Large flashlight threads

Flashlight Modding and DIY Parts
1

Hello,

I want to create some CNC machined flashlight parts and am looking for advice on how to thread them. I do not own a CNC mill turn so I have to make drawings myself. I have only been exposed to metric threads like M3~M14. Nothing large like those 30~60mm diameter flashlight threads.

For example. I have a ~50mm tube “HEAD attach to BATTERY” or “HEAD attach to LENS CAP” and want to specify my thread, what is the best format or style I should be looking at?

Thank you!

2

maybe water pipe die set would be big enough ?

3

1.5mm pitch is an electrical conduit pitch and the outside diameter is the size of the thread. So a 50mm outside diameter would be
M50 x 1.5mm pitch

4

Talk to your machinist and get his opinion to help work it out. It might be that he has tooling for different thread profiles.

Here is 1.5mm trapezoid threads on a Fenix light that is less than 49mm diameter

Here is 0.8mm triangular threads on an SRK bezel over 55mm diameter