Hand-carved metal roll dies - photos

Hand-carved metalworking roll dies from the 1930s.

Fullsize image: https://s3-us-west-1.amazonaws.com/h...s_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h..._roll_dies.jpg

Fullsize image: https://s3-us-west-1.amazonaws.com/h...1_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...roll_dies1.jpg

Fullsize image: https://s3-us-west-1.amazonaws.com/h...2_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...roll_dies2.jpg


Previously:

https://www.homemadetools.net/forum/...622#post178217
https://www.homemadetools.net/forum/...1533#post94051
https://www.homemadetools.net/forum/...903#post171504
https://www.homemadetools.net/forum/...161#post141528
https://www.homemadetools.net/forum/...534#post177977

There would be a lot of mathematics involved in working out the number of repetitions per revolution and vice versa and then a high level of skill required in graving, heat treating and cleaning up. Make the days go fast for sure.

Probably drawn out on paper then cut to determine the diameter of the blank...