Cannon pinion problem.

[JohnR725]

18 hours ago, Neverenoughwatches said:

I dont want to be in the habit of turning to a parts supplier everytime i have a problem. I've spent 40 years of my working life getting over problems,

This is watch repair which means replacing parts is part of repairing. It shouldn't be considered a bad thing.

10 hours ago, nevenbekriev said:

(+locktite is OK)

Loctite is fine but make sure it's all Cleaned up and removed before you snap it on otherwise you're going to have interesting problem.

[Neverenoughwatches]

6 minutes ago, JohnR725 said:

This is watch repair which means replacing parts is part of repairing. It shouldn't be considered a bad thing.

I understand that John , i dont think its a bad thing when necessary. But if something is repairable then that is something more that i can learn from. I could have swapped this part in seconds, as it was it took me well over an hour fiddling around setting up a drill and organising the a drill bit that would work, that was an hour of learning for me. 

[rehajm]

15 hours ago, nevenbekriev said:

 

Me thinks... there is no cap at all, this is one whole part.

 

Ah…now it makes sense. Thank you all…I’m grateful two piece cannon pinions just became more rare …

Edited September 2, 2024 by rehajm

[oldhippy]

How about you drill into it a little ways super glue a pin to it and pull. 

[Neverenoughwatches]

Look like the fault was the cannon pinion was wrong and pressing down too hard on the plate making it tight to set time but also dragging on the amp and reserve. This one fits with a gap at the plate,suppose i could have reduced the depth of pinion or reset the center wheel indentations. Originally i replaced the mainspring with a thicker one that caused some rebank, the old one is now back in and has been running the watch for a day, this is the tg after one day, not regulated , cleaned or oiled and after some serious manhandling. Yes the lift angle is 65 ° visually accounted for unless someone had a different idea of an Oris 291 pin lever.

On 9/2/2024 at 12:23 PM, rehajm said:

Ah…now it makes sense. Thank you all…I’m grateful two piece cannon pinions just became more rare …

Okaaay so now I'm on the lookout for one

[AndyGSi]

14 minutes ago, Neverenoughwatches said:

Yes the lift angle is 65 ° visually accounted for unless someone had a different idea of an Oris 291 pin lever.

65 sounds a bit high to me but can't confirm a figure.

How do you calculate the lift angle? Do you use the timegrapher?

[Neverenoughwatches]

1 hour ago, AndyGSi said:

65 sounds a bit high to me but can't confirm a figure.

How do you calculate the lift angle? Do you use the timegrapher?

I also thought it seemed high but yes Andy visually to 180° with marks on the balance wheel and the plate and then adjust the tg LA to meet the same 180° amplitude that i concluded visually.

If the balance wheel has 2 spokes this makes marking up easier. This is at rest obviously and check to see that the impulse and fork are lined through so the movement does need to be in beat. I choose one of the spokes as a register then place a dot of ink ( fluorescent would be lovely ) on the rim at spoke center ( i find the bottom edge of the rim works best sometimes depending on where the spokes are positioned in relation to the plate or a bridge. At the opposite spoke ( 180° ) i then mark whatever is next to it , be it a bridge or the plate ( you choose which spoke  works best for marking up  ). All that remains is to slowly wind up and watch the two mark reach alignment, its kinda fun seeing the approach take place, fluorescent ink and uv light . When the marks get close winding up needs just a click at a time and with time to settle between each click so this part shouldn't be rushed, its easy to overshoot if you lose concentration then you either have ho start over or just guess it.  I'm sure you know all this Andy so no offence i just thought anyone else beginner wise reading can pick the bones of the idea and make use of it.  Now if someone has an Oris 291 in running order check its lift angle for me

[Neverenoughwatches]

Finally got this little Oris tank back on my wrist ( after fiddling with the Westclox) with a half decent strap. I went with Frank's ( praezis ) idea of drilling a hole in the top of the cannon pinion so i could then tap the broken cw arbor out from the top end, thanks for the suggestion Frank it seemed like the safest option. And Nev's idea of gluing an iron tapered pin to fill the hole, in fact it was a stainless steel panel pin that i shaved down with a mini sanding disk on a low powered rotary type tool. Filed down and polished up,  the join is visible but only under good light and magnification . Running solid up to now , 28 hours and it doesn't appear to have lost any time. This watch goes back around 2 years to my initial attempts at restoring it,this cannon pinion with jammed cw arbor inside it, broken hairsprings a balance staff , a dodgy overpowered mainspring,  a new crystal that i put off buying then aquired a big stock of fancy crystals that was just over the cost of the one i nearly bought for it.  And last night closing the minute hand hole, it still needs the hands restoring , bluing and luming but I'm happy to wear it for a while as it is, luming is something i haven't even tried yet, mostly because i enjoy originality,  a watch's history, it's age , its life and its deterioration unless something is needed to protect and prolong it. Just as we should embrace growing old gracefully , the aching back, the dodgy knees, hair loss, hair growth in the wrong places , stiff hands, failing vision, I'll stop now before we all get depressed about the inevitable . Time can be short ,so make the most of what we have, grab any opportunities that come our way to make life more enjoyable.  Signing out people, have a great day and make the most of it.

Rich X