Metal cutting

[sathish]

can anyone tell why the sharp cutting edge gives good surface finish?

[RWOLFEJR]

Hello Sathish and welcome to the forum,

The answer to your question is loaded with ifs and buts... and I suspect the is a homework question? There's a LOT more to attaining a smooth surface finish than just the cutting edge.

But think about it for a minute. If you spin a part up in a lathe and machine it with a brick... then spin another part up and machine it with a smoooooth cutting edge... which do you think will be more likely to have a nice finish?

[PinkertonD]

Depends on the grain-size of the brick material! If it was an Arkansas Stone brick, I am going for it.

Sorry, sometimes, can't help myself.