From all I know about Lowther drivers, everything is designed in English units. Without actually measuring the screw on the phase plug, my guess is that it is a 4-48 thread. Good luck in locating exactly two of these in brass, even in the USA. Living out in the sticks as I do, I'd probably wind up mail ordering a box of 100.
Bob
Bob
Lowther Phase Plug Threading
Ya know, you can learn too much about Lowthers if you really spend time at it. Like me.
The original thread for the phase plug was an old pre-SAE type standardized by English clock makers. Can't remember it's exact number, but almost impossible to find.
It happens to be the exact same size as 3.5m x .6. Since there are 2 different 3.5 mm threads (fine and coarse) you must also use the 2nd number.
Because of my work I have a tap and die, along with brass rod that is used to make non-magnetic phase plug threaded rods. And, 'cause I am a nice guy, you can have some for the asking. Just send me your mailing address. Would normally give away up to 6", let me know if you need more.
Jon Ver Halen
Lowther-America
Ya know, you can learn too much about Lowthers if you really spend time at it. Like me.
The original thread for the phase plug was an old pre-SAE type standardized by English clock makers. Can't remember it's exact number, but almost impossible to find.
It happens to be the exact same size as 3.5m x .6. Since there are 2 different 3.5 mm threads (fine and coarse) you must also use the 2nd number.
Because of my work I have a tap and die, along with brass rod that is used to make non-magnetic phase plug threaded rods. And, 'cause I am a nice guy, you can have some for the asking. Just send me your mailing address. Would normally give away up to 6", let me know if you need more.
Jon Ver Halen
Lowther-America
Thank you very much for your reply Jon!
Here`s my mail adress: lschrode@broadpark.no
Thanks in advance!
Lars Schroeder
Here`s my mail adress: lschrode@broadpark.no
Thanks in advance!
Lars Schroeder
Just to revive an (very ) old theme: I confirm that the 4-48 thread measure as mentioned here is a wrong one (just got a rare 4-48 die and it doesn't fit at all).
Still waiting for the M3,5 to try it on the different phase plug screws I own.
Cheers,