Which of the following process is used for super finishing of bores in ferrous metals?

Concept:

Drilling 

• It is the production of cylindrical holes of definite diameters in workpieces by using a multi-point cutting tool called a ‘drill’. It is the first operation done internally for any further operation.

Honing 

• It is a superfinishing process carried out using abrasive sticks for the removal of stock from metallic and non-metallic surfaces. This process produces a high surface finish, corrects the profiles of cylindrical surfaces, and removes taper.

Grinding 

• It is a metal cutting operation performed by means of a rotating abrasive tool, called a “grinding wheel”. Grinding is the most common form of abrasive machining. It is a material cutting process that engages an abrasive tool whose cutting elements are grains of abrasive material known as grit. 

Filing

• It is one of the methods of removing small amounts of material from the surface of a metal part. A file is a hardened steel tool, having slant parallel rows of cutting edges or teeth on its surfaces

Lapping 

• It is a precision finishing operation carried out using fine abrasive materials. This process improves geometrical accuracy, refines surface finish, and assists in achieving a high degree of dimensional accuracy.