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Crane dedicated gear corrected in order to avoid what happened next on the machine while cutting the number of teeth of the gear cutting phenomenon be increased by changing the shape of the tooth profile and tooth strength method.
In fact, the minimum number of teeth cranes special gear can also be smaller, because at this time the resulting small cut on the strength of the tooth will not have a significant impact.
In fact, it can be considered: For 20 degrees involute tooth profile, when the pinion with standard tooth height of the pinion gear, the next cut will occur in pinion number of teeth is less than 14, and when the pinion has a short tooth, occurs in number of teeth of the pinion is less than 11.
In the gantry crane manufacturer, the main use of zero displacement correction, this correction method that is closer to the cutting tool to be cut or removed centerline gear. The main advantage of this method is that it can use standard cutting tool cutting non-corrected gear used. Meanwhile Gantry axis distance remains unchanged.
In the zero displacement correction, the pinion gear cutting tools for the amount of movement in absolute value equal to the amount of movement of the gear cutting tools. Meanwhile, the dedicated crane gear blank diameter than the diameter of a non-blank correction pinion is large, and the diameter of the gear blank is correspondingly reduced. Root diameter of the circle is exactly the same to be changed accordingly, ie root diameter pinion increases, while the root diameter cranes special gear reduction.

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