MBfreak
MEMBER EMERITUS
I used to do some miniature repairs to mechanical precision instruments.
All was old ( 1930´s) Had a lot of use of the these:
The broaches are swiss watchmaker quality. They angle between the 5 cutting edges are non equal so that the hole stays round. Incredible quality, used a lot and never ever sharpened, which I have NO idea how it can be done.
Ola
All was old ( 1930´s) Had a lot of use of the these:
The broaches are swiss watchmaker quality. They angle between the 5 cutting edges are non equal so that the hole stays round. Incredible quality, used a lot and never ever sharpened, which I have NO idea how it can be done.
Ola
