Hot twisting metal bar - GIF

[ToolTalkBot]

Hot twisting metal bar.




Previously:

Cable twisting machine - GIF
Copper cable twisting machine - GIF
Heated forced twisting - GIF
Pretzel twisting machine - GIF
Red hot picket twisting - GIF

[hemmjo]

Curious why you would do that. Just decorative, or some other reason?

[BuffaloJohn]

Curious why you would do that. Just decorative, or some other reason?

large diameter screw threads?

[hemmjo]

If so that would be a 4 start left hand thread with inconsistent pitch and pipe wrench gashes in the thread peaks.

I am glad I don’t have to machine the nut that fits it.

I have seen that done with square stock on decorative iron work. The video looked pretty good the first turn to. But after that it lost any of the “good look” it started with.

[Philip Davies]

It is either merely a demonstration, or, possibly, for forging out and etching, which might show some striations, but for good effect you would want to two contrasting iron alloys. This is sometimes what knife makers do. After 2 revolutions on that short piece, it becomes aesthetically unpleasant, in my view.