Machening If grinding a piece of hardened A2 steel and a fin

Machening

If grinding a piece of hardened A2 steel and a finish of 4-6 microinches is required, which wheel would be best? a. A120 K b. C46 G c. C60 I d. C100 I What are the cutting conditions for finish turning? A series of 5mm holes are to be drilled in a glass work piece. Select a suitable machining method. What are the variables that affect the final hold quality? Compare wire EDM and Post (sinker) EDM. Write these values as fractions: .1, .01, .001 and give an example of what they represent to you.

Solution

16. a) A120K is best, as it has higher grit size 120 which is good for 4-6 microinches surface finish and C type is generally used for rough grinding operations