Tjabo Posted June 3, 2007 Report Share Posted June 3, 2007 I know it's a hack thing to do, but I like this watch a LOT other than the extremely noisy rotor. It's so loud sometimes when I move my arm that people look at me like "What was that?" When I tell them it was my watch, they think it's REALLY strange! Anyway, here is a picture of the rotor (Asian 21j I believe) so you can see what bearing I'm talking about: I'm thinking of putting some automotive grease in a syringe and trying to apply a miniscule amount right into the bearing race area. . . . Anyone? Thanks in advance as usual! Quote Link to comment Share on other sites More sharing options...
FxrAndy Posted June 3, 2007 Report Share Posted June 3, 2007 I think there was a post about this a while ago, the author said it worked for him but cant remember what the experts said about it. I think that most of the noise on the 7750 rotor is when is spins in the non winding direction (very freely) and the grease may deaden the sound and slow the spin in that direction but may also:- a, More force may be required to wind the watch by the rotor as the automotive grease would provide more resistance than the thin watch making oils that are used. b, May pollute other areas of the works that do not need the grease. c, i have heard that gen swiss, chiss or swinese 7750s also have loud rotors any way. I hope this helps, have a good search and see if you can find the original thread. Quote Link to comment Share on other sites More sharing options...
Tjabo Posted June 4, 2007 Author Report Share Posted June 4, 2007 Thanks Andy! I spent quite a while last night searching for this information, and I found NOTHING! I thought it got quite a bit of discussion, so I'm starting to think I am losing my mind. . . Coincidently, an opinion shared by my wife. . . . Quote Link to comment Share on other sites More sharing options...
Tjabo Posted June 4, 2007 Author Report Share Posted June 4, 2007 Hmmm. . . . Where can some of this special oil be obtained? Quote Link to comment Share on other sites More sharing options...
scoobs1971 Posted June 4, 2007 Report Share Posted June 4, 2007 5 months ago I put a tiny bit of ball bearing grease on the A7750 rotor. The annoying noise was immediately gone. Only a nice 'purring' sound when I hold my wrist to my ear. Just opened the caseback and as far as I can see it hasn't leaked into the other parts (it onlt melts above 110 dgrs Celcius) , neither is the rotor slowed down. Watch keeps perfect time so far. HOWEVER, when you ask The Zigmeister he'll tell you NOT to do this. So I'll have to see what this means for my watch in the long term...... I also have a gen Oris watch with Valjoux 7750. It does make some hearable noise, but a pleasant one and not even close to the grinding sound as some A7750 have. Quote Link to comment Share on other sites More sharing options...
Tjabo Posted June 4, 2007 Author Report Share Posted June 4, 2007 Thanks guys! Quote Link to comment Share on other sites More sharing options...
kasigi Posted June 4, 2007 Report Share Posted June 4, 2007 The previous thread on this is here Quote Link to comment Share on other sites More sharing options...
FxrAndy Posted June 4, 2007 Report Share Posted June 4, 2007 Thanks Andy! I spent quite a while last night searching for this information, and I found NOTHING! I thought it got quite a bit of discussion, so I'm starting to think I am losing my mind. . . Coincidently, an opinion shared by my wife. . . . It happens to us all Quote Link to comment Share on other sites More sharing options...
FxrAndy Posted June 4, 2007 Report Share Posted June 4, 2007 I have some nice thick blue harley wheel bearing grease, shouild i try that Quote Link to comment Share on other sites More sharing options...
sssurfer Posted June 5, 2007 Report Share Posted June 5, 2007 And what about vaseline? K-Y jelly? Butter? Quote Link to comment Share on other sites More sharing options...
Pugwash Posted June 5, 2007 Report Share Posted June 5, 2007 The previous thread on this is here...and the important post is this: Well all I can add is that the ETA tech sheets all call for a small very small amount of Moebus 9010 on all rotor bearings... Quote Link to comment Share on other sites More sharing options...
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