Question

In turning operation feed is doubled to increase the metal removal rate,to keep the nose radius should be whathe same level pf surface finish, the nose radius of the tool should be

Answer 1

Turning actually forms a helical groove on the part – a thread. The depth of the groove is the roughness height. The roughness height (Rmax) is directly proportional to the square of the feed rate, and inversely proportional to the nose radius of the tool. This equation gives you a rough Ra value (the exact value is of course only got by actual measurement of the surface).