Canon F-1 New - rewind issues

Hi there

 

I have an F1-N that is having issues rewinding film. When you start to rewind it feels like it is locking up? I think it is because the rewind shaft claw? is broken. See attached image. Would this be why? All other parts in the rewind chain seem to run smoothly...

 

I cant find anyone local to repair and its not worth sending it away.

 

My question is does this part 'unscrew' and if I found a spare/replacement could I just screw the new one back on.

 

I saw this on eBay and thats what made me think this could be a solution?

(https://www.ebay.com.au/itm/113124407161?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649)

 

Thanks for any advice.

 

Julio

 

That's the last one on eBay there so be quick to get it

 

It looks to be the same as yours, you'll only need to use the folk part. Your folk will screw off counter clockwise, you'll need to grip it with multigrips and turn the rewind handle

I am afraid the part pictured won't fit your camera. The New F-1 rewind shaft has the grooves at positions different from the "old" F-1 shaft. The "old" F-1 rewind shaft fork has a larger diameter than the New F-1 so it would likely not retract fully.

I am afraid the part pictured won't fit your camera. The New F-1 rewind shaft has the grooves at positions different from the "old" F-1 shaft. The "old" F-1 rewind shaft fork has a larger diameter than the New F-1 so it would likely not retract fully.

 

I don't think the shaft is a concern.

 

Provided the thread is the same in the eBay fork as the thread on the original shaft, the OP will be half way there. If the outside diameter of the new fork is too large and it won't retract into the camera, the fork can be linished down to the size of the original fork, all except the flanges on the end. Desperate measure but it could be done neatly taking care not to overdo it but just enough for it to retract without getting stuck in the camera. Nothing would need to be done to the groove in the fork, they are pretty much identical dimensions in all forks for 35mm cassette film spools

With both, the "old" F-1 and New F-1 the rewind shaft and the fork are one piece. I don't think the fork can be replaced separately

 

New F-1 shown on the left, "old" F-1 on the right.

 

 

Looking at both shafts (New F-1 top, "old" F-1 bottom) I doubt that the shaft from the ebay offering is from an F-1 at all. The seller is known to be one to be avoided.

 

Thanks for all the posts - I quickly order the part after the first posters suggestion! So that was a mistake!!!. In lieu of finding a second hand shaft I will have to retire the old girl...

 

Unless anyone has any other suggestions...

 

Thanks

.......Unless anyone has any other suggestions...

 

Find a parts camera, and take the rewind off that.

Unless anyone has any other suggestions...

 

Getting one machined or 3D-printed.

3-D print is a good idea... Would it be strong enough?

 

Is it 'relatively' simple to swap out? I have been looking for a service manual but cant find one that show how to dis-assemble this section.

 

Thanks for the advice

3-D print is a good idea... Would it be strong enough?

 

I have no experience with that but sturdiness would also be my concern. I would maybe consider reinforcing the fork part at the cost of it going less easy into the film spool. It may also turn out difficult making the rather fine thread at the top of the shaft. My personal preference would be machining it.

 

Large scale model builders may have experience making parts of this size.

 

Is it 'relatively' simple to swap out? I have been looking for a service manual but cant find one that show how to dis-assemble this section.

 

Unfortunately it's not as simple as with many other cameras. The click-stop spring will lock the shaft when pushing it down and the left top cover will have to be taken off in order to release it.

1. Remove the pin face screw sitting under the rewind crank. (Hold the shaft, don't hold the rewind knob!)
   
2. When taking off the rewind knob be careful not to loose the small spring, pin and washer underneath it.
   
3. Remove the flash socket. It screws out. Best is to use a 10mm flexi-clamp type wrench.
   
4. Remove the front cover (four screws).
   
5. Remove the left top cover (two screws). Push the rewind knob release button while pulling the cover.
   
6. Looking from the rear of the camera, carefully bend down the right-hand side capacitor at the bottom of the PCB a bit.
   
7. With some sharp-ended tool reach into the camera from behind (between PCB and capacitor) and push the click-stop spring (located at the right-hand side of the shaft holder) towards the viewfinder. This will release the shaft.