Alphax #5 Flange

[Drew Bedo]

Hi all,

I need a mounting flange or ring for an Alphax #5 (Betax #5). Its a .1"/30 TPI thread. SK Grimes will make one for a lot of money. I am willing to barter a couple of rings and flanges that I have, plus $20 (SKG won't do that . . OK, I understand).

Any help?

[Drew Bedo]

Still looking —any help?

[Leigh]

Its a .1"/30 TPI thread.

Sorry, Drew, but that's not a standard thread definition.

A 0.1" thread pitch would be 10 Turns Per Inch (TPI).

A 30 TPI thread would be 0.0333" pitch.

Is this an American shutter or metric?

- Leigh

[Drew Bedo]

Thanks Leigh.

As near as I can correctly atate what I need is: 3" ID with 30tpi threads.

I have one of the Wollensak/Graflex 15" Tele-Raptars in an Alphax #5 shutter.

I need a flange or ring to mount the shutter and lens on a board.

I have a few flanges that are either too big or too small and I am willing to do a trade. I'll add some cash too if necessary. SK Grimes is the last resort but want ver $100 —which is probably fair for a custom piece.

[pasiasty]

You may try mounting like that:


There a piece of plastic hose (about 12mm - 1/2" diameter) around the barrel and a steel band clip around. Rather 'a duct tape & WD40' solution, but it works.

[Drew Bedo]

Thanks! Looks workable.

How the world has changed though . . .it used to be "..with chewing gum and baling wire."

[Liquid Artist]

Several years ago I had heard that Loctite had a product designed to actually make threads jn objects. I am thinking it may work if you have a flange or something a little larger. You would want to follow the directions to the letter, or it may be tough taking the lens off after it's cured.

[Ari]

I have been told, a few times, that a hot glue application will hold the shutter to a board very well, and is very easy to remove as well.

[Leigh]

I have been told, a few times, that a hot glue application will hold the shutter to a board very well, and is very easy to remove as well.

You just contradicted yourself.

If it's easy to remove when wanted, it's also easily removed by external forces when you don't want to.

Hot-melt glue has no adhesive strength, certainly not adequate for a lens/shutter of any size.

=====

Mating threads in metal are the only way to accomplish a secure mount.

Remember a basic law of economics and business...
Threaded attachments are relatively expensive, particularly fine-pitch large diameter ones.
If a suitable lower-cost alternative existed, it would have been offered in the market decades ago.

- Leigh

[Ari]

Ok, maybe it wasn't clear.
The glue, when set, holds the shutter quite firmly.
Should it need to be removed, a utility knife will make short work of the glue.
Not as permanent or destructive as drilling holes in the lens board to accommodate screws, and a good solution when one is needed in a pinch, or in this case, when a flange is hard to find.