Sharpening the bolt M8x40
Seventh graders learn to work on a screw-cutting machine
1. Lesson sharpening the workpiece for the bolt M40x80
2. Lesson sharpening the workpiece for the nut M40x80
3. Lesson we cut the thread with a tap and a die manually.
4. We sharpen the kerner. This is cone turning.
5. Lesson we sharpen the workpiece under the tensioner for a locksmith hacksaw for grade 6 and cut the M6 thread on the machine.
Further ideas are in development.