... .PA20/14.5 3.Single or Double-Thread worm gear hobs 4.Right and left hand Worm wheel hob (Hole type ... ,precision,wearable We can supply all kinds of the Gear Hobs, especially we can do the Non-standard ones for u ... according to ur specific requirements. HSS worm gear hobs Accuracy: ClassAA, ClassA and ClassB ModulePitch Circle Dia.Working LengthOverall ...