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Bronica C Helicoid Re-assembly

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MTLMan

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Joined
Jun 13, 2026
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Location
Montreal
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35mm
Hello all,

I recently bought a Bronica C2 on the cheap. The old owner cross threaded the helicoid, but I managed to fix the threads and it goes in now. However, I’m having trouble putting the helicoid back together.

The keyed ring on the lens mount (the part that actually locks the lens) won’t go into the bottom helicoid, as there is a keyed piece of metal. As I didn’t take the lens apart, I have no idea how to reverse this. Does anyone have any help?
 
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