Rotor Issue

[Lawren5]

I'm working on a Seiko 7625 movement in which the rotor rubs against the three center screws of the self-winding assembly. The marks from the screws can be seen on the rotor.

What is the best way to resolve this?  I've thought about placing a thin washer between the rotor and self-winding assembly or filing down the screw heads but not sure which is the correct approach.

[anilv]

The reason it rubs is because there is wear in the bearing. Proper repair is to replace the bearing. Sorry no leads on where to source a bearing. I think I did cannibalize one from an Orient but that was a few years ago.

Good luck

Anilv

p.s. Even if you do file down the heads of the screw My guess is that the rotor will then hit the edge of the automatic device bridge.

 

Edited June 5, 2020 by anilv

[muhammadsarimkashif]

Yeah pretty much this is related to the bearing. You could ask any watchmaker who services automatics and he should pretty much have one.

[Nucejoe]

Reduce the distance between the two Disks that center arbour are mounted on.  

Use a staking punch or a metal tube with ID larger than center arbour OD. tap on disks to push em closer together, thereby taking the slack out. 

Use of a thin washer like you say works too.

 

 

Edited June 5, 2020 by Nucejoe
use a dial washer.

[Nucejoe]

1 hour ago, Nucejoe said:

Reduce the distance between the two Disks that center arbour are mounted on.  

Use a staking punch or a metal tube with ID larger than center arbour OD. tap on disks to push em closer together, thereby taking the slack out. 

Use of a thin washer like you say works too.

 

 

Correction,   Reduce the distance between the two Discs mounted on the bearing arbour. 

 

[watchweasol]

Hi  Ithink the best way to fix this is either a new rotor complete or a new bearing  as the origional is worn and will continue to do so .

[jdm]

5 hours ago, watchweasol said:

Hi  Ithink the best way to fix this is either a new rotor complete or a new bearing  as the origional is worn and will continue to do so .

It will have to be a new rotor because the bearing only is not sold separately on this class of Seiko. It can be separated and put back but the success of that depends on the tools available and the skill of the person. 

[Lawren5]

Mark came out with a very timely video this morning in which he discusses whether it's worth repairing an early 70's Seiko 5. The watch shares a lot of similarity with the 7625 that I'm working on and like the Seiko 5 has lots of wear. I spoke to my customer about this and he's good with it. He just retired having worn the watch for most of his career. He doesn't plan to wear it in retirement but it does have sentimental value and he would like to have it operational. That being the case, I filed down the screw heads and the watch is working fine. I did not put a washer underneath the rotor as I had mentioned earlier as I was concerned that the additional height might interfere with the case back.

Thanks to everyone for your comments.