Graflex lens board and Ektar assembly

[eng1er]

I've got an Ektar 127mm f/4.7 (supermatic shutter) on a graflex lensboard and I want to take it off to do some work on the shutter. Unfortunately, I can't find any info on how to remove the shutter from the board. After removing the front and rear lens groups, I remove the three screws from the flange on the back of the board, but nothing wants to budge and I can't tell how the flange is connected to the shutter. Can someone enlighten me?

[Andrew Moxom]

The flange should unscrew as it is a simple thread holding it. Try unscrewing the shutter as it's a larger diameter, it should have more leverage. I freed mine up like that. I did not have to clamp, or hold the flange at all as the 3 screws were not used, but the flange is the same as yours. Try screwing in the 3 screws again and then try unscrewing the shutter itself. Maybe use one of those neoprene lid gripping mats from target used for taking off tight jam jar lids etc. Grip the shutter with it and unscrew anticlockwise. Then continue to remove the shutter leaving the flange in there with the screws attached.

[eng1er]

Figured it out: someone had tapped the back side of the shutter body and threaded in a pin which sat in a hole on the lens board thus preventing the shutter body from turning in relation to the board. So I had to remove the screws holding the flange to the board and use a spanner to awkwardly (since the screw holes are laid out triangularly) unscrew the flange.

[Jim Jones]

The threaded pin on the back of the lens was probably factory installed. This was to keep the lens from accidently rotating on the board. It won't hurt to disgard the pin if you want.

[eng1er]

Possibly, but it doesn't look like a factory job. Anybody got a supermatic shutter that can confirm whether or not the pin is original. In any case, I took it off because it made it impossible to thread the shutter all the way into the flange (there was some play if it stopped where the pin/hole aligned). Kept it though, in case it is original it can go with the lens.