Hobbing and Forming Operation

Hobbing

It is a procedure to generate gear. It is a machining operation, which is carried out by hob. Hob is used to generate tooth and other profiles such as helical gear, spline shaft, worm gear, spur gear (external) etc.

Forming and Parting Off

Forming operation involves the formation of complicated profile on the workpiece by using tool with the cutting edge of needed profile. It is carried out by form tool. Form tool is fed into the peripheral surface of the bar in a radial direction and categorized as a special purpose tool.