Mechanical Engineering - Workshop Technology - Discussion

The correct answer is B because there will be no chip formation. Hence, while doing thread rolling it generates the major as well as minor diameter of the thread.

Which one is the right answer?

The blank diameter of a rolled thread is at the pitch diameter, a theoretical point between the major diameter and minor diameter. So, the correct answer is B.

Which is correct answer?

Which is the right answer?

The Correct answer is D.

Thread rolling is used to produce threads in substantial quantities. This is a cold-forming process.

Operation in which the threads are formed by rolling a thread blank between hardened dies that cause.

The metal to flow radially into the desired shape. Because no metal is removed in the form of chips, less.

Material is required, resulting in substantial savings. In addition, because of cold working, the threads.

Have greater strength than cut threads, and a smoother, harder, and more wear-resistant surface is obtained.

One obvious characteristic of a rolled thread is that its major diameter always is greater than the diameter of the blank. When an accurate class of fit is desired, the diameter of the blank is made about 0.002 inch larger than the thread pitch diameter. If it is desired to have the body of a bolt larger than the outside diameter of the rolled thread, the blank for the thread is made smaller than the body.

Option d is correct. You can imagine gear nominal dia greter than pitch diameter (imagination dia).

B is correct.

The blank diameter is in between major and minor dia.

I think Option D is correct because the pitch diameter lies in between minor and major diameter.

Option B is the correct answer.