Anglepoise
Flashlight Enthusiast
John,
Excellent advise ^^^^. I would only add a couple of comments on design that might help.
It is important to decide right away if the light design will be 'stand alone' or if you will be mixing and matching components from another maker.
The Aleph system would be an example of the later.
Now a designer building a custom, might decide to use 24 or 32 TPI for convenience. Both these TPI's are a multiple of most American lead screws so it simplifies threading.
However it would be no use if the battery tube ( example ) was required to mate with another light with 20 TPI treads. The outside diameters can be the same in both instances, but they will not thread together.
As was mentioned above, there are different classes of fit and if a custom light must mate with something else,then send the example of the 'something else' to the machinist so everything fits.
Excellent advise ^^^^. I would only add a couple of comments on design that might help.
It is important to decide right away if the light design will be 'stand alone' or if you will be mixing and matching components from another maker.
The Aleph system would be an example of the later.
Now a designer building a custom, might decide to use 24 or 32 TPI for convenience. Both these TPI's are a multiple of most American lead screws so it simplifies threading.
However it would be no use if the battery tube ( example ) was required to mate with another light with 20 TPI treads. The outside diameters can be the same in both instances, but they will not thread together.
As was mentioned above, there are different classes of fit and if a custom light must mate with something else,then send the example of the 'something else' to the machinist so everything fits.
oo:, so matching threading with another light isn't important - I just want to better understand how different-sized threading affects the feel of turning a head or tail in your hand.
