Exact measurements for Jobo 2500 spools?

[MCB18]

Looking specifically for the core diameter and tank diameter as well

 

[koraks]

The OD of the core / center column is 24.5mm on mine. The reel is a snug fit onto this.
The tank itself has some ribs to hold in sheets if it's used that way (small clips slide onto those); the diameter inside those ribs is approx. 131.5mm with the ribs protruding ca. 1mm into the tank. I have a 2509N reel here which measures 128.5mm OD (outer rim). Its height is 105mm.
Note that the center column is raised off the bottom of the tank by about 22mm, so the inside of the reel is shorter overall than along the outer rim.

 

[MCB18]

Thanks!

I’m going to see if I can make a 70mmx15ft spiral fit inside one. I know the Chinese JOBO offers a 10 ft spiral for 2x 135-36/4x 120, so maybe I can squeeze 15 ft in there. Maybe I can eventually figure out how the center column works as well and make it adjustable to other sizes.

 

[koraks]

Great, I saw your post where you mention the resulting reel - looking good!

 

[john_s]

I have a 2500 series tank for inversion, so no ribs inside. Its internal diameter is about 133mm. The adjustable reel for 35 and 120 film is 128mm in diameter.