool and gear machining. The tool is a knife or two have blade shapes. Tools made the motion to go back in the direction of split taper gears.
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