High marks for advice! Wondering how the needle was made?

How are the needles made? The finish is still so high, so fine, hardness is still so good! To the tip of the needle or standard gradient arc, the needle end and a few millimeters less than the needle eye, the needle eye is also done so smooth! Really very curious, we discuss how to make it?

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This topic has been discussed for a long time

Let me summarize it

It seems that the needle's process is roughly already out

Wire straightening-undercutting-punching-pressing the nose-punching the word and the groove of the line-punching and trimming the excess part-sharpening (in several parts)

The needle's eyelet is also smooth. The wire is straightened - the material is cut - the nose is punched - the lettering and grooves are punched - the excess is removed by punching - the tip is sharpened (in several passes) - it is deburred - it is sharpened - it is polished - it is inspected and packaged;

But there are still a few more questions that I need to ask, and I would like to ask you all to look into them. Is there anything else specific that can be communicated?

How do you clamp it when grinding and polishing, do you need a jig?

And how does the hardness of the needles come out? Is it just hardened by cold work, without a specialized heat treatment process?

The tip is so thin and strong, it must have been treated very well.

Is the surface plated, and what is it if it is?

Is the nostril punch not the same size if the punch was ground by the worker himself? How is the burr finish of the nostrils handled?