| Author | Message | ||
     Glenn Middleton Rating: N/A |
It appears that the old Leitz screws are to the standards used by the optical industry of the time.They do not follow engineering standards.This is why the Leica lens thread is 39mm x 26tpi and not 39mm x 1mm.These optical standards were fairly universal,but as you have found not used now for screw head dimensions. Simplest way of obtaining replacements, is to modify the head of a suitable modern screw.Turning up replacements is a real pain;so using watch makers lathe I reshape the heads,using small diamond wheel toolpost grinder.If you use a stainless screw,a fine 'grit'blast leaves a finish akin to matt chrome. Find your local Model Engineering Society,somebody there will be able to help. |