richard

Tightening a "THINGAMAJIG"

Recommended Posts

Hi,

I'm tinkering with a movement from a Greville watch and the clutch/cannon pinion equivalent is very loose and hence the hands don't move, although the watch works OK. It's the type with a gear fixed to the mainspring barrel, not sure what it is called, but does anybody know if it's possible to tighten them up. 

Share this post


Link to post
Share on other sites
3 hours ago, richard said:

Thanks, photo added

What was asked is a picture of the mov.t, not of the part itself, which doesn't tell much.

Share this post


Link to post
Share on other sites

 I seem to remember servicing a watch movement with that style of barrel/wheel set up. If my memory is correct this set up requires a certain amount friction to drive the wheel. The mistake I made was to clean & then lubricate which reduced the friction required. I had to give it a light tap with a closing punch to give it back the friction required.

Share this post


Link to post
Share on other sites

No no, the OP has right. The clutch here is on the barrel. Its a Roskopf-type solution.

And Clockboy is also right, one can tighten it with a light tap to increase friction.

 

Edited by szbalogh

Share this post


Link to post
Share on other sites
5 minutes ago, szbalogh said:

No no, the OP has right. The clutch here is on the barrel. Its a Roskopf-type solution.

And Clockboy is also right, one can tighten it with a light tap to increase friction.

 

I must say it's just a poxy design.  

Share this post


Link to post
Share on other sites

Success, the light tap treatment has worked, infact I'm a bit worried it may be too tight. We'll see. I think just a bit of hard hand pressure, with the right stake, would have done the trick. Thanks everybody for your help and replies. Richard. 

Share this post


Link to post
Share on other sites

I had a similar problem with a 6497-2. I used a staking tool to give it a tap - actually a few taps. I was surprised how hard I actually hit it. But it works beautifully now.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing

    No registered users viewing this page.

  • Topics

  • Posts

    • Hmmm. We’ve all had that happen. The movement isn’t securely attached to the dial and when the movement moves outward at all, the dial pulls the hands off. You will have to remove the movement/dial once you get the stem out. Then you can reattach the hands.
      Look into that oblong hole to the right side of the stem in your photo. Watch inside it when you pull the stem in and out and you should see a tiny lever with a really tiny hole in it moving back and forth. There even may be an arrow on the movement pointing toward that hole. When you see the lever plainly and see the hole in it, put a toothpick tip or tiny screwdriver tip and apply a little pressure there. Then the stem should slip right out. That hole sometimes appears when the stem is pulled in the setting position, sometimes in the normal position. That’s why you have to pull the stem in and out to see when it appears. After you get everything out, you can fit the hands back in place, noting the proper position for their placement so they line up properly. Hour hand on an hour marker and minute hand at 12. Seconds should be at 12 when the minute hand is on a minute marker. At least you don’t have the added complication of a date. Good luck. Steve


      Sent from my iPad using Tapatalk Pro
    • I've been following this site for a while now, thank's for letting me join in.   Mele kalikimaka
    • Hi guys, First time watch repairer here. My Tokyobay watch shown in the photo below needed a new battery. So I got the new battery, popped open the back, and popped out the old battery. Unfortunately, somehow while this was going on, I caused the minute hand and the other small hand (not sure it's purpose) to fall off! And I have no idea how to fix this (though very happy to try anything). The inside of this is a Miyota IL45 and I assumed the first thing I'd need to do is get the stem disconnected from the movement. I tried pushing a pin in some of the holes and gently tugging on the crown/stem to get it out. But it didn't work and I have no idea where the release is. So that would be the first step I think... After that, I don't know how to get at the hands to put them back in place. So that's the harder step two. Would very much appreciate any help on this. From what I can tell, this watch doesn't seem to be very repairable. But hoping you guys can guide me!
    • On any posting, upvote is on the top left, like and other feedback types on the lower right.
    • Update: so i cleaned the watch completely and replaced the mainspring with one that i had. Had to anneal the end and bend in over to catch the barrel hook.

      I then examined the jewels and found one badly damaged jewel and two other cracked jewels (fix later). Then i noticed that a tooth on the center wheel was bent completely over. I wedged in a knife and was able to move the tooth back without breaking. Lots of work remaining on this old beast.


      Sent from my iPhone using Tapatalk Pro