Re: German screws / pencil sharpener
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Good question.? You may have to measure threads and diameters to determine what they are.? (Learning how to measure threads is a good idea anyway.)? And whether they are odd sizes (today) or not.? And if an odd size, what is closest. It isn't necessarily easy to make threads with a minilathe in all cases if you are talking about single point threading.? The change gears only support a fixed number of thread choices, and some odd thread pitch probably is not one of them.? Of course, if using a die, that doesn't matter.? But for an archaic thread size you might have trouble finding a die. And then there is the issue of the screw head.? That can be difficult to varying degrees depending on what type of screw head is required. You might try this Groups.IO group: Miniature-Machine-Tools /?Miniature Machine Tools and Tool Making.Topics on specialized replica engineering, fabrication and antique tool?restoration?are all fair game.Created:?10/27/19 Charles E. "Chuck" Kinzer
On Thursday, July 25, 2024 at 09:25:11 AM PDT, Johannes <johannes@...> wrote:
I have got a C1900 "Guhl & Harbeck , Hamburg" pencil sharpener for restoration . Jupiter 1
Some screws are missing, and before I force in some modern ISO screws;?
Had Germany their own screws size 100+ years ago??
I cannot find a " pencil sharpener IO group" , so I am asking you.
New screws can easy be made with a 7x12 lathe ?
Johannes
Mexico
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