bonefish
Member
I made some bushings one time, to fit the 7 m/m mandrel.
I drilled a hole in the steel rod, I don't remember the size, for a 7 m/m tube to go through. I then soldered the tube inside the roughed out bushing.
Next, I mounted the bushing between centers, much the same way Dario described turning the pen body between centers.
Turning between centers insures that the tube and hole are in the exact center of the bushing.
I then turned the outside of the bushing to the correct size. It works, if you want to go to the trouble. You could also do the same thing with an 8 m/m rod.
Bonefish
I drilled a hole in the steel rod, I don't remember the size, for a 7 m/m tube to go through. I then soldered the tube inside the roughed out bushing.
Next, I mounted the bushing between centers, much the same way Dario described turning the pen body between centers.
Turning between centers insures that the tube and hole are in the exact center of the bushing.
I then turned the outside of the bushing to the correct size. It works, if you want to go to the trouble. You could also do the same thing with an 8 m/m rod.
Bonefish